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1. Is the drift current formulae an equilibrium or nonequilibrium expression?
2. A current of 1 A/cm2 is forced through an n-type Si bar with a resistivity of 1 ohm-cm at 300K. What is the drift velocity of the electrons? How long does it take for an electron to drift through an Si bar of 1mm long?
The springs of a 1400 kg car compress 6.0 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, what will be the frequency of vibrations.
A cart loaded with bricks has a total mass of 20 kg and is pulled at constant speed by a rope. How much work is done on the cart by the rope
A 12.0 Volt battery is connected into a series circuit containing a 10.0 ohm resistor and a 2.00-H inductor. Find how long will it take the current to reach 90.0% of its final value
A penny of mass 3.10 g rests on a small 20.0-g block supported by a spinning disk
An object is hung from a spring balance attached to the ceiling of an elevator cab. Determine the reading when the elevator is moving upward with a constant speed of 8.5 m/s
A man is traveling on a bicycle at 14 m/s along a straight road that runs parallel to several railroad tracks. He hears the whistle of a train that is behind him. The frequency emitted with the train is840 Hz, but the frequency the man hears is 778 H..
A disk 8.00 cm in radius rotates at a constant rate of 1,200 rev/min about its central axis. Determine its angular speed in radians/sec
A certain kind of glass has an index of refraction of 1.640 for blue light of wavelength 440 nm and an index of 1.595 for red light of wavelength 670 nm. If a beam containing these two colors is incident at an angle of 30.0° on a piece of this glass,..
An alpha particle (q = +2e, m = 4.00 u) travels in a circular path of radius 4.54 cm in a uniform magnetic field with B = 1.53 T. Calculate its period of revolution
A chick farmer decides to increase the size of her flock from500 chickens to 2000 chickens. estimate how much louder will the sound be
Imagine two 5.0 g bags of protons, one at the earth's north pole and the other at the south pole. Calculate the electrical repulsion
Assuming that the only forces affecting the speed are the weight and the drag, calculate the drag coefficient. The frontal area is 0.9 m2. Speculate whether the rider is in the upright or racing position.
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