POSSIBLE POINTS: 1.92 When the heater stopped working in a hair dryer, the fan stopped working
as well. Which of the following is the most likely explanation?
They were connected in a series circuit
They were connected in a parallel circuit.
They were no longer connected to the switch
They developed a short circuit
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A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?