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Part of a long, straight wire is bent into a circular loop of radius R such that the current flows from the left, then around the loop, and then out to the right (see figure). Find the magnitude of the magnetic field at the center of the loop. (use principle of superposition).
A velodrome track is banked so that a bicycle traveling at 69.9 km/h will have no tendency to slip to either side when traveling on the path that has a radius of curvature of 54.0 m
A 75 kg student runs at 5 m/s, grabs a rope,and swings out over a lake, he release the rope when his velocityis zero. What was his velocity when he hit the water
A 4.30 capacitor that is initially uncharged is connected in series with a 7.90 resistor and an emf source with 225 negligible internal resistance. what is the voltage drop across the capacitor
A swimming duck paddles the water with its feet once every 1.8sec,producing surface waves with this period. How far apart are the crests behind the duck
When a train's velocity is 12{rm{ m/s}} eastward, raindrops that are falling vertically with respect to the earth make traces that are inclined 30.0 ^circ to vertical on windows of the train.
A sprinter explodes out of the starting block with an acceleration of +3.9 m/s2, What is her velocity at the end of the race
After leaving the end of a ski ramp, a ski jumper lands downhill at a point that is displaced 55 kilometer horizontally from the end of the ramp. evaluate his initial velocity (magnitude and direction) when he left the end of the ramp
A sinusoidal wave traveling in the positive x-direction has a wavelength of 62.0 cm, a frequency of 58.0 Hz, and an amplitude of 74.0 cm. The part of the wave that is at the origin at t = 0 has a vertical displacement of 22.94 cm.
when a resistor is connected to a 10v source it draws a 185ma current. the same resistor connected to a 96v source
A 48 kg bear slides, from rest, 9.7 m down a lodgepole pine tree, moving with a speed of 5.8 m/s just before hitting the ground. find the average frictional force that acts on the sliding bear
0.14 kg of water at 88.0 deg C is poured into an insulated cup containing 0.234 kg of ice initally at 0 deg. Calculate the mass of liquid
The two stars in a binary star system have masses 2.2×1030 and 6.5×1030 . They are separated by 2.1×1012 .What is the system's rotation period, in years? What is the speed of the lightest star? What is the speed of the heaviest star?
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