A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative y direction. Which one of the following statements about the magnetic field at point P can be determined from this data?
a. Bx is positive.
b. Bz is positive.
c. By is negative.
d. By is positive.
e. Bx is negative.
a
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Entropy is a measure of
A) messiness. B) disorder. C) both of the above D) none of the above
If a star appears to move relative to other stars over a one-year period, this motion is due to the star's
A) transverse motion. B) radial motion. C) parallax shift. D) Doppler shift. E) true space motion.
If an AC circuit consists of a 220 mH inductor in series with a 75 k 
resistor and an AC generator with rms voltage of 12 V. At what frequency will the rms voltage drop across the resistor be equal to that across the inductor?
A. 114 kHz B. 5.5 kHz C. 875 Hz D. 18 kHz
_________ stresses are stresses in a material that are not caused by an external applied force.
Fill in the blank(s) with the appropriate word(s).