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1. The magnetic field in a superconducting solenoid is 3T. How much energy there is in the solenoid, in J/m3 ?
2. A 10-mH inductor is connected in series with a 10 ohm resistor. What is the time constant of the circuit?
A jet engine emits sound uniformly in all directions, radiating an acoustic power of 3.89 × 102 kW, calculate the corresponding sound intensity level
A professor shipwrecked on Hooligan's Island decides to build a telescope from his eyeglasses and some coconut shells. Which lens should he use as the objective
A 1500 kg elevator starts from rest and moves upward with constant acceleration for 4.0 s until it reaches its operating speed of 2.0 m/s. Calculate the power required by the elevator motor while the elevator is operating at its operating speed
if you have two different cycles and the only difference between them is that cycle 1 has a less amount of positive
A gymnast falls from the high bar and lands on a 10 cm thick gymnastics mat. Estimate the peak acceleration of the gymnast's head
Certain stars at the end of their lives are thought to collapse combining their protons and electrons together to form a neutron star. Such a star could be thought of as a giant atomic nucleus.
Two point charges are placed along a horizontal axis with the following values and positions: +2 µC at x = 0 cm and - 21 µC at x = 21 cm. At what point (the coordinate) along the x axis is the electric field zero? Expess the answer (in cm) with one d..
An 80.7-kg jogger is heading due east at a speed of 1.950 m/s. A 53.60 kg jogger is heading 33.1° north of east at a speed of 2.89m/s. compute the magnitude (enter first) and direction of the sum of momenta of the two joggers.
The top of a swimming pool is at ground level. If the pool is2.20 m deep, how far below ground leveldoes the bottom of the pool appear to be located for the following conditions?
A 0.0575 kg ball is dropped from a height of 6 meters. If theball hits the ground and rebounds to a height of 5 meters, what was the impulse exerted on the ball by the ground
A 965 kg car traveling initially with a speed of 25.3 m/s in an easterly direction crashes into the rear end of a(n) 9510 kg truck moving in the same direction at 16.8 m/s. What is the velocity of the truck immediately after the collision
A typical nuclear power plant converts 0.01% of the mass of its fuel into energy through nuclear reactions. How much fuel would be needed to power an average city for one day
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