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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)
In a pool game, the cue ball, which has an initial speed of 5.0 m/s, make an elastic collision with the eight ball, which is initially at rest. Find the direction of motion of the cue ball after the collision
A solenoid is designed to produce a magnetic field of 2.50×10?2T at its center. It has a radius of 1.60cm and a length of 31.0cm , What total length of wire is required
the piston of a hydraulic automobile lift is 0.330m in diameter.part a what gauge pressure in pascals is required to
A diver springsupward from a board that is three meters above water. At an instanthe contacts the water his speed is 9.20 m/s and his body makes anangle of 78.0owith respect to the horizontalsurface of the water.
A block starts from rest at the top of a 30.0° inclined frictionless plane and after travelling 1.00 m encounters a spring, how much would the block compress the spring
A single-turn circular loop of radius 5 cm is to produce a field at its center that will just cancel the earth's field of magnitude 0.7 G directed at 70 below the horizontal north direction. Find the current in the loop.
a certain region of space bounded by an imaginary closed surface contains no charge. is the electric field always zero
a current of 0.307 a through your chest can send your heart into fibrillation ruining the normal rhythm of heartbeat
The left ventricle of the heart accelerates blood from rest to a velocity of + 25.9 cm/s, How much time does blood take to reach its final velocity
An ideal gas is enclosed in a cylinder that has a moveable pistonon top. The piston has a mass of 4500 g and an area of 6.50 cm2 and is free to slide upand down, keeping the pressure of the gas constant.
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 228 J when 166 J of work is done on the system.
During a recent thunderstorm the wind was blowing past your roof at 40 m/s. Assuming that the density of air is 1.20 kg/m^3, What is the net force experienced by the roof
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