If a meter stick moves to your right at a constant velocity of 0.8 c, what would you measure its length to be

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

Atomic nuclei of almost all elements consist of

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.