If you find yourself in a locality where the magnetic declination is "15.° East," in which direction is true North in relation to a compass needle?
What will be an ideal response?
"15° East" means the compass is pointing 15° East of true North. So true North would be 15° WEST of the compass direction.
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Which of the following typically orbit within the disk of our galaxy?
A) stars of spectral types O and B B) globular star clusters C) the Large and Small Magellanic Clouds D) other galaxies
A 10.0-? resistor, 10.0-mH inductor, and 10.0-?F capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements.
What will be an ideal response?
If a person weighs 150 lb on Earth, what will the person weigh on the Moon?
a. 25 lb b. 900 lb c. 150 lb d. 75 lb e. 300 lb
Three long wires parallel to the x axis carry currents as shown. If I = 20 A, what is the magnitude of the magnetic field at the origin?
a.
37 ?T
b.
28 ?T
c.
19 ?T
d.
47 ?T
e.
58 ?T