If the universe is expanding, what is outside? if there is nothing outside it, how does it expand to create void?

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 .

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue