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What happens when the core of the supergiant collapses? It becomes a White Dwarf It collapses into nothing Nuclear fission begins It becomes a Supernova
3. Common static electricity involves charges ranging from nanocoulombs to microcoulombs. (a) How many electrons are needed to form a charge of -4.00 nC (b) How many electrons must be removed from a neutral object to leave a net charge of +0.2500 μC?
Graph the system of inequalities: x-y ≤ 1 x+2y < 4
Even with the best and largest telescopes, we can't see all the stars in the Milky Way Galaxy, even though these same telescopes can show us other galaxies. Why is that? dust in the space between stars builds up over large distances and blocks the light from the stars behind the dustier parts of the Milky way the Milky Way Galaxy turns too quickly this is still an unsolved problem in astronomy starlight is not able to travel through black space the lights of Pikeville, Kentucky are too bright and interfere with our observations
2. How long must a pendulum be on the Moon, where g=1.6 N / kg, to have a period of 2.0 s ? 3. On a certain planet, the period of a 0.75-m-long pendulum is 1.8 s. What is g for this planet?
An insulated cup contains 75.0 g of water at 24°C. A 26.00 g sample of metal at 82.25°C is added. The final temperature of water and metal is 28.34°C. What is the specific heat of the metal?
3. HOCKEY The goals in a hockey rink are 6 feet wide. A hockey player is standing 25 feet directly in front of the left side of one of the goals. a. What is the maximum angle at which the player can shoot the puck to make it in the goal? 0=2 * tan^(-1)(w/(2d))=43 * 408 / pi degrees b. If the player skates forward 5 feet, how wide of a range of angles can the player shoot the puck to make it in the goal? 0=2 * tan^(-1)(0/(2a))=54.408 / 2 dog c c. Describe what happens to the maximum angle as the player gets closer to the goal. As the player skates closer to the goal, maximum angle theta increases due to the tangent function increasing. 4. KITES Suppose the string of a kite makes a 78° angle with the ground. If 45 feet of string is released, how high off the ground is the kite? h * L * sin(pi) h=4 sin(78°)=45/8+43 sqrt(3)/8+45 sqrt(3)/2 5. CURRENT The current I in amperes for a circuit at time t seconds is given by I=40 cos[60 pi(t+1/120)] a. Find the maximum current. Imax=40 amperes 6. WINDSHIELD WIPER A 12-inch windshield wiper blade rotates 120° as shown. Find the coordinates of the starting and ending points A and B of the tip of the blade relative to the pivot point O.
1.- TIEMPO DE ALTURA MAXIMA EN TIRO PARABOLICO 2.- VELOCIDAD FINAL EN MRUA 3.- LA VELOCIDAD EN EL MRUA 4.- EN TIRO VERTICAL ASCENDENTE LA VELOCIDAD 5.- LA ACELERACIÓN EN EL MRUA 6.- EN CAIDA LIBRE LA VELOCIDAD INICIAL 7.- ALCANCE EN EL TIRO PARABÓLICO 8.- UNIDAD DE VELOCIDAD EN EL S.I. 9.- DESPLAZAMIENTO EN MRU 10.- EN TIRO VERTICAL LA ACELERACIÓN
Convert 352 lightyears/century into feet/second. Show ALL the steps...answer to 2 decimal places.
-(pi/6)
A 0.60 kg mass is vibrating at the end of a spring. If the spring constant is 26 N / m, and the maximum displacement of the mass is 0.15 m, what is the speed of the object at its equilibrium position?
Question 11, 1.5.143 HW Score: 76.92% Part 1 of 2 Points: 0 of 1 1.5B Homework a. A wheelchair ramp with a length of 75 inches has a horizontal distance of 72 inches. What is the ramp's vertical distance? b. Construction laws are very specific when it comes to access ramps for the disabled. Every vertical rise of 1 inch requires a horizontal run of 12 inches. Does this ramp satisfy the requirements? a. The vertical distance of the ramp is
y > 3/2 x + 6
After 0.600 L of Ar at 1.06 atm and 245.0°C is mixed with 0.200 L of O2 at 313 torr and 104.0°C in a 400 mL flask at 25.0°C, what is the pressure in the flask? Be sure your answer has the correct number of significant figures.
Morgan drew 3 lines. - Line A moves in the same direction as Line B and the lines never intersect. - Line B forms a perfect right angle (90° angle) with Line C. Which statement is correct about these lines? Line B is parallel to Line C Line C is perpendicular to Line A Line C is parallel to Line A Line A is perpendicular to Line B Connor created an angle that formed a 130° angle. What type of angle did he create? obtuse straight acute right
Find the distance between Rivertown and Smithville if they are 0.8 cm apart on a map with a scale of 1 cm : 17.7 km.
A uniform 33.0-kg beam of length l=5.40 m is supported by a vertical rope located d=1.20 m from its left end as in the figure below. The right end of the beam is supported by a vertical column. (i) (a) Find the tension in the rope. N (b) Find the force that the column exerts on the right end of the beam. (Enter the magnitude.) N
What is the mass of an object accelerating at 3.9 m/s^2 as it experiences 225 N of force?
A scientist wishes to learn about volcanoes and earthquakes. Which of the following spheres should she most directly study? (2 points) Atmosphere Biosphere Cryosphere Geosphere
Convert the speed 25 mi / hr to feet / s
Lesson 2.1: Measuring Segments and Angles Congruent Angles
The momentum of an object is determined to be 7.2 x 10^-3 kg · m / s. Express this quantity as provided or use any equivalent unit. (Note: 1 kg = 1000 g).
The warmer weather of summer in many parts of the Northern Hemisphere is caused by the fact that during this period - this area is closer to the Sun than at other times. the Sun emits the greatest amount of energy. the melting of ice raises the sea level in this area. this area receives more direct sunlight.
Indicate the answer choice that best completes the statement or answers the question. ANALYZE GRAPHS Use the graph shown. The total enrollment at Central High School is 798 students. About what percent of the students at Central High are freshmen? Round to the nearest tenth if necessary. a. 30.7 % b. 27.1 % c. 22.6 % d. 19.7 %
Homeostasis
The mass of a radioactive substance follows a continuous exponential decay model. A sample of this radioactive substance has an initial mass of 1274 kg an decreases continuously at a relative rate of 7% per day. Find the mass of the sample after three days. Do not round any intermediate computations, and round your answer to the nearest tenth. kg
Which of Kepler's Laws explains: Planets orbit in an ellipse with the sun at one focus. 1st Law 2nd Law 3rd Law
Which of Kepler's Laws explains: Mercury has a shorter orbital period than Neptune
On Earth and the Moon, the mass of an object would be equal different but the weight would be different because of differences in gravity. Since the force of gravity on Earth is higher, you would expect to weigh more on Earth and less on the Moon.
The graph below is the function f(x) Select all statements below that you agree with. Note: You may be checking more than one box. No partial credit. f(2) is defined. lim x → 2 f(x) exists. lim x → 2 f(x) = f(2) The function is continuous at x=2. The function is not continuous at x=2.
A 2.80 kg mass is dropped from a height of 4.50 m. What is the potential energy of the mass when it reaches the ground? PE=[?] J
After a 100-lb. person steps on a bathroom scale and the reading is steady, the spring inside the scale is compressed with a force of (A) 100 lbs . (B) 50 lbs . (C) 200 lbs (D) 110 lbs .
What is the unit vector of v = ⟨6, -9⟩?
In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80 m / s^2. Ignore air resistance. A flea jumps straight up to a maximum height of 0.410 m. What is its initial velocity v0 as it leaves the ground? Express your answer in meters per second to three significant figures.
If a ball is thrown in the air with an initial height of 3 feet, and if the ball remains in the air for 3 seconds, then accurate to the nearest foot, how high did it go? Remember, the acceleration is a(t)=-32 ft / sec^2 v(t)=-32 t+47 s(t)=-16 t^2+47 t+3 Peak height =s(1.47) s(1.47)=[?] feet
While driving a car, you see a child suddenly crossing the street. Your brain registers the emergency and sends a signal to your foot to hit the brake. The car travels a reaction distance D, in feet, during the time it takes you to react, where D is a function of the car's speed r, in miles per hour. That reaction distance is a linear function given below. Complete parts (a) through (d). D(r) = (33r + 16) / 32 a) Find D(5), D(20), D(50), and D(65). D(5) = 5.7 D(20) = 21.1 D(50) = 52.1 D(65) = 67.5 (Round to the nearest tenth as needed.) b) Choose the correct graph of D(r). A. c. B. D. c) Interpret the meaning of the slope in the context of this problem. For every 1-mph increase in speed, the braking distance increases by .
Use the Sensible Heat Formula to determine the heating system capacity of the following system. CFM: 2500 Return air DB: 68 degrees Fahrenheit Supply air DB: 56 degrees Fahrenheit 32,400 BTU 27,778 BTU 21,600 BTU 18,519 BTU
Select the reason why these triangles are similar. If they are not, select "Not similar."
Which is the largest object in the solar system? a Sun b Moon c Earth d Saturn
What is the magnitude and direction net force on qi.?
A ball is thrown straight up in the air at a velocity of 100 feet per second. The height of the ball at t seconds is given by the formula: h=100 t-5 t^2. Find the maximum height of the ball and when it will land. Maximum height: ft Land after: seconds
A micro-transporter moves from one side of an evacuated chamber to another. It is powered by equal-magnitude, opposite-sign charges Q and -Q on top of two station points, as shown in (Figure 1). The transporter's mass is 1.0 g and it is carrying a positive charge of 6.0 × 10^-10 C. If a 7.0 × 10^-3-N friction force opposes the transporter's motion, what must be the magnitude of Q to make the transporter move with an initial acceleration of 1.0 m / s^2 ? Express your answer with the appropriate units.
Which list below describes a possible path of rain through the water cycle? (3 points) Evaporation, condensation, precipitation, runoff Runoff, ocean storage, evaporation, condensation Transpiration, condensation, precipitation, runoff Evaporation, precipitation, runoff, lake storage
7. The word pressure MOST NEARLY means: A. a quantity that has both size and direction B. the speed of an object in a particular direction C. the distance traveled divided by the time interval during which the motion occurred D. the upward force that keeps an object immersed in or floating on a liquid E. the amount of force exerted per unit area of a surface
Which of the following is true about the states of matter? SELECT ALL THAT APPLY Liquids have neither a definite shape nor a definite volume. Matter exists in solid, liquid, and gaseous states. Solids have a definite shape and volume.
Someone coughing in the audience or walking late during a presentation are examples of wha element in the speech communication process messages interference channe! feedback
10 Multiple Choice 1 point Which statement most accurately describes the second law of thermodynamics? Energy can be created or destroyed but it cannot be transformed. Energy cannot be changed from one form to another without a loss of usable energy. Energy cannot be created nor destroyed but it can be changed from one form to another. One usable form of energy can be completely converted into another usable form.
