If the slight resistance you feel from a light switch (when you flick it) is the
reaction force, what is the action force?
OA) flicking the switch
OB) the light turning on
OC) friction between your finger and the switch
OD) the switch moving from the "off" to the "on" position

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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