a 10k-g rock and 20k-g rock are dropped from the same height and experience no significant air resistance. If it takes 20 k-g rock a time T to reach the ground, what time will it take the 10k-g rock to reach the ground

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 .

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.

the answer is b, have negligible mass