Which of the following is true for the function shown above. A Extrema =(3.47,-0.74) B Local Max =0.76 at x=-0.74 C Local Max =0 at x=5 D Local Max =-0.74 at x=0.76 E Local Max =-0.74 F Extrema =(0,0.6)
Which of the following would most likely utilize a particulate control device? a. a vacuum cleaner b. a factory smokestack c. a laundry dryer d. all of the above
4 Multiple Choice 1 point The Supine Legs in Straps Lower and Lift is done in what plane of motion? Sagittal Frontal Transverse All planes
When you stand at rest on a pair of bathroom scales, the readings on the scales will always each be half your weight. add up to equal your weight. each equal your weight.
A 1500-kg car moving at 15 m/s collided head-on with a 2000-kg SUV traveling at -20 m/s. If the car now moves at -1 m/s, what is the new speed of the SUV?
2. What is the slope of the line pasklaty thrownth the points A and B, as shown on the soxapto belown the A. -3 B. -1/3 C. 3 D. 1/3 3. Given a line with a slope of 4, how does of the line cifer if the sloge is changel
Emilio throws a marshmallow into the air from his balcony. The height of the marshmallow (in feet) is represented by the equation h=-16t^2+8t+48, where t is the time (in seconds) after he throws the marshmallow. How long does it take the marshmallow to hit the ground, where h=0? 0.5 seconds 3 seconds 2 seconds 1.5 seconds
Which of the following is not a factor in determining the effectiveness of a brake system? a. heat dissipation b. lubricant c. pressure d. frictional contact area
Is boiling water a physical or chemical change? Physical Chemical
Use the diagram of a box being pushed across the shop floor below to determine the weight of the object. Round your answer to the NEAREST WHOLE NUMBER and use the correct Unit: EXAMPLE: 15N
Solve the following system by graphing. y = -(8/3) x - 9 y = -(8/3) x + 1 (1,9) no solution None of the other answers are correct (-1,-9) (-1,4)
Consider M2 = 200 lb·ft and the resultant couple moment MR = Mx i + 12j. The magnitude of the Mx is ...... lb. ft. The magnitude of the moment M1 is .... lb. ft. The magnitude of the couple moment M3 is ..... lb. ft. The direction angel θz between the moment vector 150 lb. ft and z-axis is ....
The mass of a ball moving at 3 m / s with a momentum of 48 kg m / s is 12 kg, 16 kg, 4 kg, 144 kg, none of these.
A boat begins at A and heads straight across a river. Because of the 2 m/s river current, the boat lands on the opposite shore at C. If the river current was 3 m/s, then the boat would land on the opposite shore at (The boat speed relative to the water does not change.) a. the same location of C b. a location south of C c. a location north of C d. Nonsense! This is impossible to answer without knowing the time to cross the river.
Which electronic device would be considered a node in a lawyer's office network? A. A client's gaming system B. The office coffee maker C. The attorney's laptop D. The secretary's car navigation system
3. Two cats are on a seesaw, which is a 5.5 -meter long wood plank. The orange cat has a mass of 5.93 kg and is 0.361 meters from the edge of the plank. The black cat is sitting at 2.71 meters from the pivot point, what is the weight of the black cat?
Course: 26211 - Control Systems TAO; test session https://testrunner-ignite.prod.gcp-eu.taocloud.org/?deliveryExecutionld=3636124%25230964f38a4228%25230a 11 - Control Systems and Fundamental Concepts What type of coil arrangements should be in low-voltage remote control switching relays? a single coil a split line-voltage coil a single high-voltage coil three low-voltage coils
How do greenhouse gasses contribute to the Earth's temperature?
The map shows the present-day locations of the continents and oceans. The star shows the location of fossils from a prehistoric animal called Cynognathus. Based on past movement of tectonic plates, which other location would most likely also have Cynognathus fossils? A. Location A B. Location B C. Location C D. Location D
Find the slope of the line graphed below.
What is the angle between the given vector and the positive direction of the x-axis? (Round your answer to the nearest degree.) i+√15 j
A boat begins at point A and heads straight across a 60-meter wide river with a speed of 4 m / s (relative to the water). The river water flows north at a speed of 3 m / s (relative to the shore). The boat reaches the opposite shore at point C. Which of the following would cause the boat to reach the opposite shore in MORE time? Include all that apply. a. The river flows north at 2 m / s. b. The river flows north at 4 m / s. c. The boat heads across the river at 3 m / s. d. The boat heads across the river at 5 m / s. e. The river is 40 meters wide. f. The river is 80 meters wide. g. Nonsense! None of these affect the time to cross the river.
Identify this triangle's hypotenuse: AB BC AC Angle B
A military jet cruising at an altitude of 12.0 km and speed of 1300 km/h burns fuel at the rate of 71.6 L/min. How would you calculate the amount of fuel the jet consumes on a 950 km mission? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.
