A student drops a rock from rest at a distance h above the ground such that the rock hits the ground at time to. At what distance above the ground should the rock be dropped such that it hits the ground at a time 21, after it is released from rest?

Apersons beliefs and general outlook, which act like filters on the information they receive are called ?

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?