Answer:
See Explanation
Explanation:
The principle of conservation of energy states that; energy can neither be created nor destroyed but is converted from one form to another.
In view of this principle, Ella can not be correct when she says that a lot of energy has disappeared. The use of the term "disappeared" connotes the idea that the energy no longer exists which does not happen.
Hence, energy can not "disappear" from hot water rather the energy in the water may be transferred to the surroundings.
photons and convection - density differences makes bubbles of hot stuff float up. pretty sure
This depends on the original mass of the object having its mass doubled and the the original distance before the distance was tripled.
Explanation:
potential energy= mgh
30 × 10 × 30 = 9000J or 9KJ
