Which is the best estimate for the mass of a typical lineman on a high school football team 1. 100,000 g
2. 100,000 kg
3. 100,000 mg

What happens to an isotope during radioactive decay?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?

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.