Physics Homework Questions & Answers Archive

In the sport of curling, large smooth stones are slid across an ice court to land on a target. Sometimes the stones need to move a bit farther across the ice and other times players want the stones to stop a bit sooner. Suggest a way to increase the kinetic friction between the stone and the ice so that the stone stops more quickly. Next, suggest a way to decrease the kinetic friction between the stone and the ice so that the stone slides farther along the ice before coming to a stop.

The range of the correlation coefficient is from 0 to 1 . True False

If you are not happy with your timing effort, click on the curling stone to reset the system Otherwise, find the velocity and KE energy of the stone and check your work

The basin and Range region has clusters of steep, high separated by low-lying basins.

1. Preračunaj 20 m/s koliko je to km/h i preračunaj 36 km/h koliko je to m/s. 2. Rezervoar ima dimenzije 40cm x 40cm x 200cm, koliko je to litara, cm³, m³? 3. Neki predmet pada 10 sekundi, koja brzina dostigne u trenutku pada i koji put prijeđe za to vrijeme. Neka je g=10m/s². 4. Žarulja je spojena na napon 12V, ampermetar očitava struju snage 3A. Koliki je električni otpor žarulje? 5. Koliko je otpor žarulje ako je napon bio 6V? 6. Hidraulična dizalica ima radnu površinu 100cm² i tlačnu površinu 30cm². Koliku silu treba primijeniti na tlačnu površinu kako bi radna površina podigla vozilo teško 3 tone. 7. Koliko je rastezanje željezne šipke dužine 200cm ako je zagrijemo na 500°C uz koeficijent istezanja za željezo 12x10⁻⁶ °C⁻¹.

The sun is approximately 93 million miles from earth Write this number in scientific notation

In her Physics Lab, Melanie rolls a 10 g marble down a ramp and off the table with a horizontal velocity of 0.5 m / s / s. The marble falls in a cup placed 0.51 m from the table's edge. How high is the table?

Four objects are held in position at the corners of a rectangle by light rods as shown in the figure below. (The mass values are given in the table.) m1(kg) m2(kg) m3(kg) mA(kg) 2,70 2,30 3,70 2,10 (a) Find the moment of inertia of the system about the x-axis. kg · m^2 (b) Find the moment of inertia of the system about the y-axis. kg · m^2 (6) Find the moment of inertia of the system about an axis through O and perpendicular to the page. kg · m^2

Which of the following instruments is not typically found in a symphony orchestra? clarinets timpani synthesizer cellos

Để tìm dòng điện trên mỗi nhánh bằng phương pháp dòng điện nhánh, sử dụng định luật Kirchhoff 2 cho vòng 1 , biếu thức nào sau đây là đúng? A Z1 cdot dotI1-Z2 cdot dotI2=0 B Z1 cdot dotI1-Z2 cdot dotI2=dotE1 C dotI1 cdot Z1+dotI2 cdot Z2=dotE1 D Z1 cdot dotI1+Z3 cdot dotI3=-dotE1

Graph the logarithmic function (g(x)=log 3(x+3)). To do this, plot two points on the graph of the function, and also draw the asymptote. Then, click on the graph-a-function button. Additionally, give the domain and range of the function using interval notation. Domain: Range:

The image of a microscopic specimen, that will be received by the eye, and converted to a retinal and visual image, is the square image.

A contestant in a winter games event pushes a 40.0 kg block of ice across a frozen lake as shown in the figure below. (i) The coefficient of static friction is 0.1 and the coefficient of kinetic friction is 0.03. (For each answer, enter a number.) (a) Calculate the minimum force F (in N) he must exert to get the block moving. N (b) What is its acceleration (in m/s^2) once it starts to move, if that force is maintained? m/s^2

If work is done BY the system (as opposed to ON the system), the value of w will be a.) negative b.) positive c.) small d.) large

Geometry: TX > Chapter 6: Perpendicular and Angle Bisectors > Section Exercises 6.1> Exercise 18 Tell whether the information in the diagram allows you to conclude that DB=DC. Explain your reasoning. 18 No. You would need to know that AB ≅ AC. No. You would need to know that ∠BDA ≅ ∠CDA. Yes. ∠BAD ≅ ∠DAC, so DB=DC. Yes. D is on the angle bisector of ∠BAC, DB ⊥ AB and CD ⊥ AC, so DB=DC.

Vector v has components of ⟨5,8⟩. Vector w is equivalent to 4 v. What are the components of vector w? <5,8> <-5,-8> <20,16> <20, 32> <40, 64>

A cue stick has a mass of 0.5 kg. The cue stick hits a ball with a mass of 0.2 kg at a velocity of 2.5 m / s. What is the velocity of the ball after it is hit? (1 point) 2.5 m / s 6.3 m / s 3.6 m / s 8.3 m / s

What is the fastest motion that can be measured in any frame of reference? (1 point) 300,000 m / s 186,000 km / s 300,000 km / s 186,000 m / s

Before being replaced in 2016, a large Ferris wheel on Chicago, Illinois' Navy Pier had a diameter of 140 feet and the riders boarded from a platform 10 feet above the ground. The Ferris wheel completed one rotation every 7 minutes. Express a rider's height, H, in feet above the ground as a function of time, t, in minutes. a.) H(t)=-70 sin (2 pi/7 t)+80 b.) H(t)=-70 cos (2 pi/7 t)+80 c.) H(t)=70 cos (2 pi/7 t)+80 d.) H(t)=70 sin (2 pi/7 t)+10

Factor the polynomial completely. If the polynomial is not factorable, write "prime" as the answer. 2x^2+9x+4

Katja and Janie are paddling a canoe on a river in the direction of the current. In still water, they can paddle 1 mile in 24 minutes. The river current moves at a speed of 1 mile in 12 minutes. At what speed, in miles per hour, are Katja and Janie traveling?

25% of Matter Use the References to access important values if needed for this question. A mixture of helium and carbon dioxide gases is maintained in a 7.36 L flask at a temperature of (47^circ C). If the partial pressure of helium is (0.402) atm and the partial pressure of carbon dioxide is 0.370 atm, the total pressure in the flask is (square) atm.

