8. a package was determined to have a mass of 5.7 kilograms. what's the force of gravity acting on the package on earth?

56 N

Explanation:

Weight is equal to mass times the acceleration of gravity.  On earth, that's 9.8 m/s².

W = mg

W = (5.7 kg) (9.8 m/s²)

W = 55.86 N

Since the mass is precise to 2 significant figures, we should round our answer to 2 significant figures: W = 56 N.

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .