"Rubble pile" asteroids have low average densities due to being up to 50% empty space inside. True
False

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.