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Q. Assume we have an infinitely long wire carrying a current of 4.0 A. It is bent into an L-shape extending into positive infinities along the x- and y- axes. Find out the magnitude of the magnetic field at the point P with coordinates (0.2 m, 0.2 m).
When a train's velocity is 12{rm{ m/s}} eastward, raindrops that are falling vertically with respect to the earth make traces that are inclined 30.0 ^circ to vertical on windows of the train.
A man drops a baseball off of the top of the Empire State Building. If an action force is the pull of the Earth on the ball, then what is the reaction force.
The density of free electrons in gold is 5.90 x 10^28 m-3. The resistivity of gold is 2.44 x 10-8 at a temperature of and the temperature coefficient of resistivity is 0.004 ()-1. A gold wire, 1.30mm in diameter and 27cm long, carries a current of..
Clifford is in a real hurry, however, and skips the speed ramp. Starting from rest with an acceleration of 0.49 m/s2, he covers the same distance as the ramp does, but in one-fourth the time. What is the speed at which belt of the ramp is moving.
A horizontal ray of light falls on a vertical plane mirror free to turn about the horizontal axis. If the mirror turns through 20o, by what angle does the reflected ray turn.
The frequency of a tuning fork is 358 Hz. Find the length of the shortest organ pipe which will give 6 beats/s with the fork. The velocity of sound in air is 339.1 m/s.
At t=0 a grinding wheel has an angular velocity of 30.0 rad/s. It has a constant angular acceleration of 31.0 rad/s^2 until a circuit breaker trips at time t = 2.00 s. From then on, it turns through an angle 428 rad as it coasts to a stop at constant..
Inversely proportional to the square of the fields
An observer inside the building notices that it takes 0.15s for the tile to pass her window, whose height is 2.20m. How far above the top of this window is the roof.
A person whose eyes are H = 1.64 m above the floor stands L = 2.3 m in front of a vertical plane mirror whose bottom edge is 38 cm above the floor. What is the horizontal distance x to the base of the wall supporting the mirror of the nearest point o..
Estimate the ball's rise in temperature.
A high-frequency photon is scattered off of an electron and experiences a change of wavelength of 8.0×10-4 .At what angle should a detector be placed to detect scattered photon (relative to the direction of the incoming photon).
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