A student drops a rock from rest at distance h above the ground such that the rock hits the ground at time t . At what distance above the ground should a rug be dropped such that it hits the ground at time 2t after it is released from rest?

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Agas expands from an initial volume of 0.040 m^3 and an initial pressure of 210 kpa to a final volume of 0.065 m^3 while its temperature is kept constant. how much work is done by the system?

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?