Which of the following is the most appropriate unit to describe the time you can drive a car based on the amount of gas?

minutes per gallon, because the independent quantity is the gallons

minutes per gallon, because the independent quantity is the minutes

gallons per minute, because the independent quantity is the gallons

gallons per minute, because the independent quantity is the minutes

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?