Need asap what is the velocity of an car that travels 50 miles north, turns around and travels 50 miles south, in 5 hours? question 6 options: 5 mph south 2 mph south 0 25 mph north

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

No copying 15 pts how does a free-body diagram tell you about the net force on an object?

Athe top of a hill, an athlete on a skateboard has x joules of mechanical energy. how much mechanical energy will she have at the bottom of the hill? ignore the effects of friction.