Energy Smart

~Fefi~ asked:


How are the laws of conservation of momentum and energy similar?

Here are the formulas:

Law of conservation of momentum:

P1 + P2= P1′ P2′

m1 v2 + m2 v2 = m1′ v1′ + m2′ v2′

Law of conservation of Energy:

KEi + PEi = KEf + PEf
I think that the energy can’t be created nor distroyed but it can be transformed from one form to another.
But is that the similarity???

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ljean_2363 asked:


Jupiter, Saturn, and Neptune all radiate more energy into space then they receive from the Sun.

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Brian M asked:


I know the conservation of energy can be violated for short times, but not overall. is that right?

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Peter Griffin asked:


I understand that energy is converted from one form to another and that the law of conservation of energy states that energy is not created or destroyed. However, I do not understand how energy is conserved if it seems to eventually dissipate. For example, when a top spins kinetic energy is not lost because it is transformed into thermal energy due to friction. When the top eventually stops and when the ground cools and everything seems to have reverted back to what it was before, how is energy still conserved?

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mahl@rogers.com asked:


How can you use physical laws and principles to help analyse a problem with sports? For example, explain the importance of the initial kinetic energy of a pole vaulter or high jumper.
I just need to be able to describe ALL the laws and principles of energy relating to any ONE given sport.

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?uestlove. asked:


How do step up transformers obey the law of conservation of energy?

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luv2cheer asked:


1. The law of conservation of energy states that energy is neither created nor destroyed. What does this mean?

2. Why is the conservation of energy so important?

Please Help!!!

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Scooby Snacks asked:


How does the law of conservation of energy apply to the burning of coal?
You kind of have to think about this…

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maria farina elaine c asked:


then is there an end point to where will all the energy be transformed..? is the sun only the source of energy why we are living here?

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tha_most_unknowns asked:


Much discussion has focused on the need to drive more efficient cars and use less electricity. If the law of Conservation is true, why are people concerned about energy uasge?

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