A lever is used to pry the lid off of a wooden crate. The worker applies 1150 J of work to the lever, and the lever does 850 J of work to the lid. Calculate the efficiency of the lever.

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 .

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000