Because of friction, rotational kinetic energy is not conserved while the disks' surfaces slip over each other. what is the final rotational kinetic energy, kf, of the two spinning disks? express the final kinetic energy in terms of it, ir, and the initial kinetic energy ki of the two-disk system. no angular velocities should appear in your answer.

Apassenger walks toward the rear of a moving train. describe her motion as seen from a reference point on the train. then describe it from a reference point on the ground

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work