Consider two spaceships, each traveling at 0.50c in a straight line. Ship A is moving directly away from the Sun and ship B is approaching the Sun. The science officers on each ship measure the velocity of light coming from the Sun
What do they measure for this velocity? A)
Ship A measures it as less than c, and ship B measures it as greater than c.
B)
Ship B measures it as less than c, and ship A measures it as greater than c.
C)
On both ships it is measured to be less than c.
D)
On both ships it is measured to be exactly c.
D
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Consider the spectra of the four objects shown beneath the laboratory spectrum. Based on these spectra, what can you conclude about Object 1?
A) It is moving away from us. B) It is composed mostly of hydrogen, helium, and iron. C) It is a star with a thin upper atmosphere. D) It is a hot object, with a temperature above 1 million K. E) It is moving toward us.
What are comets made of?
A) silicates and rocky dust B) metallic dust particles C) dark colored complex hydrocarbons D) methane, ammonia, and water ice E) All of the above.
A 60.0-kg mass person wishes to push a 120-kg mass box across a level floor. The coefficient of static friction between the person's shoes and the floor is 0.700
What is the maximum coefficient of static friction between the box and the floor such that the person can push horizontally on the box and cause it to start moving? A) 0.333 B) 0.500 C) 0.350 D) 0.667 E) 0.700
The rotation periods of Venus, Jupiter, Saturn, Uranus and Neptune are difficult to determine because:
A) they rotate so fast. B) they are all gas giants. C) they are so far away from the Sun. D) their surface features are obscured by their atmospheres. E) each one has a large satellite that interferes with this measurement.