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VashaNatasha [74]
3 years ago
13

Someone please help me!! See PDF to help

Physics
2 answers:
vaieri [72.5K]3 years ago
8 0

Explanation:

They are invisible is the answer.

Mama L [17]3 years ago
5 0

Answer:

They are invisible!

Explanation:

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A ball having a weight of 1.5 N is dropped from a height of 4 meters. (Neglect air friction.) How much mechanical energy is "los
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As this mechanical energy is associated with height, it would be "Potential Energy" in particular.

U = mgh
U = F.h
U = 1.5 * 4
U = 6 Joules

So, 6 J of energy is lost before it hits the ground.

Hope this helps!
4 0
4 years ago
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How does the temperature of water affect the speed of the sound waves?
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Answer:

Temperature is also a condition that affects the speed of sound. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly.

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3 years ago
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<u>Very low</u>

<u>Explanation:</u>

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3 years ago
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Momentum is mass times velocity so just do 750•24.
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