Assume that the North American continent can be represented by a slab of rock 6000 km on a side and 35 km deep and that the rock
has an average mass density of 2790 kg/m3
.
The continent is moving at the rate of about
1.2 cm/year.
What is the mass of the continent?

After a big snowfall, you take your favorite rocket-powered sled out to a wide field. the field is 195 m across, and you know that your sled accelerates at a rate of 3.65 m/s2 when the rocket is on. how much time will it take the sled to cross the field starting from rest, assuming the rocket is on the whole time?

Which process is represented by the pv diagram? a. the isobaric process b. the isovolumetric process c. the isothermal process d. the adiabatic process

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?