Calculate the specific gravity of a pure gold nugget (ρ = 19.3 g/cm3)

a)1.00
b)18.3
c)19.3
d)cannot be determined

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

An athlete is holding 24 lb of weights at a height of 6 inches above the stack as shown. to lower the weights, she applies a constant force of 5 lb to the handle. determine the velocity of the weights immediately before they hit the stack.