A crane uses a system of pulleys with a mechanical advantage of 27. An input force of 8650 N is used to lift a pile of steel beams. What is the weight of the girders? ( show all work )
( do it very well and ill mark you brainlist )

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

John throws .4 kg ball with velocity of 18 m/s. hits .2 kg bottle and bottle flies 25 m/s. how fast is ball traveling after hitting the bottle?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.