What are the possible charges of a quark (not an antiquark)?
A) -e, 0, e
B) -2/3 e, -1/3 e, +1/3 e, +2/3 e
C) -2/3 e, +1/3 e
D) -1/3 e, +2/3 e
E) -1/3 e, +1/3 e
D
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Have objects like Jupiter been found? How?
A. No, only Earth-like planets have been found. B. Yes, cool Jupiters have been found from the microlensing method. C. No, only Mars-like planets have been found. D. Yes, hot Jupiters have been found from the radial velocity method. E. Yes, warm Jupiters have been found from the transit method.
A gyroscope consists of a wheel mounted on an axle aligned along a north-south direction. The south end of the axle is suspended by a rope attached to the ceiling, and the north end is manually held at rest. The wheel is spinning rapidly, so that its angular momentum vector points north. Suddenly the north end is released. Since there is spin, the north end of the axle will begin to move
A. west. B. north. C. south. D. east. E. down.
Which process will double the power given off by a resistor?
a. doubling the current while doubling the resistance b. doubling the current by making a resistance half as big c. doubling the current by doubling the voltage d. doubling the current while making the voltage half as big
Centrifugal forces are
A. Real. B. Fictitious. C. Real if we are in a rotating frame.