Because one object can have more things in it. I learned it a t school today.
My opinion is that energy is not something that's made just like u feed ur self and u have energy u have to feed the earth and it will survive
it would be a chain reaction and a wave
21. light changes its direction when travelling through a new medium because denser mediums have a higher angle of refraction.
It's the energy your body spends to just keep you breathing and your heart beating ... just being alive, without trying to DO anything.