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A cockroach of mass m lies on the rim of a uniform disk of mass 4m that can rotate freely about its center like a merry-go-round. Initially the cockroach and disk rotate together with an angular velocity of ?0. Then the cockroach walks halfway to the center of the disk.
(a) What then is the angular velocity of the cockroach-disk system?
(b) What is the ratio K/K0 of the new kinetic energy of the system to its initial kinetic energy? State your answer in terms of the given variables.
A typical car battery is composed of six, 2.1 V cells arranged in series to have an Emf of 12.6 V. How many electrons pass through the starter motor
question1the magnitude of four displacement vectors shown in the drawing are a 16.0 m b 11.0 m c 12.0 m and d 26.0
The velocity of light in glass is 2*10^8 m/s and in air is 3*10^8 m/s. How much would be an ink dot to be raised, when covered by a glass plate of 6cm thick
What are the magnitude and direction of the net force. how long does it take for the police car to catch up with the speeder.
When the three blocks in the figure below are released from rest, they accelerate with a magnitude of 0.740 m/s2, What is the coefficient of kinetic friction between block 2 and the table
What is the charge on the drop. A 13 kg child on a playground swing moves with a speed of 3.6 m/s when the 6.0 m long swing is at its lowest point. What is the angle that swing makes with the vertical when the child is at the highest point.
A 32 cm long solenoid, 1.8 cm in diameter, is to produce a 0.24 T magnetic field at its center. If the maximum current is 5.7 A, how many turns must the solenoid have
A movie projector is equipped with a 0.6-meter focal length lens that is positioned 0.605 meters from the film. How many times larger is the image than the object
The center fielder for the school's baseball team throws a 0.150-kg baseball towards home plate at a speed of 26.0 m/s, What is the kinetic energy of the baseball
A 10.0-uF capacitor, a 40.0-uF capacitor, and a 100.0-uF capacitor are connected in parallel across a 12.0v battery. what is the equivalent capacitance of the combination
A block of wood (Mblock = 5.8 kg) rests on a horizontal surface for which the coefficient of kinetic friction is 0.6. What was the initial velocity of the bullet before impact
A storage tank 29 m high is filled with gasoline. (Assume the tank is open and exposed to the atmosphere at the top.), Find the gauge pressure at the bottom of the tank
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