Question

What does the Law of Conservation of Energy tell us?

Answer 1

It tells us that energy can not be made or destroyed.

Answer 2

In a closed system. Energy CAN be made or destroyed in an open system, because, you know, if I have a basket of five apples, and I put in another apple, I'll have six apples.

Answer 3

Universally?

Answer 4

The Universe is a closed system, IIRC.

Answer 5

It better be.

Answer 6

But then black hole thermodynamics, which I don't know much about.

Answer 7

BUGGER

Answer 8

How about in an 'isolated system'? :D

Answer 9

Better.

Answer 10

it states that energy can neither be created nor destroyed but remains constant through out a process, however tranformation of energy can take place but for an isolated body energy always remains conserved/.