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An electromagnetic wave with frequency 56.0 Hz travels in an insulating magnetic material that has dielectric constant 3.72 and relative permeability 5.11 at this frequency. The electric field has amplitude 7.26 10-3 V/m.
(a) What is the speed of propagation of the wave?
m/s
(b) What is the wavelength of the wave?
m
(c) What is the amplitude of the magnetic field?
T
(d) What is the intensity of the wave?
W/m2
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. The horizontal distance between the release point and the point where the decoy strikes the ground is 700 m..
A wrecking ball (weight = 4800 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3600 N. As support cable runs from the top of the boom to the tractor.
Discuss the cause and different mechanisms available. Recognize and discuss the flow control techniques on which they are based? Determine the pros and cons of each?
A flight attendant pulls her 72.0 N flight bag a distance of 282 m along a level airport floor at a constant speed. The force she exerts is 33.0 N at an angle of 52.0° above the horizontal.
The magnitude of q is chosen to make the potential difference between spheres 430 V, with the inner sphere at higher potential. Compute q.
Suppose you see two main-sequence stars of the same spectral type. Star 1 is dimmer in apparent brightness than Star 2 by a factor of 100. What can you conclude? (Overlook any effects that might be caused by interstellar dust and gas.)
Charge is distributed with constant volume density D throughout the rectangular box with length a, width b and height c.
calculate the electric field on the axis of the disk at 5 cm, 10 cm, 50 cm, 200 cm from the center of the disk
A point charge Q is trapped at the center of a thin-walled hollow conductive sphere of radius R, How much charge will collect on the inside surface of the hollow sphere
A 790-kg object and an 889-kg object are separated by 11.0 m. At what position (from the less massive object) can the 260-kg object be placed so as to experience a net force of 10 N towards the less massive object.
A 43.0-N child is in a swing that is attached to ropes 1.60 m long. Find the gravitational potential energy associated with the child relative to her lowest position at the following times.
Four charges are arranged in a rectangle with a length of 21 cm, and width of 15 cm. The charge on the top left corner is 4nC, the charge on top right corner is -3nC, the bottom right corner has a charge of 6nC, and the bottom left corner has a ch..
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