Answer:
reactants --> products + thermal energy
Explanation:
Heat is absorbed in endothermic reaction.
Answer:
The answer is already given... it's 31.25 cm
It must have a medium. It must travel in empty space. Mechanical waves are waves which needs medium of propogation.
Answer:
Protons and neutrons are all attracted to each other as a result - the strong nuclear force. This is an attractive force that only has an effect over a very short range in the nucleus.
When the object is at the top of the hill it has the most potential energy. If it is sitting still, it has no kinetic energy. As the object begins to roll down the hill, it loses potential energy, but gains kinetic energy. The potential energy of the position of the object at the top of the hill is getting converted into kinetic energy. Hope this helped. :)