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A circular coil consists of N = 495 closely winded turns of wire and has a radius R = 0.75 m. A counterclockwise current I = 2.1 A is in the coil. The coil is set in a magnetic field of magnitude B = 1.4 T. The magnetic field points to right.
Express the magnetic dipole moment μ in terms of the number of the turns N, the current I, and radius R.
Which direction does μ go?
If the magnetic field was pointing upward, express the potential energy of the coil in the magnetic field,Uu, in terms of μ and B.
WhatAc€?cs the torque τu now?
A model airplane flies ina horizantal circle at the end of a50 meter long control wire, with a speed of 40 m/s. The plane has amass of 1.25 kg. Calculate the tension in the wire if the planes wings make a constant 15 degrees angle with the horizontal..
A magnifying glass has a focal length of 8cm. How close to an object do you need to place the magnifying glass, What type of image is this and what is its magnification
On a certain planet, a 10 kg rock has a gravitational potential energy of 1,056 J when it is resting on a cliff 12 m above the surface
Which would have a higher kinetic energy , an airplane travellingat the speed of sound or an airplane with half the weight of the first plane and travelling twice the speed of sound ?
A solid uniform disk of radius 0.250 meter and mass 44.0 kilogram rolls down a ramp of length 5.00 meter that makes an angle of 12.6 degree with the horizontal. Compute the angular speed of the disk at the bottom of the ramp
Indicate whether the following statements are always true or can be false. If a net force acts on an object, the object's speed will change. If a net force acts on an object, the object's velocity will change.
The nucleus of an atom of radium (mass 3.77 X 10-25 kg) suddenly ejects an alpha particle (mass 6.68 X 10-27 kg) of an energy of 7.26 X 10-16 J. What is the velocity of recoil of the nucleus
A textbook of mass 1.90kg rests on a frictionless, horizontal surface. A cord attached to the book passes over a pulley whose diameter is 0.150m, What is the tension in the part of the cord attached to the textbook
Three resistors, of 8.0 %u03A9, 12 %u03A9, and 24 %u03A9, are in parallel, and a current of 20 A is drawn by the combination. Determine the potential difference across the combination
A child in a boat throws a 3.50 kg package out horizontally with a speed of 15m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25kg and that of the boat is 70kg. Ignore water re..
you are on an airplane traveling 30deg south of due west at 150.0 ms with respect to the air. the air is moving with a
A shopper pushes a cart 49 m south down one aisle and then turns 90.0° west and moves 11 m. What is the smallest possible displacement of the shopper
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