The international time standard is
a. GMT.
b. UTC.
c. solar time.
d. Zulu.
b
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The center of our galaxy lies in the direction of (but far beyond) the stars in the constellation of
a. Ursa Minor. b. Ursa Major. c. Sagittarius. d. Orion. e. Monoceros.
It is often possible to use atomic masses when calculating the binding energy of a nucleus. This is not true for calculating the Q value for the e+ decay process since
a. the electron masses do not cancel. b. a positron is an antiparticle. c. the electron masses cancel. d. the mass of a positron cannot be neglected when compared to the mass of a nucleus. e. none of the above.
An observer is moving in space toward a distant star at 200 km/s while the star is moving toward the observer at 400 km/s; the relative velocity being 600 km/s of approach. What relative change in frequency of the light from the star as seen by the observer? (The speed of light in space is 3.00 × 10^5 km/s)
a. 0.067% increase c. 0.20% increase b. 0.20% decrease d. 0.033% decrease
If an object feels cold to the touch, the only statement that you can make that must be correct is that
a. the object has a smaller coefficient of thermal conductivity than your hand. b. the volume of the object will increase while it is in contact with your hand. c. the object contains less thermal energy than your hand. d. the object is at a lower temperature than your hand. e. the object cannot be a liquid.