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A wheel of mass M, radius of gyration k, spins smoothlyon a fixed horizontal axle of radius a which passes through a holeof slightly larger radius at the hub of the wheel. The coefficientof friction between the bearing surfaces is μ. If the wheel isinitially spinning with angular velocity ω0 , find the time and the number of turns that it takes to stop.
a capacitor of capacitance c 6 of is connected in series with a resistor r 5 m to a battery of emf e15v what is the
An athlete at a gymnasium holds a 3.0kg steel ball in his hand. His arm is 70cm long and has a mass of 4.0kg. Calculate the magnitude of the torque about his shoulder if he holds his arm
the electrons that produce the picture in a tv set are accelerated by a very large electric force as they pass through
A roller coaster of mass 250kg has a speed of v=12m/s at point a, located at a height h=15m. The car can move without friction actiong between points a and b. How far does the car travel before coming to rest
The water level in a vertical glass tube 1.150 m long can be adjusted to any position in the tube. What is the greatest depth of water for which there will be resonance in the air in the tube
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
Two small charges with a mass of 1.0 g each are connected by 2.0-cm-long insulating rod of negligible mass. What is the dipole moment of the rod?
When the current through an inductor increases from 8 A to 10 A, the energy stored in it increased by 44 µJ. What is the self inductance of the inductor
The force of attraction between a -40 micro C and + 108 microC charge is 4 N. What is the separation between these two charges
The coil of wire in a galvanometer has a resistance of RC = 64.0 . The galvanometer exhibits a full-scale deflection when the current through it is 0.290 mA. What is the resistance of this resistor
in a interference experiment d 4mm l 1m the second maximum n 2 appears on the screen at a distance 4mm from the
A balloon rises at at constant velocity of 3m/s. A rock is released over the side. 4.5 seconds later this rock hits the ground. compute the height of the rock when it is halfway between the balloon and the ground. Assume Earth gravity (-9.81m/s), ..
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