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Nata [24]
3 years ago
14

What is the kentic energy of a 2 kg ball as it falls half way from a 40 meter tall building

Chemistry
1 answer:
Len [333]3 years ago
8 0

Answer:

392

Explanation:

According to the law of conservation of energy, energy cannot vanish,so the lost potential energy must be converted into another form of energy (in this case, Kinetic Energy).

(mass*g*height)-(mass*g*halfway height)=(2*9.8*40)-(2*9.8*20)

784-392=392

This makes sense because since the rock has fallen halfway, half of its potential energy has become kinetic energy. Once the rock reaches a height of 0 Meter, all of its potential energy will be kinetic energy.

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Methanol is the simplest alcohol. How are larger alcohol molecules formed?
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Explanation:

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what is the best course of action if solid material remains in the flask after the heating step of recrystallization
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