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At room temperature the electrical conductivity of PbTe is 650 ( ?·m ) -1 , whereas the electron and hole mobilities are 0.16 and 0.080 m2 / V s· , respectively. Compute the intrinsic carrier concentration for PbTe at room temperature.
A child in a boat throws a 5.45-kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest
The head of a 1.0 kg hammer; moving at 3.6 m/s. strikes a nail and drives it into hardwood. The head stays in contact 2.0 m/s and rebounds with negligible velocity. What is the average force exerted on the nail.
two coils have the same number of circular turns and carry the same current. each rotates in a magnetic field acting
A pitched ball is hit by a batter at a 45° angle and just clears the outfield fence, 98 m away. Suppose that the fence is at the same height as the pitch and find the velocity of the ball when it left the bat. Neglect air resistance.
a bat flies toward a wall emitting a steady sound with a frequency of 20.0 khz. this bat hears its own sound plus the
q1. a ball tied to the end of the string is swung in a vertical arc of radius r under the action of gravity. what would
A charge of -8.8 µC is traveling at a speed of 7.3*106 m/s in a region of space where thereis a magnetic field. The angle between the velocity of the chargeand the field is 52°. A force ofmagnitude 5.2*10-3 N acts on the charge. What is the magnitu..
a coil of self inductance 7.5 mh and resistance of 30 w is placed across the terminals of a 12-v battery of negligible
A flat circular coil by 106 turns, a radius of 2.43 x10 -2 m, and a resistance of 0.328 Ω is exposed to an external magnetic field that is directed perpendicular to the plane of the coil.
A 81.0-kg daredevil exhibitionist hangs on to the end of a long bungee cord attached to the railing of the Brooklyn Bridge and oscillates vertically, What is the frequency of oscillation
The heating element of a room heater is rated at 750W when itis operated from a 120V power supply? What is the resistance of the heating element?
a mass is hanging from a spring. consider this position the zero point. it is in equilibrium at this position. by
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