For the function involving the variables listed, use your intuition or additional research, if necessary, to complete parts (a) through (c) below. (day of year, average high temperature) over a 2-year period for a town a. Describe an appropriate domain and range for the function. Choose the appropriate domain for the function below. A. The domain is all daily average high temperatures over 2 years or -20°F to 120°F. B. The domain is all days over a 2-year period or 1 to 365, where day 1 is July 1st. C. The domain is all days over a 2-year period or 1 to 730, where day 1 is July 1st. D. The domain is all daily average high temperatures over 2 years or 50°F to 90°F. Choose the appropriate range for the function below. A. The range is all days over a 2-year period or 1 to 365, where day 1 is July 1st. B. The range is all daily average high temperatures over 2 years or 50°F to 90°F. C. The range is all daily average high temperatures over 2 years or -20°F to 120°F. D. The range is all days over a 2-year period or 1 to 730, where day 1 is July 1st. b. Make a rough sketch of a graph of the function. Choose the correct graph below. Let t represent time in days and F represent temperature in degrees Fahrenheit. c. Briefly discuss the validity of the graph as a model of the true function. Choose the correct answer below. A. The graph is a valid model of the function because time in days fluctuates as temperature in degrees Fahrenheit increases. B. The validity of the graph as a model of the true function can never be known. C. The graph is not a valid model of the true function. D. The graph is a valid model of the function because temperature in degrees Fahrenheit fluctuates as time in days go through seasons.
A particle is moving along a straight line with an initial velocity of 5 m / s when it is subjected to a deceleration of (a=(-1.8 v^1 / 2)) m / s(^2), where (v) is in m / s. Part A Determine how far it travels before it stops. Express your answer to three significant figures and include the appropriate units. Part B How much time does this take? Express your answer to three significant figures and include the appropriate units.
What effects does ionizing radiation have on the atmosphere? Select the two correct answers. (1 point) It ionizes atoms and molecules in the thermosphere. It helps atoms to escape Earth's gravity in the exosphere. It is the chief cause of warming in the troposphere. It forms ozone in the stratosphere.
Find an equation of the line that satisfies the given conditions. Through (4,9); parallel to the line passing through (5,7) and (1,3)
Question 9 0 / 1 pt (3) The graph of (y=frac-7 x-53 x+10) has a horizontal asymptote with equation (square) (enter the equation of the horizontal asymptote)
1. If Steve throws the football 50 meters in 3 seconds, what is the average speed of the football? 2. If it takes Ashley 3 seconds to run from the batter's box to first base at an average rate of 6.5 meters per second, what is the distance she covers in that time? 3. Bart ran 5000 meters from the cops at an average rate of 6 meters/second before he got caught. How long did he run? 4. If Justin races his Chevy S-10 down Highway 37 for 2560 meters in 60 seconds, what is his average speed? 5. Mike rides his motorcycle at an average speed of 20 meters/second for 500 seconds, how far did he ride? 6. Sarah backstrokes at an average speed of 8 meters per second, how long will it take her to complete the race of 200 meters length?
3. Ida hit a golf ball from the top of a hill. The height of the ball above the green can be modeled by the regression equation h(t)=-9.7 t^2+48.4 t+11.5 where h represent the height in meters and y represents the time in seconds. a) Use your knowledge of polynomial functions to describe the curve of this function. b) Determine the y-intercept. What does it represent in this context? Show your work. c) The roots of this equation are near t=-0.2 and t=5.2. What do these points represent, if anything?
Find a positive angle less than (2 pi) that is coterminal with the given angle. [ frac35 pi6 ] A positive angle less than (2 pi) that is coterminal with (frac35 pi6) is (square)
For the right triangle below, find the length of (x). Round to the nearest hundredth (two decimal places).
The deepest point in the ocean is located in the Mariana trench.
Question 14 Quiz: Pre-Class Quiz - The Process of Science As shown in the graph, how have atmospheric carbon dioxide levels changed between 1960 and 2018? atmospheric carbon dioxide levels have decreased atmospheric carbon dioxide levels initially increased, then decreased, for a net increase atmospheric carbon dioxide levels have increased atmospheric carbon dioxide levels have stayed the same Question 15 Which of the following lists is in the correct order, from smallest to largest? MacBook Air
In an automobile crash, a vehicle that was stopped at a red light is rear-ended by another vehicle. The vehicles have the same mass. If the tire marks show that the two vehicles moved after the collision at 4 m / s, what was the speed of the vehicle before the collision?
Question 5 (1 point) For activities that involve distance and time, you can improve your performance in two ways: increase the distance you cover in the same amount of time, decrease the time needed for the same distance, both, neither are correct.
Solve the following triangles- Show all work for full credit. ( 5 marks each)
A 6.2 ft tall man creates a 67° angle of elevation when he looks up to the top of a building from the ground. If he stands 20 feet from the building, how tall is the building?
2.3: Functions and Relations Question 23 of 25 (1 point) I Question Attempt: 2 of Unlimited Use the graph of y=f(x) to answer the following. Part: 0 / 8 Part 1 of 8 (a) Determine f(-4). f(-4)=□
Read this excerpt from "Mars: Landscape of the Red Planet." NASA and its European equivalent, ESA, currently have spacecraft orbiting Mars, delivering pictures and weather reports back to Earth. On January 3 and 24, 2004, NASA landed two robotic rovers named Spirit and Opportunity on the Martian surface. The twin rovers have spent the last nine years exploring Mars, taking pictures, video, and geological samples. This excerpt is most likely to appear in which part of a scientific text? introduction methods results conclusion
According to Boyle's Law, the pressure, P, of a compressed gas is inversely proportional to the volume, V, of the gas. If the pressure of a sample of gas is 20 pounds per square inch (psi) when its volume is 500 cubic inches, what is the pressure when the volume is 400 cubic inches? 25 psi 40 psi 50 psi 16 psi
A ship is moving in a straight line toward the Point Cove lighthouse. The measure of the angle of elevation from the bridge of the ship to the lighthouse beacon is 25°. Later, from a point 600 ft closer, the angle of elevation is 47°. What is the m< BOT?
