Which of the following is an example of kinetic energy? A. the rapid movement of molecules in the air

B. a parked car in a hot garage

C. a large boulder precariously resting on a cliff's edge

A.the rapid movement of molecules in the air

B. a parked car in a hot garage

C.a large boulder precariously resting on a cliff's edge

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

answer: 45

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