Quote: we do not know what energy is; energy is just a calculated number that is always the same for a given system

Quotation Skeleton

It is important to realize that in physics … energy comes in little blobs of a definite … [such as 'kinetic energy' or 'elastic energy'], and when we add it all together it gives "28"--always … [i.e., energy is conserved]. It is an abstract thing in that it does not … [so energy is a number, cbb]   Google-1   Google-2

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