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As you finish listening to your favorite compact disc (CD),the CD in the player slows down to a stop. Assume that the CD spinsdown with a constant angular acceleration.**If the CD rotates at 500 rpm (revolutions per minute) whilethe last song is playing, and then spins down to zero angular speedin 2.60 s with constant angular acceleration, what isalpha, the magnitude of the angular acceleration ofthe CD, as it spins to a stop?
An emf is induced in a conducting loop of wire1.42 {\rm m} long as its shape is changed from square to circular. Find the average magnitude of the induced emf if the change inshape occurs in 4.12 {\rm s} and the local 0.121-{\rm T} magnetic field ..
In which case is it more likely that we may neglect non-ohmic effects due to the heating of the circuit by the current: in a series or parallel circuit? Why?
Three equal point charges, each with charge 1.25 , are placed at the vertices of an equilateral triangle whose sides are of length 0.400. What is the electric potential energy of the system
A 51.0 kg woman balances on one heel of a pair of high-heeled shoes. If the heel is circular and has a radius of 0.400 cm, what pressure does she exert on the floor
question1a subway train starting from rest leaves a station with a constant acceleration. at the end of 9.34 s it is
Power transmission lines often use a form of electric current called alternating current, but in many regions, such as the Province of Quebec, high-voltage direct-current lines are used instead. What is the power loss due to resistance in the line
If two successive overtones of a vibrating string are 280 Hzand 350 Hz, what is the frequency of the fundamental
An iron casting containing a number of cavities weighs 20052.8 N in air and 16121.0 N in water. What is the total volume of all the cavities in the casting
A circular coil with 79 turns of wire and a diameter of 18 cm is placed in a magnetic field given by B(t) = 5 t2 + 2 t + 3 T where t is time in seconds. The field is perpendicular to the plane of the coil. What is the induced EMF at t = 7 s?
An ambulance traveling at 46 m/s approaches a car heading in the same direction at a speed of 31 m/s. At what frequency does the driver of the car hear the siren
A 0.410-kg ball is dropped from rest at a point 4.30 m above the floor. what is the impulse of the net force applied to the ball during the collision with the floor
Two cicadas, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 3.10 , while Milada jumps horizontally with an initial speed of 98.
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