What is true about current?
check all that apply

a. it is measured in ohms.

b. it is related to voltage and resistance by ohm's law.

c. it is the excess accumulation of electric charge.
d. it is measured in amps.
e. it is the flow of electric 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.

Calculate a pendulums frequency of oscillation (in hz) if the pendulum completes one cycle in 0.5s.

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