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Alecsey [184]
2 years ago
8

Which of these actions requires KINETIC Energy? Choose all of the correct answers.

Physics
2 answers:
Keith_Richards [23]2 years ago
8 0

Answer:

turning a doorknob

Explanation:

it will snap back once you release it.

Harman [31]2 years ago
7 0

Answer:

- Turning a doorknob

- Swimming

- Hitting a tennis ball

Explanation:

Kinetic energy is the form of energy that an object or a particle has due to its motion (horizontal or vertical). An object gains kinetic energy when work is performed on it by putting a net force. This makes the object to speed up and acquire kinetic energy. Any object or particle that is moving is using kinetic energy

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If a wave had a wave speed of 1000 m/s and a frequency of 500 Hz, what is its wavelength?
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3 years ago
If a train is 100 kilometers away, how much sooner would you hear the train coming by listening to the rails (iron) as opposed t
Whitepunk [10]
From tables, the speed of sound at 0°C is approximately
V₁ = 331 m/s (in air)
V₃ = 5130 m/s (in iron)

Distance traveled is
d = 100 km = 10⁵ m

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Time required to travel in iron is
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The difference in time is
302.12 - 19.49 = 282.63 s

Answer:  283 s (nearest second)



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