NO NON USEFUL ANSWERS OR LINKS What is the trade off between the input and output forces when someone uses a screw?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?

The law of reflection states that the angle of reflection is equal to the angle of

It takes a lot of energy to get the temperature of water to increase and eventually boil because water has a high heat.