(2) (a1=2), (an+1=fracanan+3) ((n=1,2,3, ldots)) Como (an+1=fracanan+3), (frac1an+1=) Sea (bn=frac1an). Como (bn+1=)

What is the largest interval containing x=2π on which sin(x) is one-to-one? Select one: a. [π, 3π] b. [π/2, 5π/2] c. [3π/2, 7π/2] d. [3π/2, 5π/2]

Multiple Choice Question Which of the following is the part of the marketing mix that seeks to create value by providing features and benefits that meet consumers' needs? Placement Product Positioning Promotion

What term describes a signal traveling toward a particular center or point of reference? efferent sensory effector afferent

Sound travels slower than light

Given that point B is the centroid of triangle CDE, which of the following is true? The length of BG is half of the length of EB. The length of BG is one-third of the length of EG.

22. The overall lightness or darkness of a radiograph is called a. density b. contrast c. definition d. f ∘ g packets following ry store film 24. What device is used to control the size and shape of the primary x-ray beam? a. filter b. rectifier c. collimator d. film holder 25. Which material provides the best protection from x-ray photons? (stops xrays) a. aluminum b. concrete c. lead d. wood 26. The cervical collar on a lead apron is placed to protect the: a. reproductive organs b. vital organs in the chest area c. thyroid gland d. spinal column 27. According to the nuclear regulatory commission, the annual maximum permissible dose (MPD) to occupationally-exposed individuals should not exceed: a. .03 Sv(30 msv) b. .05 Sv(50 mSv) c. 3.0 Sv(3000 mSv) d. 5.0 Sv(5000 mSv) 29. The paralleling technique of radiographic exposure fulfills which of the following principles of ideal projection? 1. The radiation source is small 2. The source-object distance is long 3. The object-film distance is short 4. The object and film are parallel 5. The central ray strikes the object and film at a 90 degree angle a. 1,2,3,4 b. 1,2,3,5 c. 1,2,4,5 d. 1,3,4,5 e. 1,2,3,4,5 30. After the x-ray unit is turned off, for how long do x-rays continue to exist in the room? a. For 6 seconds if the exposure time was 1 / 6 second b. For 6 minutes if the exposure time was 1 / 6 second c. It depends on the humidity in the room d. It depends on the kvp setting e. The x-rays no longer exist in the room once the exposure is complete

The transformer winding which is the power input winding is called the winding. Select one: a. primary b. secondary c. tertiary d. tapped

Q4. A body with density d=2 g / cm^3 sinks in the liquid with density d=1g / cm^3, If drag force Ff=100 v Vb eta. Where Vb is volume of the body, v=20 m / s is terminal velocity and eta is viscosity. Find the viscosity eta. A) 1 Pas B) 2 Pas C) 4 Pa.s D) 5 Pa.s E) 3 Pa.s Q5. Which one is incorrect. A) In specular reflection some of the reflected rays are parallel. B) In diffuse reflection some of the reflected rays can be parallel. C) For the image in a plan mirror right is left. D) A reflection produced by a smooth surface is Specular. E) Reflection from a rough surface is Diffuse. Q6) 2 kg metal with volume 10^(-3) m^3 sinks in the liquid with density 1g / cm^3. What is the acceleration of the metal in terms of the gravitational acceleration g. A) g / 5 B) g / 3 C) g/4 D) g E) g / 2 Q7) 216 kg spherical object with density 2 g / cm^3 sinks in the liquid with density 1 g / cm^3 and viscosity eta=10 / 3 Pa.s. What is the terminal velocity in terms of m / s. (Assume pi=3 and g=10) A) 50 B) 40 C) 30 D) 60 E) 20 Q8) How much heat energy is required to increase the temperature of 2 kg water from 40 Celsius to 80 Celsius? ( C=1 cal / gK ) A) 40000 cal B) 80 Cal C) 80 cal Q9) If temperature decreases to K=0 Kelvin entropy goes: A) zero B) maximum C) does not change D) remains constant E) none Q10) Galvanometer measures: A) Resistance B) Voltage C) Current D) Capacitance E) none Q11) A cubic object with volume 27000 cm^3 and density 2 g / cm^3 is on the incline with angle 60 degrees. find the pressure on the surface of the incline. A) 30000 Pa B) 20000 Pa C) 60000 Pa D) 3 Pa E) 6 Pa Q12) After closing the S gate. If the capacitance is C=2 F, what is the charge of the capacitor at the end? A) 6 C B) 3 C C) 9 C D) 2 C E) none

Aprendizaje evidente Imagina que viajas al planeta NEOF-78 y te encuentras con que la aceleración gravitacional es cincuenta veces la fuerza gravitacional en la Tierra. a) ¿Con qué fuerza te jalará hacia su centro? b) ¿Podrías vivir en ese planeta? Argumenta tu respuesta.

Use the graph of f(x) shown below to determine each of the following limits. If any of the limits do not exist, enter ∅ as your answer. Provide your answer below: a. lim x → 2- f(x)= □ b. lim x → 2+ f(x)= □ c. lim x → 2 f(x)= □

Internal Reflection Light A ray in glass (n=1.51) reaches a boundary with air at 49.2 deg. Does it reflect internally or refract into the air? Enter 0 for reflect, and 1 for refract. (Water n=1.33, Air n=1.00)

As shown in the figure, three charges are at the vertices of an equilateral triangle of side 5 cm. The charge q₁ is -6.5 nC, charge q₂ is -2.5 nC, and charge q₃ is -2.5 nC. What is the magnitude and direction (angle made with positive x-direction) of the net electric force on the charge q₁ due to the other two charges? ( k = 1 / 4 πε₀ = 9.0 × 10⁹ N·m² / C². Magnitude = .00000858 N Direction = 30 degree

Unit Exam - Sound Two notes are an "octave" apart when the two are identical one is twice as loud as the other one travels twice as fast as the other one has twice the frequency of the other

Question 17 2 pts When should percent error be used? When you compare two accepted values of the same quantity. When you compare two experimental values of the same quantity. When you compare an accepted value to an experimental one. We should never use percent error.

