Four planets that formed at the same time have equal density and the following radii: planet w: 2,000 km planet x: 2,500 km planet y: 2,700 km planet z: 5,000 km ignoring any other factors, which planet would be expected to cool fastest?

Which of the following represents an upright image? a. -do b. +m c. -m d. +do

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)