Two uncharged spheres are separated by 2.00 m. If 3.50 3 1012 electrons are removed from one sphere and placed on the other, determine the magnitude of the Coulomb force on one of the spheres, treating the spheres as point charges.

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.

If one object has a large redshift and another object has a small redshift, what can we conclude about these two objects?

If we compare and contrast the three seen in the jar , the best explanation would be that