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3 years ago

HELP!

Physics

1 answer:

igor_vitrenko [27]3 years ago

7 0

Answer:

1) Option D

2) Option D

3) Option C

Explanation:

1) Kinetic energy $=\frac{1}{2} mv^2$

m = 500 kg

v = 10 m/s

Kinetic energy $=\frac{1}{2} *500*10^2=25000 J$

Option D is the correct answer.

2) Potential energy = mgh

m = 25 kg

g = 10 m/s²

h = 42 m

Potential energy = 25 * 10 * 42 = 10500 J

Option D is the correct answer.

3) Thermal equilibrium means no heat flow from each other two systems, that is achieved when both systems have same temperature.

Option C is the correct answer.

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