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The deflection in the moving coil galvanometer is reduced to half when it was shunted with a 40 ohm coil. The resistance of the galvanometer is what?
A 900 kg car travelling east at 15 m/s collides with 750 kg travelling north at 20 m/s. what is the speed of the wreckage
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +10q. What is the total charge on the three spheres after they have touched
A charging RC circuit controls the intermittent windshield wipers in a car. The emf is 12.0 V. What resistance should be used in the charging circuit if the wipers are to operate once every 1.40 s
A single-turn circular loop of radius 8.00 cm is to produce a field at its center that will just cancel the earth's field of magnitude 0.7G directed at 70 below the horizontal north direction. Find out the current in the loop.
A playground merry-go-round of radius R = 1.80 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. What is the new angular speed of the merry-go-round
A window of a car is found to be covered with 0.6cm of ice. If the area of the window is 1 m2, and the ice is at -12 degrees Celsius, what is the minimum heat required to melt all the ice
How far from a 53.6 mm focal-length lens must an object be placed if its image is to be magnified 2.12X and be real.
A wheel 45.0 cm in diameter accelerates uniformly from 206rpm to 340 rpm in 7.0 s. How far will a point on edge of the wheel have travelled in this time.
when jim abd rob ride bicycles, jim can only accelerate at three quarters the acceleration of Rob. Both start from rest at the bottom of a long straight road with constant upward slope. If rob takes 5.7 minutes to react the top, how much earlier s..
Find the charge-to-mass ratio of an unknown point charge that is repelled strongly enough from a single electron to be suspended motionless against its own weight
A 60 kg person jumps off a diving board and hits the water with a speed of 21 m/s. Determine the magnitude and direction of the average force that the water exerts on the diver
A dolphin located in sea water at a temperature of 25°C emits a sound directed toward the bottom of the ocean 100 m below
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