Questions: 15. When you let water into a bathtub, what kind of machine helps you open the tap?

Transcript text: 15. When you let water into a bathtub, what kind of machine helps you open the tap?

Solution

Solution Steps

Step 1: Identify the Type of Machine

The question asks about the type of machine that helps open a tap when letting water into a bathtub. In mechanical terms, a machine is a device that helps perform work by changing the magnitude or direction of a force.

Step 2: Determine the Simple Machine Involved

A tap or faucet typically uses a simple machine to control the flow of water. The most common simple machine used in this context is a "wheel and axle." When you turn the handle of a tap, you are using a wheel and axle mechanism to open or close the valve, allowing water to flow.

Final Answer

The machine that helps you open the tap is a \(\boxed{\text{wheel and axle}}\).

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