Aseries circuit contains two devices, one with a resistance of 10 ohms and one with a resistance of 4 ohms. if the generator supplies a voltage of 42 v, what is the magnitude of the current?

What object a collides with object b and bounces back its final momentum is?

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?

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match