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The maximum strength of the earth's magnetic field is about 6.9 x 10-5 T near the south magnetic pole. Suppose we want to utilize this field with a rotating coil to generate 47.7-Hz ac electricity. What is the minimum number of turns (area per turn = 0.018 m2) that the coil must have to produce an rms voltage of 150 V?
An object falls off of a pier and into the ocean (sea water) where it displaces a total volume of 3.6 cubic meters of sea water. What is the buoyant force acting on the object
A movie star catches a reporter shooting pictures of her at home. She claims the reporter was trespassing and to prove her point, How far away from the subject was the reporter standing
Two sets of Christmas lights are available. For set A, when one bulb is removed, the remaining bulbs remain illuminated. Explain the difference in wiring for the two sets
A 1.25 meter long wire has a mass of 150 grams. The wire is stretched with a force of 2 Newtons. What is the velocity of a wave over the wire
When jumping, a flea reaches a takeoff speed of 1.2 m/s over a distance of 0.46mm, What is the flea's acceleration during the jump phase and How long does the acceleration phase last
A small solid ball of mass M and radius R rolls without slipping on the track whose height y as a function of horizontal position x is given by y=ax^2, Find an expression for the period of the resulting motion
At time zero, an object is thrown upward at a speed of 14.0 m/s from the top of a 91.0 m tall building. What time is it when the object hits the ground
water flows between two parallel plates separated by a distance of h. there is a pressure gradient along x which is constant, find the pressure gradient
A log floats in a river with 1/5 of its volume above the water. Density of water is 1000 kg/m, how much of the volume is now above the water
Calculate the force on the baby due to Jupiter if it is at its closest to the Earth, some 6.29x1011 m away, showing it to be comparable to that of the father
The distance between the first and fifth minima of a single slit diffraction pattern (on the same side of the central maximum) is 0.35 mm with the screen 45 cm away from the slit and using light of wavelength 550 nm. For this problem, you may assu..
The magnetic flux through a coil of wire containing two loops changes from -23Wb to +33Wb in 0.57s. What is the emf induced in the coil
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