An engineer is trying to determine the height from which she needs to release a 57 kg wrecking ball such that the wrecking ball will be traveling 11.1 m / s when it strikes the building at the position shown. Neglect drag. List the energy types at the initial and final time and whether work and loss (due to non-conservative forces) occur as well as the corresponding amounts of energy. initial: GPE J work? no work J loss? no loss 1 v final: GPE KE From what height above the ground does the engineer need to release the ball? x 6.3 unit Using g=9.8 m / s^2

Consider the line y=-5x+7. Find the equation of the line that is parallel to this line and passes through the point (-7,5). Find the equation of the line that is perpendicular to this line and passes through the point (-7,5).

A trumpet plays its 3rd harmonic at 510 Hz. It then opens a valve, which adds 0.110 m to its length. What is the new 3rd harmonic frequency? (Hint: Find the original length.) (Speed of sound = 343 m / s ) (Unit = Hz )

displacement u v · t a · t → 1/2 a · t^2 time t a · t → v · t = Δx = v · t + 1/2 a · t^2

Which of the following statements is true concerning the hypothetical electrochemical cell depicted below? (M1 and M2 are differing metals) M1M^2+(aq) M^+(aq)M2 M^2+(aq)+2e^- M1(s) ; E°=-2.91 V M^2+(aq)+e^- M2(s) ; E°=-2.98 V The cell reaction is spontaneous with a standard cell potential of 0.07 V. The cell reaction is nonspontaneous with a standard cell potential of -0.07 V. The cell reaction is spontaneous with a standard cell potential of 5.89 V. The cell is at equilibrium. The cell reaction is nonspontaneous with a standard cell potential of -5.89 V.

Which triangle is congruent to triangle CAT by the ASA Postulate?

Select the best experiment. Which of the following would be an effective experiment to test whether fresh water freezes at a higher temperature than salt water? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a Note the air temperature each day and record whether the pond is frozen and whether the ocean is frozen. b Physically isolate an area of ocean water that is the size of the freshwater pond and measure air temperature and whether each body of water is frozen. c Using distilled water and water with salt dissolved in it, try to freeze both samples in a freezer at several different temperatures and observe whether fresh water freezes at higher temperatures. d Use a large barrier to eliminate the current and waves in the ocean to ensure that these conditions are identical with those in the pond and then measure air temperature and whether each body of water is frozen.

Determine whether the following statement is true or false: The graph of a rational function may intersect a horizontal asymptote.

The graph of the function f(x) is shown below. At which point(s) is f not differentiable? At which point(s) is f discontinuous? Use a comma to separate multiple x-values. Provide your answer below: The function is not differentiable at the point(s) x= and is discontinuous at the point(s) x=

2. Identify: What fraction of the thickness of the thickest continental crust is the thickness of the oceanic crust? Give your answer as a reduced fraction.

Bros256-Week 1 Case Study: Gastroesophageal Reflux Disease The stomach acts as a major site of protein digestion, utilizing a mixture of hydrochloric acid and proteases to breakdown complex proteins into peptides that can be further digested in the small Intestine. However, the utilization of such a strong acid within the body can lead to tissue deterioration if steps are not taken by the digestive system. Within the stomach, mucosal cells can secrete an alkaline mucus that will coat the stomach mucosal lining, preventing the acid from coming into direct contact with the lining. Some conditions such as in peptic ulcers will result in patches within the stomach lining that are not protected with mucus, leading to the acid breaking down the lining. To prevent the acid from escaping the confines of the stomach, sphincters are utilized to prevent the flow of acid up through the esophagus (lower esophageal sphincter) and down to the duodenum (pyloric sphincter). Gastroesophageal reflux disease (GERD) occurs when stomach acid is regurgitated into the esophagus and can lead to a burning sensation in the chest, a sour taste in the back of the throat, sore throat, nausea, and bloating. Some of the conditions that can increase the prevalence of GERD include the consumption of excessive amounts of caffeine, alcohol, chocolate, or spicy foods; pregnancy; delayed stomach emptying; and birth defects such as esophageal atresia (narrowing) and hernias. Common treatments include a change in lifestyle and diet, antacids, histamine H2-receptor antagonist medications, and proton pump inhibitors (PPIs). Antacids work by neutralizing the stomach acid and inhibiting the proteases. Histamine H-receptor antagonists work by preventing the inflammatory responses within the stomach, leading to less production of stomach acid. Proton pump inhibitors act on the proton pumps found in stomach acid producing cells and preventing the pushing of hydrogen ions into the lumen of the stomach, preventing stomach acid from being produced. Background: Siobhan Smith, a 45-year-old instructor, has come to the clinic to discuss frequent "heartburn and vomiting" for the past 3 months. She has no issues with swallowing, food getting stuck, or respiratory issues. There is no abdominal pain. She has tried over-the counter antacids with only a little relief. Desired Outcomes: 1. Determine if Siobhan's sensations of "heartburn" are, in fact, gastroesophageal reflux disease (GERD). 2. Educate Siobhan on the potential causes of GERD. 3. Identify appropriate recommendations based on the findings of a GI endoscopy. Findings: Siobhan's upper GI endoscopy found inflammation within the esophageal and pharyngeal mucosa. No abnormal findings were found within the stomach of intestines. A further esophageal pH test determined that excess acid was built up within the esophagus. Questions: 1. What is the anatomical structure that malfunctions in individuals with GERD? 2. Explain how stomach acid can affect mucus membranes that are not adequately protected.

What is the difference between speed and velocity? Select one: a. Speed only tells how fast an object is moving but velocity tells how fast and in what direction. b. There is no difference between speed and velocity. c. The units are different. d. Speed tells how fast an object is moving and velocity tells how quickly the object changes speed.

Oceans and Climate Quick Check Which qualities of the ocean help it to absorb heat? Select the three correct answers. (2 points) a low evaporation point large surface area transparency to electromagnetic radiation Water can be a solid, liquid, or gas at Earth's surface. proximity to land a high specific heat capacity compared to land or air

Table 2 Relationship between Volume and Pressure. Volume of Water Added (mL) Volume of Air in the Erlenmeyer Flask (mL) Pressure Inside the Erlenmeyer Flask (atm) --- --- --- 0 mL type your text here 1.000 atm 10 mL type your text here 1.058 atm 20 mL type your text here 1.123 atm 30 mL type your text here 1.197 atm 40 mL type your text here 1.282 atm 50 mL 1.379 atm

Use the graph of F, shown on the right, to find the given limit. When necessary, state that the limit does not exist. lim as x approaches -1 from the right F(x) A. lim F(x) = (Type an integer or a simplified fraction.) x approaches -1 from the right B. The limit does not exist.

