<span>D transformed into gravitational potential energy.</span>
Answer:21km
Explanation:13km+8km=21km
Answer: 
Explanation:
Mary applies a force of 73 N to create an acceleration of 
When She increases force to 84 N, it creates an acceleration of 
Friction opposes the motion of box

Subtract (i) from (ii)

Therefore friction is

Here, friction is kinetic friction which is given by

Visibly you can see that the two copper are different sizes so the mass and volume are different. No information is given about the temperature but they are side by side so you can assume they're both room temp. The density is a ratio of mass per volume. The density will remain the same unless the two are different purities or physical states.
Yes it depend course you throw the stone at the roof it can't came course it in the roof