Aman of mass 50kg ascends a flight of stairs 5m high in 5 seconds. if acceleration due to gravity is 10ms-2, the power expended is

What must be the same for any two resistors that are connected in series ? a. the potntial diffrence across each b. the rate at which charge moves through each c. the rate at which energy is used by each d. the resistance to the flow of charge of each

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.