Suppose you warm up 510 grams of water (about half a liter, or about a pint) on a stove, and while this is happerning, you also stir the water with a beater, doing 6 x 104 j of work on the water. after the large-scale motion of the water has dissipated away, the temperature of the water is observed to have risen from 18°c to 82°c

part 1 (a) what was the change in the thermal energy of the water? aethermal = the tolerance is +/-5% attempts: 0 of 10 used *

part 2 (b) taking the water as the system, how much energy transfer due to a temperature difference (microscopic work) q was there across the system boundary? j the tolerance is +/-5% attempts: 0 of 10 used

part 3 (c) taking the water as the system, what was the energy change of the surroundings? aesurtoundings the tolerance is +/-5% attempts: 0 of 10 used

Dinate system, and a charge q = - 2.00 nc is placed s2 10 n> c. (a) what is the change in electric potential energy when the dipole moment of a molecule changes its orientation with respect to es from parallel to perpendicular? (b) at what absolute temperature t is the average translational kinetic energy 32 kt of a molecule equal to the change in potential energy calculated in part(: abovethistemperature,thermalagitationprevents the dipoles from aligning with the electric field.) placed in a uniform electric field e with magnitude 1.6 * 6 on the positive x-axis at x = 4.00 cm. (a) if a third charge q3 = +6.00 nc is now placed at the point x = 4.00 cm, y = 3.00 cm, find the x- and y-components of the total force exerted on this charge by the other two. (b) find the magnitude and direction of figure p21.62 ll uu 21.55 . torque on a dipole. an electric dipole with dipole moment ps is in a uniform external electric field es. (a) find the orientations of the dipole for which the torque on the dipole is zero. (b) which of the orientations in part (a) is stable, and which is unstable? (hint: consider a small rotation away from the equi- librium position and see what happens.) (c) show that for the stable orientation in part (b), the dipole’s own electric field tends to oppose the external field. 21.62 ..

Acrow drops a 0.11kg clam onto a rocky beach from a height of 9.8m. what is the kinetic energy of the clam when it is 5.0m above the ground? what is its speed at that point?

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?