Which system helps to move the body? integumentary muscular endocrine cardiovascular

A 405-N rightward force is used to drag a large box across the floor with a constant velocity of 0.678 m / s. The coefficient of friction between the box and the floor is 0.795. Determine the mass of the box.

TRUE or FALSE: Momentum is a vector quantity.

JAL EXAM REVIEW Question 8, 3.1.57 HW Score: 11.25%, 4.95 of 44 points AL Part 3 of 3 Points: 0 of 1 Save An athlete whose event is the shot put releases a shot. When the shot whose path is shown by the graph to the right is released at an angle of 40 degrees, its height, f(x), in feet, can be modeled by f(x)=-0.01 x^2+0.8 x+5.5, where x is the shot's horizontal distance, in feet, from its point of release. Use this model to solve parts (a) through (c) and verify your answers using the graph. a. What is the maximum height of the shot and how far from its point of release does this occur? The maximum height is 21.5, which occurs 40 feet from the point of release. (Type an integer or decimal rounded to four decimal places as needed.) b. What is the shot's maximum horizontal distance, to the nearest tenth of a foot, or the distance of the throw? 86.4 feet (Type an integer or decimal rounded to the nearest tenth as needed.) c. From what height was the shot released? square feet (Type an integer or decimal rounded to the nearest tenth as needed.)

Use transformations of the absolute value function, f(x)=x, to graph the function h(x)=x-2+3. What transformations are needed in order to obtain the graph of h(x) from the graph of f(x)? Select all that apply. A. Reflection about the y-axis B. Vertical stretch/shrink C. Horizontal shift D. Reflection about the x-axis E. Vertical shift F. Horizontal stretch/shrink

The other triangle has side lengths 18,7 , and 15. Compute the sum of the squares of the shorter lengths. 7^2 + 15^2 = 274 Compute the square of the longest length. 18^2 = 324 What kind of triangle is it? - Acute triangle - Right triangle - Obtuse triangle

Consider the following function and express the relationship between a small change in x and the corresponding change in y in the form dy=f'(x) dx. f(x)=cot 8 x dy=

finish, the answer to the title question will remain. (1) d=rt where d is the distance traveled by an object moving at speed r in time t. Find d if r=52 m / sec, t=8 sec.

How much energy (in kJ) is required to raise the temperature of 219 g of water by 75.0°C?

In the figure, a small block of mass m=0.027 kg can slide along the frictionless loop-the-loop, with loop radius R=18 cm. The block is released from rest at point P, at height h=3 R above the bottom of the loop. How much work does the gravitational force do on the block as the block travels from point P to (a) point Q and (b) the top of the loop? If the gravitational potential energy of the block-Earth system is taken to be zero at the bottom of the loop, what is that potential energy when the block is (c) at point P, (d) at point Q, and (e) at the top of the loop? (a) Number Units (b) Number Units (c) Number Units (d) Number Units (e) Number Units

Consider the following equation. 4 x^3+3 x y-2 y^3=3 Find the slope of the tangent line at (1,-1).

6. What is the arrow pointing to in the illustration? * Wavelength None of these answers are correct Amplitude Frequency

Find the period and amplitude y=-3 sin (π/3 x)

After the block is released, in which of the following sequences of positions is the speed of the block ordered from fastest to slowest? A block released from rest at position A slides with negligible friction down an inclined track, around a vertical loop, and then along a horizontal portion of the track, as shown above. The block never leaves the track. (A) B C D E (B) B E C D (C) D C E B (D) E a C D (E) E D C B

Electromagnetic waves are also known as The electromagnetic spectrum is made up of regions. These regions are: Radio waves have wavelength ( λ ) and frequency. Gamma waves have wavelength (λ) and frequency. Visible light makes up a portion of the electromagnetic spectrum. What does a prism do? has the longest wavelength in the visible range. has the shortest wavelength in the visible range. When all wavelengths of the visible spectrum hit your eye at the same time, you see When atoms absorb energy, electrons move away from the nucleus and are called excited electrons. Electrons instantly move back to their original spots. When they do, light is Because every element has a unique arrangement of , each element gives off a different wavelength of light.

Ion concentration refers to the molar concentration of an ion in solution. It may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. For soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. For example, 1 M of AlCl3 is 1 M in Al3+ and 3 M in Cl-. 1 M of (NH4)2SO4 is 2 M in NH4+ and 1 M in SO42-. Part B If CaCl2 is dissolved in water, what can be said about the concentration of the Ca2+ ion? It has the same concentration as the Cl ion. Hs concentration is half that of the Cl- ion. Its concentration is twice that of the Cl- ion. Its concentration is one-third that of the Cl- ion.

Write the following complex number in the form a+bi. 12(cos 270°+i sin 270°) 12(cos 270°+i sin 270°)=0-12i (Type an exact answer.)

Find the value of Q in the following system so that the solution to the system is (x, y): x-3 y=4. x-3 y=4 2 x-6 y=Q

Find the value of x. Round your answer to the nearest tenth. a^2 + b^2 = c^2 x =

Which of the following wireless standards operates either exclusively or optionally in the 5 GHz spectrum? A. A and N B. G and N C. A and B D. A and G

Find the linear speed ν for the following. a point on the edge of a flywheel of radius 2 m , rotating 44 times per min The linear speed ν for a point on the edge of a flywheel of radius 2 m , rotating 44 times per min is (Simplify your answer. Type an exact answer, using π as needed. Use integers or fractions for any numbers in the expression.)

What is the measure of angle D?

