How do simple machines make work easier?
they increase the distance of applied forces.
they change the strangth or direction of a force.
o they add energy to the work.
o
they reduce the speed of work.

They increases the distance of applied force(torque)as well as they change the strenght or direction of a force(90 angle work).

Explanation:

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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