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Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 8.0 s, it rotates 50 rad. (a) What was the angular acceleration during this time? (in radians/sec^2) (b) What was the average angular velocity? (in radians/sec) (c) What is the instantaneous angular velocity of the disk at the end of the 8.0 s? (in radians/sec) (d) Assuming that the acceleration does not change, through what additional angle will the disk turn during the next 4.0 s? (in radians)
A very thin sheet of glass (n=1.5) floats on the surface of water (n=1.33). When illuminated with white light at normal incidence, What is the thickness of the glass
A child and sled with a combined mass of 49.20 kg slide down a frictionless hill that is 7.38 m high. If the sled starts from rest, what is its speed at the bottom of hill.
The power output of a cyclist moving at a constant speed of 4.8 m/s on a level road is 140 W. What is the force exerted on the cyclist and the bicycle
suppose the temperature of the cosmic background were 1.3 k. what would be the wavelength of maximum intensity? what
Calculate the theoretical resolution (assuming no lens aberrations) for green light
A nuclear power plant generates 2000 MW of heat energy from nuclear reactions in the reactor's core. What is the plant's actual efficiency
A hot-air balloon plus cargo has a mass of 1740kg and a volume of 11730m3. What is the density of the hot air in the balloon
A car moving at 15 m/s skids to a stop in 20 m. If the cartravels at 45m/s , how far will skid, assuming the same constantbraking force? Calculate the kinetic energy of the earth as it makes onrevolution around the sun.
A 10 gauge copper wire carries a current of 24 A. Assuming one free electron per copper atom, calculate the magnitude of the drift velocity of the electrons
What is magnitude of induced emf between the ends of beam
batted straight back to Lonnie with a return speed of 60 m/s. If the bat is in contact with the ball for .050 s, illustrate what is the impulse experienced by the ball.
questiona known toy consists of an aligned row of identical steel balls that are suspended bynbspmono?lament so they
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