A bicycle pedal is pushed straight downwards by a foot with a 12 Newton force. The shaft of the pedal is 20 cm long. If the shaft is π / 3 radians past horizontal, what is the magnitude of the torque about the point where the shaft is attached to the bicycle? Nm

A light ray passes from air (refractive index n1=1.00) into another material. The angle of incidence is 30°, and the angle of refraction is 20°. Using Snell's Law: n1 sin(theta1)=n2 sin(theta2) calculate the refractive index of the second material (n2), and identify the material from the following options: Quartz (n=1.46) Diamond (n=2.42) Water (n=1.33) Crown Glass (n=1.52) Quartz Water Diamond Crown Glass

The height y (in feet) of a baseball t seconds after it is hit can be modeled by the function y=-5t^2+20t+60. When will the ball first reach 75 feet above ground?

Per45 Dole / Unit 3 - Work, Energy and Power / Physics 39 Skill Set 3 Physics 39 Skill Set 3

Read the scenario, then answer the question. Your physics class is conducting an experiment on the energy exchange between colliding objects. You and your classmates have identical materials and are experimenting with identical conditions. You perform three trials, and your data is different in each trial. You compare results with your peers and find that everyone has different data. How is the scientific experiment limited? (1 point) The experiment shows that scientific knowledge is changing. The experiment shows that collecting data is flawed. The experiment shows that replication of natural events is difficult. The experiment shows that energy exchanges between objects differs.

rotation 90° clockwise about the origin

Identify the graphs that have the property that the instantaneous velocity at time t=6 is less than or equal to the average velocity over [0,6]. Select ALL graphs that have the stated property. Graph A Graph C Graph B Graph D

Find the slope of the tangent line to the graph of (f(x)=-x^2+5 x-1) at (x=4). Provide your answer below: [mtan =]

Which orbital is described by the quantum numbers n = 3, 1 = 1? Please write a step by step guide onhow to Make a sketch of this orbital.

Practice-RT2: Stacked Blocks-Number of Blocks Shown below are stacks of various blocks. All masses are given in the diagram in terms of M, the mass of the smallest block. Rank the total number of blocks in each stack. Explain your reasoning. Practice-RT3: Stacked Blocks-Average Mass Blocks are stacked on a table. Masses are given in terms of M, the mass of the smallest block.

A ship's sonar finds that the angle of depression to a wreck on the bottom of the ocean is 12.5 degrees. If a point on the ocean floor is 60 meters directly below the ship, how many meters is it from that point on the ocean floor to the wreck? Round your answer to the nearest tenth. (A) 277.2 m (B) 270.6 m (C) 61.5 m (D) 13.3 m Which triangle should be solved by beginning with the Law of Cosines? (A) m angle A=115, a=19, b=13

Which of Hawaii's five volcanoes are still considered to be active? Select the two that apply. Kohala Kilauea Mauna Kea Hualalai Mauna Loa Which of the following has the single most immediate effect on lava's ability to solidify?

Lisa Honda is driving her car at high speed through a horizontal turn on a sharply banked roadway. Identify the free-body diagram that shows the type and direction of the forces acting on Lisa's car.

Use the region R that is bounded by the graphs of y=1+sqrt(x), x=4, and y=1 to complete the exercises. Region R is revolved about the x-axis to form a solid of revolution whose cross sections are washers. a. What is the outer radius of a cross section of the solid at a point x in [0,4] ? b. What is the inner radius of a cross section of the solid at a point x in [0,4] ? c. What is the area A(x) of a cross section of the solid at a point x in [0,4] ? d. Write an integral for the volume of the solid.

Label the energy diagrams below and complete the statements about each. Energy is □ surroundings. Energy is □ surroundings.

What is the equation for the line of reflection for the giver

Find the surface area of revolution about the x-axis of y=3 sin (2 x) over the interval 0 ≤ x ≤ π/2

This is a measure from a point on one wave to the corresponding point on the next wave. This is the lowest point on a wave. This is the highest point on a wave. This is the distance a wave rises or falls from its equilibrium. This describes when the wave is at a rest position.

Find the smallest angle of triangle PQR.

The first order maximum in a double slit experiment occurs at an angle of 10.0°. Calculate the slit separation if a 625 nm light source is used. (3.60 × 10^-6 m)

3. (8 points) Find the minimum cost spanning tree on the graph below using Kruskal's Algorithm. List the edges which are included in the minimum cost tree.

What happens to air pressure in the lungs during inhalation? The volume of the chest cavity increases, which decreases the air pressure in the lungs.

Science 8 Section 10VC / Quarter 2 / Week of December 9 / 1. One of the best ways to avoid heat-related illness while in the sun is to stay active drink water

S U is parallel to V X. Complete the proof that m angle RTS + m angle VWY = 180°. 1. S U is parallel to V X - Given 2. angle VWY is congruent to angle STW 3. m angle RTS + m angle STW = 180° 4. m angle RTS + m angle VWY = 180°

Identifying the Ingredients of Nuclear Fusion Choose the ingredients needed for nuclear fusion. Check all that apply. heavy nuclei helium gas high temperatures hydrogen gas low pressure

A snowman casts a shadow that is 8 feet long at the same time a sledding hill casts a shadow that is 32 feet long. If the snowman is 4 feet tall, how tall is the sledding hill?

Two cars are about to collide. Car A has a mass of 1240 kg, and is traveling north at a speed of 18.3 m / s. Car B has a mass of 1990 kg, and is traveling south at a speed of 22.5 m / s. After the collision, the two cars become entangled, and the cars move as a single unit. Immediately after the collision, what will be the velocity of the combined unit? -5.04 m / s 4.56 m / s 3.16 m / s 9.49 m / s

Lewis is towing a 1140 kg car. His truck pulls with a force of 2850 N and increases the car's velocity from 0.9 s to 8.1 s.

Why is it difficult to calculate the momentum of a rocket?

Four research teams measured the density of a new alloy, and what each team wrote in its team notebook is shown in the table below. Suppose a later and more reliable measurement gives 8.10 g / cm^3 for the density of the same alloy. Decide which of the earlier measurements was the most accurate, and which was the most precise.

Two men are pushing a car with a force of 17 pounds. If the car weighs 2650 pounds, what is the total force being applied to the car? Round your answer to four decimals.

