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Old 10-29-2018, 05:08 AM
aljhoa aljhoa is offline
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Join Date: Aug 2007
Posts: 2,261
Originally Posted by bistander View Post
To ricards and all,

Here is a good article about the definition of energy.

What is energy? As best as we know it, energy cannot exist independently of particles or systems of particles.
(Even gravitational waves are made of theoretical particles known as gravitons, just as electromagnetic waves are made of photons.)
Energy comes in a variety of forms: some fundamental and some derived.

Gyroscopic Primer by Prof Eric Laithwaite Full Video @ 44:37

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