Abar of metal had a volume of 4.5 cm^3 and a mass of 33 g. what is the density of the metal?

a) 14.9 g/cm^3
b) 1.4 g/cm^3
c) 28.5 g/cm^3
d) 7.3 g/cm^3

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

Which explanation most accurately describes convection within the ocean

Which statement is true? a) the work done to lift an object 6 meters is greater than the gravitational potential energy it gains. b) the work required to push an object is less than the work required to pull an object the same distance. c) the work required to raise an object to a height is equal to the gravitational potential energy the object gains. d) the work done against gravity to lift an object straight up is greater than the work required to roll it up a ramp.