An adventure company runs two obstacle courses, Fundash and Coolsprint. The designer of the courses suspects that the mean completion time of Fundash is not equal to the mean completion time of Coolsprint. To test this, she selects 290 Fundash runners and 260 Coolsprint runners. (Consider these as random samples of the Fundash and Coolsprint runners.) The 290 Fundash runners complete the course with a mean time of 71.2 minutes and a standard deviation of 3.4 minutes. The 260 Coolsprint runners complete the course with a mean time of 71.8 minutes and a standard deviation of 3.1 minutes. Assume that the population standard deviations of the completion times can be estimated to be the sample standard deviations, since the samples that are used to compute them are quite large. At the 0.01 level of significance, is there enough evidence to support the claim that the mean completion time, μ1, of Fundash is not equal to the mean completion time, μ2, of Coolsprint? Perform a two-tailed test. Then complete the parts below. (a) State the null hypothesis H0 and the alternative hypothesis H1. - H0: - H1: (b) Determine the type of test statistic to use. (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the two critical values at the 0.01 level of significance. (Round to three or more decimal places.) and (e) Can we support the claim that the mean completion time of Fundash is not equal to the mean completion time of Coolsprint?

The following alteration was performed on an aircraft; a model F engine weighing 175 pounds was replaced by a model Z engine weighing 185 pounds at a -62.00 inch station. The aircraft weight and balance records show the previous empty weight to be 998 pounds and an empty weight CG of 13.48 inches. What is the new empty weight CG?

Find the derivative: f(x)=ln (x /(x-1)) -1 /[x(x+1)] 1 /[x(x-1)] None of these. -1 /x(x-1)

Use trigonometric identities to simplify the expression. csc(t) tan(t)

An object is said to be in rotational equilibrium if (1 point) it is either at rest or moving with a constant acceleration it is either at rest or moving with a constant speed it is either at rest or rotating with a constant angular velocity. it is either at rest or moving in a straight line with a constant speed. it is eithe at rest or rotating with a constant angular acceleration.

Triangle ABC is congruent to triangle EDC and C is the midpoint of line AE and line DB. If Boat A is 5 miles from Boat B, and Boat A is 30 miles from an object at point E, then what is the length of line DB to the nearest mile? 14 miles 25 miles 28 miles 12 miles

Radium-226, in grams, decays in such a way that after t years, the amount left over can be modeled by the equation A(t)=450 e^(-0.0004 t). How many grams of Radium-226 will remain after seven years? Round your answer to the nearest tenth.

b. How would the gravitational force between the two cars change if you pushed them farther apart? (1 point)

Growth Which of these involves the transfer of DNA from one bacterium to another using a hollow bridge that formed between the two bacteria? transformation conjugation transduction

Which one of the following is the main, overarching goal for Healthy People 2030, Reduction of health care costs Elimination of health disparities Investigation of substance abuse Determination of acceptable morbidity rates

In South's CSL Championship game, Ray - South's 80.0-kg tight end - was moving with a speed of 5.58 m / s when he collided mid-air near the goal line with an opposing player. If Ray experiences a force of 920 N over a time period of 0.284 s, then determine Ray's momentum change. (No or - signs.) Momentum Change kg ⋅ m / s

The atmosphere has approximately 78% nitrogen and 21% oxygen. All other gases, like argon and carbon dioxide, make up what percentage of the atmosphere?

3. Scenario: Opportunity cost and marginal analysis Jake has training for basketball Jake has only 15 hours available to devote to his training this week. Each hour he spends doing cardio burns 500 calories and each hour he spends lifting weights burns 300 calories. His coach has told him he needs to burn at least 6000 calories during his training this week. Which best principle or individual choice do these statements best illustrate? O Jake can use time more efficiently by spending the entire amounts of time doing cardio. O People face trade-offs. O Jake has an incentive to spend more time on shooting and dribbling. O Jake can use time more efficiently by spending the entire amounts of time lifting weights.

A 5-foot tall student cast a 4-foot shadow. If the tree next to her cast a 44-foot shadow, what is the height of the tree? (A) 35 1/2 ft (B) 45 ft (C) 51 1/2 ft (D) 55 ft

For #s 7-8, use triangle XYZ as shown. 7. The shortest side of a triangle similar to triangle XYZ is 15 units long. Determine the other lengths of the triangle.

Determine whether the following series converges. ∑(k=1 to ∞)(-1)^(k+1) (k^22+4k^11+9)/(k(k^22+9)) Let ak ≥ 0 represent the magnitude of the terms of the given series. Select the correct choice below and fill in the answer box(es) to complete your choice. A. The series converges because ak= □ B. The series diverges because ak= □ C. The series converges because ak= and for any index N, there are some values of k>N for which ak+1 ≥ ak and some values of k>N for which ak+1 ≤ ak. and for any index N, there are some values of k>N for which ak+1 ≥ ak and some values of k>N for which ak+1 ≤ ak. □ is nonincreasing in magnitude for k greater than some index N and lim (k → ∞) ak= □ D. The series diverges because ak= □ nonincreasing in magnitude for k greater than some index N and lim (k → ∞) ak=□. E. The series diverges because ak=□ is nondecreasing in magnitude for k greater than some index N. F. The series converges because ak=□ is nondecreasing in magnitude for k greater than some index N.

Use the limit definition of derivatives to show that d/dx cos x = -sin x.

Choose the inequality statement that matches the graph. -6x + 5y < 30 5x - 6y ≥ 30 -6x + 5y > 30 -6x + 5y ≥ 30

1. Note that in the previous video, the balloons were charged and then allowed to move freely, so the electric force caused the Saved balloons to move away from each other. In this video, however, the spheres are fixed in place. How do you know they are exerting a force on each other after they are charged? What evidence do you see from the video?

Listen This state of matter changes shape depending upon the shape of its container. a) solid b) liquid c) gas d) Both a and b change shape. e) Both b and c change shape.

A 0.68 kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstretched length triples. What is the mass of the second block?

The figures show three different systems of point charges, all of which have positive charge. In System X, three point charges of charge Q are arranged along a straight line with a spacing of 6/2. In System Y, three point charges of charge 2Q each are arranged at the corners of an equilateral triangle of side length s. In System Z, three point charges of different charges are arranged at the corners of a right triangle, as shown in the figure. Which of the following correctly ranks the electric potential energies UX, UY, and UZ of the three systems? Take the potential energy of each system to be zero when the point charges are infinitely far from one another.

Why are the equations (x+y-y=x) and (x-y+y=x) called identities? These equations are called identities because the variables can be replaced with any number, and after completing the operations, the result is the original number. I can test this by replacing the variables with numbers. If I replace (x) with 10 and (y) with 4, the resulting number sentence (10+4-4=10) is true. The other resulting number sentence (10-4+4=10) is also true.

Convert 3500 Gauss into Tesla:

A sample of gas in a flexible container initially occupies a volume of 3.87 L at 1.47 atm. Then, the volume of the gas inside the container decreases to 3.45 L at 342 K and 1.87 atm. The number of moles of the gas remains constant.

An object is undergoing circular motion with a tangential speed of 0.25 m / s. If the tangential speed were to double, how would this affect the centripetal acceleration? It would increase the centripetal acceleration by a factor of 4. It would not affect the centripetal acceleration. It would double the centripetal acceleration.

Find the indicated area under the standard normal curve. To the left of z=0.59 The area to the left of z=0.59 under the standard normal curve is . (Round to four decimal places as needed.)

Integral de -2 e^3 x : int-2 e^3 x d x Utilizamos la regla de la integral de una función exponencial e^a x : int e^a x d x=frac1a e^a x+C

Does this graph contain an Euler circuit?

On a graph of position versus time, what quantity does the slope of the graph represent? Multiple Choice Average acceleration Average velocity Total distance. Instantaneous velocity

BIG IDEAS MATH Geometry: CC 2015 Chapter 5: Congruent Polygons Section Exercises 5.2 Exercise 7 In the figure, triangle XYZ is congruent to triangle MNL. Find m angle Z. m angle Z =

Which type of chemistry would study gasoline, a carbon-based molecule? Biochemistry Organic Chemistry Nuclear Chemistry Analytical Chemistry

M Wed Jan 8 AA r08.core.learn.edgenuity.com Ane Welcame to TCECL Farrah Hopkins-lifrown - farrah.hopkinsbrowmi-gmail.co. 24. 24.25 TCEC EARTHSCI 2 A History of Global Climate Change Practice Active 1 2 3 Which of the following is predicted to be an impact of global warming? a. extreme weather b. ocean acidification c. species extinction d. all of the above Please select the best answer from the choices provided A B C D Activity

Module 6 Quiz Question 8 of 20 ( 2.5 points) Question Attempt 1 of 1 A researcher obtains the scores on the test from a random sample of 16 users of StudyFocus and a random sample chosen independently. For the users of StudyFocus, their sample mean is 493.6 with a sample variance of 8155.7. Assume that the two populations of scores are approximately normally distributed. Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (a) State the null hypothesis H0 and the alternate hypothesis H1. H0: μ1=μ2 H1: μ1=μ2 (b) Determine the type of test statistic to use. Degrees of freedom: (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the two critical values. (Round to three or more decimal places.) and

Use the graph in the function to find the domain and range of f. (Enter your answer using interval notation.) Domain ( ) (-∞, -1) ( ) [-2, 1) ( ) (-∞, ∞) ( ) [-1, 1) Range ( ) [-1, 1) ( ) (-∞, ∞) ( ) [0, ∞) ( ) (-∞, -1) x -4 -2 2 4 6 8 y -2 -4 4 2

If m1=23 kg and m2=38 kg, calculate the tension in the rope. 2 points 372.78 N 764.7 N 143.9 N 281.2 N If m1=27 kg and m2=438 kg, what is the acceleration of the system? 2 points

A spherical balloon is inflated and its volume increases at a rate of 16 in^3 / min. What is the rate of change of its radius when the radius is 5 in? The balloon's radius is increasing at a rate of (Round to three decimal places as needed.) at the instant the radius is 5 in.

∫a^a f(x) dx=0 Wahr Falsch ∫-a^a f(x) dx=0 Wahr Falsch ∫a^b dx ist nicht definiert Wahr Falsch

Step 2-Carefully toss the object in to the air. Observe: What did you notice?

The cheerleaders at a football game launch T-shirts into the crowd from the back of a golf cart that is 2 feet off the ground. The T-shirts have an upward velocity of 30 feet per second. Using the function y=-16 t^2+30 t+2, which of the following correctly identifies the vertex of the parabola and best explains its meaning? (1 point) The vertex is at (16.063,0.9375). The shirts will reach a maximum height of roughly 0.928 feet. The vertex is at (0.9375,16.063). The shirts will reach a maximum height of roughly 0.928 feet. The vertex is at (16.063,0.938). The shirts will reach a maximum height of roughly 16 feet. The vertex is at (0.9375,16.063). The shirts will reach a maximum height of roughly 16 feet.

Which statement best describes monsoons? They force cool, moist air from oceans to rise. They are winds that blow in the opposite direction of a normal wind. They bring heavy rain in the winter and in the summer. They influence precipitation as wind moves near a mountain.

How do you know if two line segments are parallel? A. Their slopes are reciprocals. B. Their slopes are negative reciprocals. C. Their slopes are equal. D. The slope of one line is the negative of the slope of the other.

(14) Which line is parallel to the line given below? [2] y = -(5/2) x - 7 (a) 2 x + 5 y = -5 (b) 2 x - 5 y = 30 (d) 5 x - 2 y = 8 (15) Which of the following lines is perpendicular to the equation given below? [2] y = -2 x + 8 (a) x + 2 y = 8 (b) x - 2 y = 6 (c) 2 x + y = 4 (d) 2 x - y = 1 (16) Which pair of lines are perpendicular? [2] (a) x - y = 7 and y = x + 3 (b) y = -4 x + 1 and 8 x + 2 y = -10 (c) y = -8 and y = 2 (d) x = 4 and y = -1 (17) Line m passes through the point (2, -7) and (4, -9). Line m is parallel to which line? [2] (a) y = -x + 2 (b) y = x - 9 (c) x = 5 (d) y = -1 (18) The line passing through which two ordered pairs would be perpendicular to the equation y = 4 x - 1 ? [2] (a) (1, -3) and (2, 1) (b) (-4, 7) and (-1, -5) (c) (-8, -4) and (0, -2) (d) (4, 2) and (8, 1)

If AB // DE, find the value of x in the following image.

