Why are Saturn's rings so noticeable?
A) They are made of metallic hydrogen.
B) They are made of lots of fresh, bright icy particles from a recent breakup.
C) The particles in the rings are highly polished from numerous collisions with other particles.
D) They are made of nitrogen frost, like the bright surface of Triton.
E) Saturn is so bright, the rings reflect a lot of light from both Saturn and the Sun.
B
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Which of the following has the greatest number of significant figures?
A) 03.1400 B) 314.1 C) 3.142 D) 000.3140 E) 0.003142
Light waves are
A) beams of moving electrons and other charged particles. B) beams of moving atoms. C) traveling disturbances in an electromagnetic field. D) traveling disturbances in the ether. E) traveling disturbances in the air.
In terms of mass, Jupiter is made mostly of
a. rock. b. molten iron. c. water. d. hydrogen and helium. e. carbon dioxide.
The speed of light is
A) 300 km/s. B) 3 million km/s. C) 3 km/s. D) 3,000 km/s. E) None of the above.