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A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the coil is parallel to the magnetic field. The coil is then rotated through an angle of 90?, so that the normal becomes perpendicular to the magnetic field. The coil has an area of 1.5 × 10-3 m2, 50 turns, and a resistance of 110 ?. During the time while it is rotating, a charge of 5.5 × 10-5 C flows in the coil. What is the magnitude of the magnetic field?
A light bulb marked "100 W [at] 120 V" is screwed into a socket at one end of a long extension cord in which each of the two conductors has resistance of 0.600 Ω
A 60 kg trunk is pushed 4.0 m at constant speed up a 30° incline by a constant horizontal force. Calculate the work done by the weight of the trunk
What current flows through a 2.54 cm diameter rod of pure silicon that is 19.0 cm long, when 1000 V is applied to it
What is the size of the gravitational force that the Earth exerts on the Moon.
A-3.18. A B-2A is flying at 43,000 ft in standard day conditions at 400 KTAS. The mean chord length is 39.6 ft. Find the overall or total Reynolds number for the aircraft
The rms current in a 43 ohm resistor is 0.58 A. What is the peak value of the voltage across this resistor
A 2.10-µF capacitor was fully charged by being connected to a 12.0-V battery. Calculate the damped frequency of the resulting circuit
When our sun runs out of fuel, it will eventually become a white dwarf star with about the same radius as the earth. Estimate the sun's rotational period when it is that size
A cat is trying to jump onto a countertop that is 1m tall from 0.3m away. The cat's initial jump speed (magnitude of the total initial velocity) is 10m/s
A flea's eye having a diameter of 0.003 mm is examined under a microscope. If the microscope has a magnification of 500X, determine the size of the image of the eye
A 480 g ball swings in a vertical circle at the end of a 1.9 m-long string. What is the speed of the ball at that point
q1. a car moving at 37 ms approaches a stationary whistle that emits 270 hz sound. the speed of sound is 347 ms. what
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