At a distance of 10 km from a radio transmitter, the amplitude of the E-field is 0.20 volts/meter. What is the total power emitted by the radio transmitter?
a. 10 kW
b. 67 kW
c. 140 kW
d. 245 kW
e. 21 kW
B
You might also like to view...
Our Sun will first become a red giant, then a white dwarf, and finally a brown dwarf
Indicate whether the statement is true or false
Although Earth's gravitational influence gets weaker with distance, we believe that it extends as far as the
A. Sun. B. edge of the solar system. C. edge of the galaxy. D. universe extends.
A trapeze artist, with swing, weighs 700 N; he is being held to one side by his partner so that the swing ropes make an angle of 30.0° with the vertical. In such a condition of static equilibrium what is the tension in the rope?
a. 924 N c. 808 N b. 404 N d. 233 N
A rocket in space fires its engines continuously until it runs out of fuel. Describe the motion of the rocket.
A. The rocket's speed is a constant value until the engines stop firing, and then coasts to a stop. B. The rocket's speed increases until its engines stop firing, and then coasts to a stop. C. The rocket does not move, as the engines have nothing to push against. D. The rocket's speed does not change, and it continues to move in a straight line. E. The rocket's speed increases until its engines stop firing, and then coasts in a straight line.