A2000 kg car is moving at 15 m/sec when it collides with a 1200 kg car sitting still. briefly compare the impulse imparted on the 1200 kg car by the 2000 kg car to the impulse imparted on the 2000 kg car by the 1200 kg car. which car undergoes the greater change in momentum? briefly explain your response.

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?

Arrange the images in order to show how lake-effect snow occurs.

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?