A plane can fly 3952 kilometers in 3 hours. If the plane flies in cloudy skies, it can fly 184 less kilometers than usual within the same time. What is the speed for the plane flies in cloudy skies? km / h
UNIT 3- CHALLENCE 3.2: Monitoring Progress and Project Change 2-Monitoring Time IEARNING ORECTME Identity methods used by project managers when monitoring a project schedule. To dedide whether they should rtska posslble overrun, the project manager should compare the percentage of the tasks completed relative to the overall thato. - a) planned b) actual c) estimated d) highest
Mike has offered to make drinks for guests at this year's spring gala. However, he just remembered that he also needs to pick up his brother from the airport the same day. No bartender will be available until Mike arrives with his brother, making this a(i) a) resource risk b) schedule risk C) assumption risk d) deliverable risk
Use the Gauss Jordan method to solve the following system of equations. 5x - 3y + 3z = 9 5x + 2y - z = 16 15x - 4y + 5z = 34 Write the augmented matrix for the corresponding system of equations. Select the correct choice below and fill the answer boxes to complete your choice. A. C. B. [5 -3 3 9 5 2 -1 16 15 -4 5 34] D. [□ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □] Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution is (□, □, in the order x, y, z □ (Simplify your answers.) B. There is an infinite number of solutions. The solution is □, z ), where z is any real number. □ (Simplify your answers. Use integers or fractions for any numbers in the expressions.) C. There is no solution.
An angle in a rectangular coordinate system is in standard position if its vertex is at the origin and its initial side lies along the positive x-axis.
Problemas 10.- Calcular la velocidad de la rueda de salida (D) y la relación de transmisión del siguiente tren de engranajes. 11.- Calcular la relación de transmisión del siguiente tren de engranajes compuesto.
An object starts from rest and undergoes uniform acceleration. During the first second it travels 5.0 m . How far will it travel during the third second?
As shown in the diagram below, the angle of elevation from a point on the ground to the top of the tree is 34°. If the point is 20 feet from the base of the tree, what is the height of the tree, to the nearest tenth of a foot? 1) 29.7 2) 16.6 3) 13.5 4) 11.2
Starting from rest, a particle moving in a straight line has an acceleration of a=(2 t-6) m / s^2, where t is in seconds. What is the particle's velocity when t=6 s, and what is its position when t=11 s?
For the following question, fill in the blank to complete the statement. (There may be more than one correct answer.) a) If the volume of a sphere is doubled, its radius increases by a factor of . b) If the radius of a sphere is doubled, its volume increases by a factor of . c) The solution sets to f(x) ≤ c and x f(x) ≤ c are (the same/different).
What is a function of transverse tubules? Multiple Choice To transmit action potentials (impulses) into the cell interior To store calcium ions needed for activating tropomyosin To store sodium ions needed to initiate an action potential at the cell surface To connect actin to the myosin filaments
What eventually causes a release of stored energy at transform fault boundaries?
Does the random paired data below show a linear correlation? x y ------ 2 16.44 3 28.56 4 21.18 5 27.8 6 25.62 7 27.54 8 35.76 9 34.28 10 33.8 11 32.42 12 37.74 13 34.66 14 44.78 15 38.4 When in doubt, assume the original claim is There is linear correlation.
Lines A and B are parallel. Find the measure of angle a.
4 x^2+x^2 Ftext nee = 1 speed:
A spirit level can be used in the vertical or horizontal position, only in the vertical position, only in the horizontal position, in any position.
Using the image below, find the missing angle. Round to two degrees. 66.42° 1.16° 21.8° 23.58°
A runner decreases his velocity from 20 m/s to 10 m/s in 2.0 s. What was his average acceleration? a 3.2 m/s^2 b -5.0 m/s^2 c 6.3 m/s^2 d 8.0 m/s^2
What kind of a transformation, besides a translation, has been done to triangle ABC? a composition a reflection a rotation a rotation
Campo elettrico-2 1. Due cariche puntiformi, q e -4 q, sono separate da una distanza d. In quale posizione il campo elettrico risultante, da esse generato, è nullo? Risolvi ponendo q=1.0 x 10^-6 Ce d=2.0 cm Determina il campo elettrico (modulo, direzione e verso) al centro del rettangolo in figura. Risolvi ponendo q=2.00 x 10^-6 Ce a=1.00 mm
4) Per funzionare correttamente, una lampadina deve essere alimentata con 12 V . In queste condizioni dissipa 6 W di potenza. La lampadina viene collegata a una f.e.m. di 48 V ( resistenza interna trascurabile). Quanto deve valere la resistenza da collegare in serie alla lampadina?e se si collegasse una resistenza in parallelo? Avrebbe senso?
What is the length of side AB? (Lesson 4-3)
Quiz 15.6.4: Damped oscillation and the mechanical energy An object on a horizontal spring with a spring constant k is initially pulled to the right by a distance A from its equilibrium position. When let go, the object starts oscillating, and its maximum displacement from its equilibrium position is given by A(t) = A e^(-t / τ). Which of the following is the correct expression for the mechanical energy of the object-spring system as a function of time? A. E = 1/2 k(A e^(-t / τ))^2 B. E = 1/2 k A e^(-t / τ) C. E = k A e^(-t / τ) D. E = k(A e^(-t / τ))^2 E. E = 1/2 k A^2
2p^2 + p + 13 = 8
Calculate the work done by a 45 N force pushing a pencil 0.25 m. Calculate the work done by a 2.5 N force pushing a 400 g sandwich across a table 0.75 m. How far can a mother push a 20.0 kg baby carriage, using a force of 60 N, if she can only do 2500 J of work? If a small motor does 520 J of work for 10 seconds, how much power is exerted? A girl pushes her little brother on his sled with a force of 300 N for 750 m. a) How much work is done? b) How much power does she use if it takes her 200 s? c) Does the amount of work change if she uses the same force for the same distance in 150 s? d) Calculate the power doing the work in 150 s.
The young rider on a playground merry-go-round must hold on with a force of 121 N . If the rider's mass is 15.9 kg and the radius of the merry-go-round is 2.33 m , what is the speed of the rider? Hint•
State the length measurement indicated on each of the following metric rulers. RECTANGULAR SOLID MAGNESIUM RIBBON 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
The graph of y=g(x) is shown. Draw the graph of y=2g(x).
Analyzing Distance and Time The turtle's distance from his starting point is increasing between seconds. The turtle's distance from his starting point is constant between seconds. The turtle's distance from his starting point is decreasing between seconds.
Use the given information to prove that triangle DEG is congruent to triangle FGE. Statement Reason 1 Reason?
Find the length of the right triangle's hypotenuse, assuming the shorter leg has length 6 and the longer leg has length 8. True or False? (Select one answer. Using radians as needed.) sin θ = 8/sqrt(100) An approximation of the sine is not needed to answer this question. Simplify your answer (Type an integer or decimal rounded to the nearest hundredth as needed.)
Find all values of (m) so that the function (y=e^mx) is a solution of the given differential equation. (Enter (2 y''+15 y'-8 y=0) (m=)
QUESTION 5 / 10 An x-ray exposure at 50 inches (127 cm) results in a beam intensity of 200 microgray ( μGy ). What is the new intensity for an x-ray exposure at 40 inches (102 cm)? 128 μGy 160 μGy 250 μGy 312 μGy
QUESTION 3 Two small objects carry the same amount of charge, and the magnitude of the electric force exerted by one object on the other is 0.10 N when they are held 30 mm apart. If the force magnitude increases when the objects are released and free to move, are the objects of the same charge or opposite charge? Objects are of the same charge, the magnitude of the two charges does not matter. Objects are of the opposite charge, the magnitude of the two charges does not matter. Objects are of the same charge and one object has a larger magnitude. Objects are of the opposite charge and one object has a larger magnitude. Cannot be determined without more information
Exercise 11: Consider a uniformly charged disk of radius R and charge density σ, with a total charge Q lying in the xy-plane. 1- Find the electric field at a point P, located at a distance z, along the z-axis that passes through the center of the disk perpendicular to its plane. 2- What is the electric potential at a distance z from the axis? 3- From the electric potential, show that the corresponding electric field at P is exactly the result obtained early from Coulomb's law.
Evaluate (if possible) the sine, cosine, and tangent of the real number. t = (7 π)/6
Question 4 (2 points) (Slope LC) What is the slope of the line that contains the points (1,-9) and (-3,3) ? a 3 b -3 c 1/3 d -1/3
Calculate the real power and reactive power delivered to the load shown below. Zm = (10 * -j 3.77)/(10-j 3.77) = 3.
The period T (in seconds) of a pendulum is given by T=2π√(L/32), where L stands for the length (in feet) of the pendulum. If π=3.14, and the period is 9.42 seconds, what is the length? The length of the pendulum is feet.
Which is the best way to assess scientific inquiry? Select one: - Use only observation and questioning to measure how well students have understood the material on scientific inquiry. - Use observation and questioning during lessons (informal) to monitor student progress, then use the information you gained to troubleshoot problems and follow up with a standardized assessment (formal) to measure learning. - Give a test at the end of the unit to collect data on your students' concept mastery. - Give a number of small, formal tests throughout the unit.
Time a: Estimate the rise and run. rise 800 run 0.001 Compute the acceleration at time a. (Use your estimates.) 800,000 m/s^2 Time b: Estimate the rise and run. rise 0 Your value is acceptable. m/s run 0.001 s Compute the acceleration at time b. (Use your estimates.) 0 m/s^2 Time c: Estimate the rise and run. rise Your value is acceptable. m/s run × 5 Compute the acceleration at time c. (Use your estimates.)
Solve the following equation. Express your answer as an integer, simplified fraction, or decimal rounded to two decimal places. 5/12 y - 7/6 y + 4/5 = 1/4
The forward biased knee voltage in a semiconductor diode is approximately equal to the a. bias supply voltage b. breakdown voltage c. output voltage d. barrier potential
A proton that is initially at rest is accelerated through an electric potential difference of magnitude 500 V. What speed does the proton gain? 2.2 x 10^5 m/s 3.1 x 10^5 m/s 9.6 x 10^5 m/s 1.1 x 10^5 m/s
The square plates of a 3000-pF parallel-plate capacitor measure 40 mm by 40 mm and are separated by a dielectric that is 0.29 mm thick and completely fills the region between the plates. What is the dielectric constant of the dielectric? 61 56 50 45 67
Estimate the distance you can travel in 3 hours 10 minutes if you drive on average 49 miles per hour. Round your answer to the nearest mile. The estimated distance is miles.
The course for a boat race starts at point A and proceeds to the SW at 52° to point B. The boats turn to the SE to approach point C. Then, they travel 8 km due north to the finish line where they began the race. What is the m<C?
