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Two magnetically-coupled coils have a mutual inductance of 64 mH.
Predict the average e.m.f induced in one, if the current through the other changes from 6 to 30 mA in 0.008 second? That one coil has twice the number of turns in the other, calculate the inductance of each coil. Neglect leakage.
A piece of ice with a mass of 30 grams at 0° C is added to 100 ml of water at 20° C. Assuming no loss of heat to the surroundings, what is the situation when equilibrium is reached?
An iron wire with a diameter of 1.2 mm has a uniform electric field of 0.35 V/m imposed along its entire length. What is the current density in the wire
A 3440-kg spacecraft is in a circular orbit a distance1850 km above the surface of Mars.How much work must the spacecraft engines perform to move the spacecraft to a circular orbit that is 4360 km above the surface?
A bowler holds a bowling ball (M=6.5 kg) in the palm of his hand. His upper arm is vertical, his lower arm (1.7 kg) is horizontal. What is the magnitude of the force of the biceps muscle on the lower arm?
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 423 N and F2 = 355 N. What is the resultant of these two forces
a) Find the maximum KE of the emitted electron. b) What color light was used? c) What color of light will just ionize the metal ( Hint: KE will be zero).
Calculate the mutual inductance of a solenoid 25 cm long of radius 1.5 cm with 500 turns, and a single loop of radius 3.0 cm centered on the solenoid
If 20.0 kcal of heat aresupplied to 6.00 multiplied by 102 gof water at 23°C, what is the final temperature of the water
A bullet of mass 5.0 g is fired horizontallyinto a 2.3 kg wooden block at rest on a horizontal surface. At what speed is the bullet fired
A child is riding a merry-go-round which completes one revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. What is the magnitude of the centripetal acceleration of the child?
Assume that the cost of liquid nitrogen is $0.30 per liter, and that electric energy costs $0.10 per kW·h. What is the resistance of a normal wire that costs as much in wasted electric energy as the cost of liquid nitrogen for the superconductor?
Identify a current problem in physics by searching for news articles and current events.
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