How can a heavy moving van have the same momentum as a small motorcycle?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

If you put a helium-filled balloon in the refrigerator, what will happen?

Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?