Which object is hotter?
A. Object 2 at T = 0° F
B. Object 1 at T = 0° C
C. Object 3 at T = 0 K
Answer: B
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Suppose that both the Sun and a distant star cross your meridian at exactly 12:00 noon today. At about what time will the star cross your meridian tomorrow?
A) 11:56 a.m. B) 12:00 noon C) 12:10 p.m. D) 9:00 a.m. E) 3:00 p.m.
The primary coil of an ideal transformer has 100 turns and its secondary coil has 400 turns. If the ac voltage applied to the primary coil is 120 V, what voltage is present in its secondary coil?
A) 100 V B) 30 V C) 70 V D) 480 V E) 400 V
____ is the point in Earth's orbit where Earth is closest to the Sun
a. Aphelion b. Perihelion c. Precession d. The winter solstice e. a and d
Which of the following statements is not true about the planets so far discovered around other stars?
A) Photographs reveal that most of them have atmospheres much like that of Jupiter. B) Many of them have been discovered by observing Doppler shifts in the spectra of the stars they orbit. C) Most of them are more massive than Earth. D) Many of them orbit closer to their star than Jupiter orbits the Sun.