Two 3 kg balls move away from each other, one traveling 4 m/s to the right, the other
7 m/s to the left.
What is the magnitude of the total momen-
tum of the systems?

Calculate the heat capacity per object when the total energy is 4 quanta. (think of this in terms of increasing from 3.5 quanta of energy in the system to 4.5 quanta of energy in the system, if that were possible.) c4 = __ j/k/object

True or false graphs must include scales that increase by the same amount

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.