The combination of an applied force and a friction force produces a constant total torque of 36.2 n · m on a wheel rotating about a fixed axis. the applied force acts for 6.20 s. during this time, the angular speed of the wheel increases from 0 to 10.4 rad/s. the applied force is then removed, and the wheel comes to rest in 59.8 s.
(a) find the moment of inertia of the wheel.
(b) find the magnitude of the torque due to friction.
(c) find the total number of revolutions of the wheel during the entire interval of 66.5 s.

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

When using two-wire cable to feed a 240-v appliance that does not require a neutral wire, you should a. mark both ends of the white wire green. b. use the cable as is. c. use only the black wire. d. mark both ends and any exposed area of the white wire black.

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z