Mass/energy equivalence is expressed mathematically in which of the following expressions? a. E=hf
b. E=mc
c. E= 1/2 mv^2
d. E=mc^2

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energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

i believe the answer is a hope it and is correct

i think the answer is a and b

i wish you luck