Does anyone know the definition of conservation of energy is?? i?

Question

i know it cannot be created or destroyed so dont tell me that , im stressing over this!! so please help!!

Answer 1

the definition for the conservation of energy is simple it means that saving of electricity by not conserving more of the light, more of power for electronics.

Answer 2

change a light bulb to a spaghetti light bulb is not going to change anything

Answer 3

If you don't mean the first law of thermodynamics then what do you mean?

If you mean conserving energy such as turning out the light behind you when you leave an empty room, that's a different matter but you need to be more specific.

Answer 4

It's a natural law ... the "law" of conservation of energy.  Energy is neither created nor destroyed it is transferred and can change form.  It is sometimes so dissipated that it seems to be gone but really you can think of it as just spread out very thinly.

The natural laws apply to our use of energy in our home as in the example above:  Energy turns some generator to convert it to electric and then you can choose to convert it to light or let it go on to do something else, elsewhere.  The conversion cost us our money and maybe has environmental consequences you'd want to consider.  So; we say we "conserve" energy by not lighting lights we don't need.

Answer 5

In general use, it means we turn off devices that consume the energy we generate from fossil fuels, from nuclear or other means.  We 'conserve' by using less.

In kinetic terms, it means that for every action there is an equal and opposite reaction.  Energy expended must be generated by action elsewhere.

On a broader level, energy has been converted to matter ever since the Big Bang.  The original Big Bang energy release is all around us in various forms.  None of it vanishes.

According to my cat, it means sleeping in between meal and treat times.

Answer 6

See the Wikipedia link for a good summary, if slightly confused.  This sentence is probably the one to take home:

"In short, the law of conservation of energy states that energy can not be created or destroyed, it can only be changed from one form to another."

Yes, that's what you said not to say.  But I can't help it if that's what it is.

What does it mean in practice?  If you put energy into a closed system (electricity, gamma rays, light from a flashlight) it remains there.  It will eventually be converted to heat (Second Law of Thermodynamics), but energy doesn't just appear or disappear.