A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in one light-year? (1 mi = 1609 m, 1 y = 365 d)
A) 9.46 × 1015 mi B) 9.46 × 1012 mi C) 5.88 × 1012 mi D) 5.88 × 1015 mi
C
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Predict the next panel in the spectral sequence of the binary star system shown above
a. a
b. c
c. b
d. None of the other choices are correct.
In a Western movie, a person shoots an arrow backward from a fleeing horse. If the velocity of the horse relative to the ground is 13 m/s west and the arrow’s velocity relative to the horse is 38 m/s east, what is the arrow’s velocity with respect to the ground?
A. 41 m/s east B. 41 m/s west C. 25 m/s east D. 25 m/s west
What is true about the stellar populations in the Galaxy?
A) Most open clusters are in the halo. B) The bluest stars are in the halo. C) Only old stars are found in the halo. D) The main star forming regions are outside the Galactic plane. E) Red stars are only found in the bulge.
How long does it take for Earth to revolve around the Sun?
A) one day B) one week C) one month D) one year