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In a Hall-effect experiment, a current of 2.9 A sent lengthwise through a conductor 0.89 cm wide, 3.1 cm long, and 8.5 µm thick produces a transverse (across the width) Hall potential difference of 9.0 µV when a magnetic field of 1.7 T is passed perpendicularly through the thickness of the conductor. From these data, find
(a) the drift speed (in m/s) of the charge carriers and
(b) the number density of charge carriers (in m-3).
How fast (in {rm rpm}) must a centrifuge rotate if a particle 8.5 cm from the axis of rotation is to experience an acceleration of 115000 {rm g}'s.
A stunt man whose mass is 70 kg swings from the end of a 4.40-m long rope along the arc of a vertical circle. Assuming that he starts from rest as rope is horizontal, find out the tensions in the rope that are required to make him follow his circu..
You're carrying a 4 m long, 23 poles to a construction site when you decide to stop for a rest. You place one end of the pole on a fence post and hold other end of the pole 35 from its tip. How much force should you exert to keep the pole motionle..
A dentist uses a small mirror of radius 44mm to locate a cavity in a patient's tooth. If the mirror is concave and is held 13 mm from the tooth, what is magnification of the image.
Two identical positive charges exert a repulsive force of 7.4 x10-9 N when separated by a distance of 4.8 10-10 m. compute the charge of each.
A long, straight wire has a 13.7 A current flowing in the positive x-direction. Close to wire is a square loop of copper wire that carries a 2.17 A current in direction shown. The near side of the loop is d = 46.3 cm away from the wire.
An airplane is flying with the velocity of 85.0 m/s at an angle of 20.0 degrees above the horizontal. When the plane is a distance 107 m directly above the dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far..
what is work done on package by friction.
what average power was developed. A curve of radius 70 m is banked for a design speed of 110 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely make the curve.
Compute the position, velocity vector and the distance attained by athlete in a long jump event.
A 20-cm-radius ball is uniformly charged to 88nC, What is the ball's uniform charge density (C/m3) and What is the electric field strength at points 5, 10, and 20 cm from the center
A bucket filled with water exerting a force of 529N is hanging from a rope that is wound around a 0.05 m radius stationary cylinder. If cylinder does not rotate and the bucket hangs straight down, what is the magnitude of torque the bucket produce..
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