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Two long straight wires are carrying current out of this page. Make the plane of this paper the x-y plane, and put one wire at the origin with 5 A., the other wire at (2m, 0) with 4 A. Draw this below. Find the magnetic field at the point (-1m, 0). If a wire with current into the page of 3A. is placed at (-1m, 0), find the force per unit length on that wire.
A 630-Hz sound travels through pure hydrogen. What is the speed of sound in hydrogen
A magnetic ?eld of 0.285 T exists in the region enclosed by a solenoid that has 329 turns and a diameter of 11.5 cm. What current is induced in the coil
In the Bohr model of the hydrogen atom, an electron in the 3rd excited state moves at a speed of 2.43 105 m/s, What is the effective current associated with this orbiting electron
A doubly charged ion is accelerated to an energy of 30.0 keV by the electric field between two parallel conducting plates separated by 1.50 cm
A block is at rest on a plank whose angle can be varied. The angle is gradually increased from 0 deg. find the kinetic coefficent of friction between the block and the plank
A 85.6-kg wrecking ball hangs from a uniform heavy-duty chain having a mass of 27.0kg, Find the maximum tension in the chain
define the dielectric constant of the dielectric.
What is the percent change in momentum of a proton that accelerates from 0.42c to 0.91c?0
A copper ball with a radius of 1.6cm is heated until its diameter has increased by 0.17mm. find the final temperature of the ball.
Two stationary positive point charges, charge 1 of magnitude 3.10 nC and charge 2 of magnitude 1.74 nC, are separated by a distance of 36 cm. An electron is free from rest at the point midway between the two charges, and it moves along the line con..
You take the elevator to the roof of midtown skyscraper that is 100 meters high. What was the velocity of your souvenir just before it hit the ground
An athlete crosses a 29 m wide river by swimming perpendicular to the water current at a speed of 0.6 m/s relative to the water. How fast is the water flowing relative to the ground
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