Rubbing your hands against each other can make them hot. the faster you rub, the hotter they are. which of the following statements is/are correct? (1)the molecules of the hands have zero total kinetic energy because they vibrate about fixed positions. (2)the work done against friction between the hands is converted into the internal energy of the hands. (3)the temperature of the hands is directly proporti9nal to the kinetic energy of the hands.

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

Notice how they put future which of the clouds shown would indicate a possible future rain storm? a) b) c) d)

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.