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The current density inside a long, solid, cylindrical wire of radius a is in the direction of the central axis and its magnitude varies with radial distance r from the axis according to J = br2, where b is a positive constant. Find the magnitude of the magnetic field as a function of distance r for (a) 0 >r > a and (b) r > a. Express your answer in terms of the variables given and ?
a 150g bullet is fired from a rifle with a barrel of length 65cm the bullet starts from rest at one end of the barrel, find the speed of the bullet as it leaves the rifle
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 10 A, and that of the vacuum cleaner is 5.0 A, Determine the power consumed by the blow-dryer
You are standing on a large sheet of frictionless ice and are holding a large rock. If your mass is 75.0kg and the rock's mass is 14.3kg, what is your speed after you throw the rock
A 15 V constant voltage battery is connected to 120 kΩ resistora. How many electrons pass through the resistor each second
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.12 106 m/s. Find the centripetal acceleration of the electron
Two forces are applied to a car in an effort to accelerate it. The first force, F1 = 328 N, is applied at an angle α = 35° to the forward dashed line. The second force, F2 = 544 N, is applied at an angle β = 8° to the forward dashed line. (a) What is..
A deuteron particle (the nucleus of an isotope of hydrogen consisting of one proton and one neutron and having a mass of 3.34×10?27 kg) moving horizontally enters a uniform, vertical, How fast was this deuteron moving just before it entered the mag..
A high-voltage transmission line carries 500 A at 700 kV for a distance of 100 miles. what is the power loss due to resistive losses
A celebrity holds a press conference, which is televised live. A television viewer hears the sound picked up by a microphone directly in front of the celebrity, determine the maximum distance between the television viewer and the celebrity
You are called as an expert witness in the trial of a traffic violation. The facts are these: A driver slammed on his brakes and came to a stop with constant acceleration, How fast was he going when he hit his brakes
While an elevator of mass 824 kg moves downward, the tension in the supporting cable is a constant 7736 N, What is the elevator's speed at t = 4.10 s
a circular loop of radius 1.00 m is placed in a magnetic field of magnitude of 0.500 T. find the magnetic moment of the loop
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