In the picture below, a doctor is having a video conference with a patient. What might be a positive effect of the technology being
used?

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical

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.