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An airplane flying at a distance of 30 km from a radio transmitter receives a signal of intensity 25 µW/m2. The transmitter radiates uniformly over a hemisphere.
a) Compute the transmission power of the transmitter.
b) What is the amplitude of the magnetic component of the signal at the airplane?
c) What is the amplitude of the electric component of the signal at the airplane?
A solid, horizontal cylinder of mass 9.0 kg and radius 1.30 mrotates with an angular speed of 6.00 rad/s about a fixed verticalaxis through its center. Determine the final angular speed of the system
A dam is used to block the passage of a river and to generate electricity. Approximately 5.73 x 10^4 kg of water fall each second through a height of 19.6 m. I one half of the gravitational potential energy of water were converted to electrical energ..
An object is lifted vertically 2m and held there. If the object weighs 30N, how much work was done in lifting it. Describe it briefly.
A coiled wire forms a spiral with 243 turns, a diameter of 2.3 cm, and an unstretched length of 27 cm. Determine the self-inductance of the coil
Two positive charges of 7.40 micro-Coulombs are placed on a horizontal surface with a coefficient of static friction 0.72. If they are originally far apart.
a flat 136-turn current-carrying loop is immersed in a uniform magnetic field. the area of the loop is 6.15 cm2 and the
When a nucleus of ^235 U undergoes fission, it breaks into two smaller, more tightly bound fragments. Calculate the binding energy per nucleon for the fission product
Cobalt has a saturation magnetization of 1.4 times 106 A/m, and an atomic volume of 6.7 cm3/mole. (a) What is the magnetic dipole moment of each cobalt atom in Bohr magnetons?
State the condition that is necessary for a charge to move in a wire. Relate the definition of electric current to the units of current. Explain the cause of resistance and how the resistance of a wire can be determined.
A certain kind of glass has an index of refraction of 1.655 for blue light of wavelength 430 nm and an index of 1.62 for red light of wavelength 680 nm. A beam containing these two colors is incident at an angle of 42.22 degrees on a piece of this g..
A rubber ball of mass 24.5 g is dropped from a height of 2.05 m onto a floor. The velocity of the ball is reversed by the collision with the floor,and the ball rebounds to a height of 1.30m. What impulse was applied to the ball during the collision?
in an electrically heated home the temperature of the ground in contact with a concrete basement wall is 10.5 degc. the
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