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At one time, television sets used "rabbit-ears" antennas. Such an antenna consists of a pair of metal rods. The length of each rod can be adjusted to be one-quarter of a wavelength of an electromagnetic wave whose frequency is 55.0 MHz. How long is each rod?
______m
Suppose a patient having an MRI is immersed in a 3.0 T field along the axis of his body. He then quickly tips his head to the side, toward his right shoulder, tipping his head by 30 degrees in the rather short time of 0.15 s.
Suppose a bat uses sound echoes to locate its insect prey, 3.00 m away. What is the percent uncertainty does this cause for the bat in locating the insect
a base for a building column measures 18.0 in. by 18.0 in. on a side and 12 in. high. compute the cross-sectional area
As a tennis ball is struck, it departs from the racket horizontally with a speed of 27.3 m/s. How far above the court is the tennis ball
A large storage tank, open to the atmosphere at the top and filled with water, Determine the speed at which the water leaves the hole
A block is attached to a chord passing over a pulley through a hole in a horizontal frictionless surface. what is the new angular velocity
An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.0 cm, and length 25 cm. What is the relative permeability KB of the iron core
Given: A 23.0\mu F capacitor is charged by a 135.0-V power supply, then disconnected from the power and connected in series with a 0.270-mH inductor.
A proton moving with a velocity of 4.0 *10^4 m/s enters a magnetic field of 0.20 T. what is the magnitude of the force on the proton
An inventor claims to have devised a cyclic engine which exchanges heat with reservoirs at 300 K and 540 K, and which can produce 450 J of work per 1000 J of heat extracted from the hot reservoir. Is his claim feasible.
Four point charges, each with Q = 8.8 µC, are arranged at the corners of a square of edge length 1.4 m. What is the electric potential at the center of the square
Two capacitors, one that has a capacitance of 3.90 µF and one that has a capacitance of 12.3 µF, are connected in parallel. Find the potential difference across each capacitor after they are reconnected
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