120 J of work was done to lift an object 6 m above the ground. How much force was applied to this object and what was its mass?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

An atom that has gained or lost electrons is called an _

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.