R is the region bounded by the functions f(x)=1+x^2 and the g(x)=sqrt(x+1) and the lines x=0 and x=3. Represent the volume when R is rotated around the y-axis. Volume =∫ from 0 to 3 square dx

m . n * u v=k=25 =270 km =2=? Delta K=?

Question 1 (1 points) You want to predict the frequency with which a ball-on-spring system will oscillate. You measure the spring constant to be 106 N / m and use a ball of mass 1.21 kg. What is the linear frequency (in Hz)? Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23,-2, 1e6, 5.23e-8

1. Which of the following is not a unit of velocity? A. kg / s B. km / s C. m / h D. m / s

Select the correct graph of the derivative of the function f(x) given below.

Find the volume of the solid generated by revolving the region bounded by y=4 sqrt(x) and the lines y=4 and x=0 about a. the x-axis. b. the y-axis. c. the line y=4. d. the line x=1. a. The volume of the solid generated by revolving the region bounded by y=4 sqrt(x) and the lines y=4 and x=0 about the x-axis is 8 pi cubic units. b. The volume of the solid generated by revolving the region bounded by y=4 sqrt(x) and the lines y=4 and x=0 about the y-axis is 4 pi/5 cubic units. c. The volume of the solid generated by revolving the region bounded by y=4 sqrt(x) and the lines y=4 and x=0 about the line y=4 is 8 pi/3 cubic units. d. The volume of the solid generated by revolving the region bounded by y=4 sqrt(x) and the lines y=4 and x=0 about the line x=1 is 32 pi/15 cubic units.

Two large parallel metal plates are uniformly and oppositely charged and the electric field between them is 7.6 × 10^6 N / C. What is the charge density on each plate? All answers in μC / m^2

Exponential and Logarithmic Functions Finding half-life or doubling time Actinium-227 is a radioactive substance that decays according to the following function, where y₀ is the initial amount present, and y is the amount present at time t (in years). y=y₀ e^(-0.0321 t) Find the half-life of Actinium-227. Do not round any intermediate computations, and round your answer to the nearest tenth. years

Fersarel Plate Boundaries and Earth's Lan... NCE - Dominic / Unit 4 - Earth Science Transcript 1) Drag and drop the types of plate boundaries to match the pictures. Choices divergent plate boundary transform plate boundary convergent plate boundary 2) Choose the best answer. Where do earthquakes occur? Previous Next Revie zoom

What is the acceleration of a car moving along a straight road that increases its speed from 0 to 100 km/h in 10 s? 1 km/h ⋅ s 100 km/h−s 10 km/h ⋅ s 10 m/s^2

What is Newton's Third Law of Motion? What happens when the forces acting on a from moving, or do balanced forces cause

(11.) The propeller of a speedboat rotates 650 times per minute. Through how many degrees will a point on the edge of the propeller rotate in 2.4 seconds?

A cliff jumper runs off a 15 m high cliff. Rocks extend 3.0 m past the cliff bottom. We can ignore air resistance.

Question 28 2 pts Which of the following measures of central tendency is/are sensitive to extreme values? Mean Median Mode All of the above

Determine whether this study is an observational study or an experiment. Explain. A research study compared the memory retention of subjects when a learning activity was followed by a brief period of wakeful rest and when a learning activity was followed by a brief period of distraction. The study is because it a treatment to the subjects.

Question-7: As the skater is skating back and forth, the total energy of the skater is

8 9 15 18 19

Which instrument can be used to find out which circuit to turn off without shutting off the breakers one by one? A) LOTO B) Circuit finder C) Mains tes D) Hot-cold-hot test

Which factors cause weather patterns? Check all that apply. - diverse landscapes - motion in space - oceans - seasons - solar radiation - fronts

Determine whether or not the sentence is a statement. The electric chair was invented by a dentist. Is the given sentence a statement? A. No, because the sentence is always false. B. Yes, because the sentence can be either true or false, but not both simultaneously. C. Yes, because the sentence is always true. D. No, because the sentence can be both true and false simultaneously.

What are the coordinates of point W?

What is a tectonic plate? * A region deep within Earth A continuous layer of rock that completely covers Earth A large slab of Earth's lithosphere A large slab of Earth's mantle

Two friends bought phones that cost different amounts but had identical batteries. After using the phones for a while, both friends had to turn them off to let the batteries cool. This table shows how the temperature of each battery changed over 5 minutes. Battery Initial temperature (°C) Final temperature (°C) Battery in the less expensive phone 35 22 Battery in the more expensive phone 35 25 During this time, thermal energy was transferred from each battery to the surroundings.

What categories is this triangle... With Sides? [Choose] With Angles? [Choose]

At an equilibrium position of a pendulum, the square is at a maximum.

Aerodinamicamente, a pá da hélice em um avião em voo: A Para uma hélice de passo fixo, o ângulo de ataque será sempre igual ao do passo. B Devido à movimentação do avião, o ângulo de ataque será menor que o passo. C Devido a movimentação do avião, o ângulo de ataque será maior que o passo. D Nenhuma está correta

In a game of cornhole, Sasha tossed a bean bag and it landed at the edge of the hole. The hole can be represented by the equation x^2+y^2=5, and the path of the bean bag can be represented by y=0.5x^2+1.5x-4. To which points could she have tossed her bean bag? (-1,-2) or (-2,1) (1,-2) or (2,1) (-1,2) or (-2,-1) (1,2) or (2,-1)

y=2^(4x^4)

Find all real solutions to the equation -10 sin x = 5 sqrt(3) between [0°, 360°). A. 150°, 210° B. 240°, 300° C. 60°, 120° D. -60°, -120°

In a typical automotive engine, the piston contains compression ring(s). A. three B. two C. one D. four

Properties of Waves Quick Check Science 8B, GA 6.24/Waves Use the table to answer the question. Student Wavelength Frequency Darius increase increase Kathryn increase remain the same Anya decrease increase Franco remain the same decrease Four students write their ideas about the relationship between wavelength and frequency. Which student is correct? (1 point) Franco Darius Anya Kathryn

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