In the figure, two particles, each with mass m=0.80 kg, are fastened to each other, and to a rotation axis at 0, by two thin rods, each with length d=5.7 cm and mass M=1.1 kg. The combination rotates around the rotation axis with angular speed ω=0.28 rad / s. Measured about O, what is the combination's (a) rotational inertia and (b) kinetic energy?
The asthenosphere can be described as a layer of the Earth's interior: within the mantle that contains heat-softened, slow-flowing, but still-solid rock.
Graph the inequality. y ≤ -x - 4
Determine whether the given differential equation is exact. If it is exact, solve it. (If it is not exact, enter NOT.) x dy/dx = 3x e^x - y + 6x^2
(2) Alejandro painted a wall that is 3 yards tall and 7 yards long. This is a drawing of the wall: Partition the rectangle to show 3 rows with 7 squares in each row. Shade a composite unit made of 3 squares. Then figure out the area of the wall. How many square yards did Alejandro paint? 21 square yards (3) Explain how you found the area of the wall in Problem 2. I multiplied 7 × 3
Are these lines Intersecting?
Use a piece of scratch paper to make a sketch to show the addition of vectors D+G+B. Measuring in terms of number of boxes on the graph paper, what is the size of the RESULTANT? (How many boxes long?)
Find the slope of the line graphed below.
Find the length of the bold arc shown below. 275π/24 ft 10560π ft 64π ft 22π/3 ft
Classify each description as a hypothesis, theory, or law. Hypothesis Theory Scientists, after many experiments, explain how the temperature of a gas depends on the energy of its molecules. Law Answer Bank A description that predicts what happens, but does not explain how. An explanation that has been tested and verified.
Find the graph of this function as the value of n increases, starting from n=1. f(n)=(5/16+11/12 i)^n
How are computers used in producing weather forecasts? They compile data from multiple instruments. They collect air temperature and air pressure data. They eliminate the need for human meteorologists. They transmit data on developing weather systems from space.
An engineer is designing a spring to be placed at the bottom of an elevator shaft. If the elevator cable should break when the elevator is at a height h above the top of the spring, calculate the value that the spring stiffness constant (k) should have so that passengers undergo an Let M be the total mass of the elevator and passengers. mg(h+x)=1 / 2 k x^2 F=k x=m cdot a k x=m cdot g mg(h+(mg/k))=1 / 2 k(mg/k)^2
This mere to the deander of the arber visuble whreugh the unses. As mannification increases, the field of vew decrie
Two identical tiny conducing spheres, both initially having no charge, are brought into contact and given a total charge of 5.00 × 10^4 electrons. The spheres are then pulled apart until their centers are 12.0 cm apart. Assume the total number of electrons on the spheres remained the same as they were separated. a) What is the magnitude of the force that each sphere exerts on the other? b) Is the force attractive or repulsive?
Consider the position function s(t)=-16 t^2+100 t representing the position of an object moving vertically along a line. Sketch a graph of s with the secant line passing through (0.25, s(0.25)) and ( 3, s(3) ). Determine the slope of the secant line and explain its relationship to the moving object. Sketch the graph of s with the secant line. Choose the correct graph below. A. B. C. The slope of the secant line is msec= (Type an integer or a decimal.)
(4 × 10^7) × (3 × 10^8) =
An electrical power station uses 1.33 x 10^14 J of thermal energy input and produces electricity with an efficiency of 37.7%. (a) How much electrical energy is produced? J (b) How much waste energy is produced by the station? HINT: The waste energy is the thermal energy that doesn't result in the production of electricity. J (c) What is the ratio of waste energy to electrical energy output? Please pause for a few seconds to think about whether it's better for this number to be large or small.
To indirectly measure the distance across a river, Fatoumata stands on one side of the river and uses sight-lines to a landmark on the opposite bank. Fatoumata draws the diagram below to show the lengths and angles that she measured. Find PR, the distance across the river. Round your answer to the nearest foot.
Explain how to use a number line to find the opposites of the integers that are 4 units away from -6. Enter the correct answers in the boxes. First, count units away from in both directions and identify the two numbers. Then, find the numbers that are the same distance from as the two numbers, but on opposite sides of 0 .
What is the length of the hypotenuse? If necessary, round to the nearest tenth. c= inches
F3=400 N vecR-vecF1+vecF2+vecF3 R2=Fr y+F2 y+F3 y=(300 N)left(sin 45^circright)+(200)left(33^circright)+(1001)left(cos 30^circright) Which (if any) terms are missing negative signs here? (check all that apply) F1x F2x F3x F1y F2y F3y
An oceanographer claims that the mean dive duration of a North Atlantic right whale is 11.3 minutes. A random sample of 36 dive durations has a mean of 12.4 minutes and a standard deviation of 2.1 minutes. At α=0.10 is there enough evidence to reject the oceanographer's claim? Complete parts (a) through (d) below. Assume the population is normally distributed. (a) Identify the claim and state H0 and Ha. H0: μ = 11.3 Ha: μ ≠ 11.3 (Type integers or decimals. Do not round.) The claim is the hypothesis. (b) Use technology to Find the standardized test statistic, t t= (Round to two decimals.) (c) Obtain the P-value P= (Round to three decimal places as needed.) (d) Decide whether to reject or fail to reject the null hypothesis. H0 because the P-value greater than α. (e) Interpret the decision in the context of the original claim. There enough evidence at the % level of significance to the claim that the mean dive duration of a North Atlantic right whale is minutes.
