A 150 g baseball is thrown toward home plate with a speed of 30 m/s. The batter hits the ball directly back at the pitcher with a speed of 40 m/s. What is the change in momentum of the ball

What happens to light waves from a star as the star moves away from earth?

What happens in a global convection cell

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)