Two buckets of mass m1 = 18.7 kg and m2 = 13.9 kg are attached to the ends of a massless rope, which passes over a pulley with a mass of mp = 7.93 kg and a radius of rp = 0.350 m. assume that the rope does not slip on the pulley, and that the pulley rotates without friction. the buckets are released from rest, and begin to move. if the larger bucket is a distance d0 = 1.55 m above the ground when it is released, with what speed v will it hit the ground?

30 points - 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

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Another word for electromagnetic energy is a. heat b. force c. matter d. radiation