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(A) fission (B) fusion (C) combustionIn order for work to be done (A) kinetic energy must be changed to potential energy (B) potential energy must be changed to kinetic energy (C) a machine must be used.According to Einstein's theory of relativity, energy is related to which of the following? (A) force (B) mass (C) weightI couldn't figure out the answers to these 3, thanks in advance!
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