There is an equation for calcualting the gravitationl potential energy. Eg=m* g* h. (Eg is energy, mis massis gravitational fieldand his height.) On earth g = 10 Nkg, a 25kg balland I want it to have a gravitational potential energy of 1750. how high do have to lift it Plz answer

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?

Notice how they put future which of the clouds shown would indicate a possible future rain storm? a) b) c) d)

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve