Explain why there is a difference in the horsepower developed in walking and running up the flight of stairs.

At what point the certain object feels zero garvitational force between earth and the moon. take the required information from the book.required: distance away from earth or moon

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

25pts the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?