MacGyver is riding on a skateboard and moving west with a velocity of 7 m/s. MacGyver has a mass of 92 kg and the skateboard has a mass of 8 kg. If MacGyver jumps off the skateboard at a velocity of 2 m/s east, what will the final velocity of the skateboard be? Show your work.

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly