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
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Determine the rms current for the circuit
a.
55 mA
b.
77 mA
c.
99 mA
d.
0.19 A
e.
61 mA
A force of 15.0 N is applied to a wire with a diameter of 2.00 mm. If the wire changed length by 1.20 mm, then the stress in the wire is
a. 
b. 
c. 
d. 
e. 
A satellite is moved from a low orbit to one that is twice as far from Earth. Its weight at its new orbit is ________.
A. unchanged B. increased by a factor of 2 C. decreased by a factor of 2 D. decreased by a factor of 4 E. There is no gravity in space.
The various isotopes of an element all have
a. the same number of protons but different numbers of neutrons. b. the same total number of neutrons and protons. c. the same number of neutrons but different numbers of protons. d. the same number of neutrons and the same number of protons.