The position of a 50 g oscillating mass is given by x(t)=(2.0 cm) cos (10 t-π / 4), where t is in s. If necessary, round your answers to three significant figures. Determine: Part A The amplitude. Express your answer with the appropriate units. Value Units Submit Request Answer Part B The period. Express your answer with the appropriate units. Units Submit Request Answer Part C The spring constant. Express your answer with the appropriate units.
Find the angle between the vectors. (First find an exact expression and then approximate to the nearest degree.) a=⟨2,3⟩, b=⟨4,-1⟩ exact approximate
A particle of mass 3 kg is projected at an initial speed of 10 ms^-1 in the horizontal direction. As it travels, it meets a constant resistance of magnitude 6 N. Calculate the deceleration of the particle and the distance travelled by the time it comes to rest.
From the top of a sphere of radius r a point mass m glides smoothly down (no friction). At what height does it detach itself from the surface of the sphere? Hint: the component of the gravitational force pointing towards the center of the sphere acts as centripetal force which is mv^2 / r for a circular path with radius r and velocity v. Furthermore, potential energy is transformed into kinetic energy. Combining these two conditions leads to the solution.
Classify the statement as either true or false. lim x → 5 9=9 Choose the correct answer below. false true
Determine the time (in seconds) required for a train to travel 1 [km] along its rails if the train starts from rest, reaches a maximum speed at some intermediate point, and then stops at the end of the road. The train can accelerate at 1.5 [m /(s^2)] and decelerate at 2[m /(s^2)].
4. In each case, a student is holding a nearly massless wooden stick horizontally. Each stick has one mass attached at the halfway mark and another mass at the far-end of the stick. The sticks are identical, and the specific values and locations are given in the figures. Is the magnitude of the torque exerted by the student greater in Case A, greater in Case B, or the same in both cases? Explain your reasoning.
A student pulls a cart across the floor with a force of 10 N . If the cart travels 3 m , how much work does the student do on the cart? Round your answer to the nearest whole number. Please do not include units with your answer.
Follow the steps for graphing a rational function to graph the function R(x) = x^2 / (x^2 + x - 20). (Type an equation. Use integers or fractions for any numbers in the equation.) B. The function has two horizontal asymptotes. The top asymptote is , and the bottom asymptote is . (Type equations. Use integers or fractions for any numbers in the equations.) C. There is no horizontal asymptote. Determine the oblique asymptote(s), if one exists. Select the correct choice below and, if necessary, fill in the answer box(es) within your choice. A. The function has one oblique asymptote, (Type an equation. Use integers or fractions for any numbers in the equation.) B. The function has two oblique asymptotes. The oblique asymptote with a negative slope is , and the oblique asymptote with a positive slope is (Type equations. Use integers or fractions for any numbers in the equations.) C. There is no oblique asymptote. Determine the points, if any, at which the graph of R intersects the horizontal or oblique asymptote, if one exists. Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The graph of R intersects the horizontal or oblique asymptote at . (Simplify your answer. Type an ordered pair. Use a comma to separate answers as needed.) B. There is no point at which the graph of R intersects the horizontal or oblique asymptote. C. There is no horizontal or oblique asymptote.
Find an equation, in terms of x and y, for the parabola conic whose graph is shown.
Question 6 (1 point) A single-loop solenoid creates this magnetic field: Which image below shows the correct direction of the conventional current in
After flying his kite at the beach all day, Bernard wound up the kite's string to get ready to go home. As he wound the string, the kite's height decreased. This situation can be modeled as a linear relationship. What does the slope of the line tell you about the situation? The kite's height decreased 5 feet per minute. The kite's height decreased 15 feet per minute. The kite's height decreased 30 feet per minute.
Which nuclear equation is an example of positron emission? Multiple Choice - 87^221 Fr → 85^217 At+ - 13^27 Al + 2^4 He → 15^30 O - 8^15 O → 7^15 N+ - 62^235 U + On → 52^13 Te + 40^7 Zr - 93^239 Np → 94^239 Pu
In a boxplot, if the median is to the left of the center of the box and the right whisker is substantially longer than the left whisker, the distribution is skewed
The figure shows a rectangular box in three-dimensional space that contains several vectors. (The vector c is in the xz-plane, and the vector e is in the xy-plane.) Are the following statements true or false? 1. d = g - c 2. g = f + a 3. a = -b 4. c = f 5. a = d 6. e = a - b
The weight of an organ in adult males has a bell-shaped distribution with a mean of 320 grams and a standard deviation of 20 grams. Use the empirical rule to determine the following. (a) About 99.7% of organs will be between what weights? (b) What percentage of organs weighs between 300 grams and 340 grams? (c) What percentage of organs weighs less than 300 grams or more than 340 grams? (d) What percentage of organs weighs between 300 grams and 380 grams? (a) and grams (Use ascending order.)
A sample of gas has a volume of 423 mL at a pressure of 3.77 atm. The gas is compressed and now has a pressure of 8.46 atm. Predict whether the new volume is greater or less than the initial volume, and calculate the new volume. Assume temperature is constant and no gas escaped from the container. New volume larger or smaller? New volume = mL
How much work is required to empty the full tank shown below by pumping water up and over the top edge? Hint: Density of water = 62.4 lb / ft^3. W=[?] ft-lb Round your answer to the nearest whole number
A logo is an example of a metaphor. symbol. anachronism. simile.
For the following right triangle, find the side length x. Round your answer to the nearest hundredth.