If a 65kg skydiver jumps out of an airplane at a height of 1200m, what is the fastest they could be traveling when they reach a height of 400m? At that height, they are falling at a speed of 53m/s. How much energy did they transfer to air molecules?

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.