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.
D
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Asteroids are thought to be
a. the remains of a planet between Mars and Jupiter that broke up. b. escaped small moons. c. leftover planetesimals from the inner solar system. d. leftover planetesimals from the outer solar system.
At the same moment from the top of a building 3.0 × 102 m tall, one rock is dropped and one is thrown downward with an initial velocity of 10 m/s. Both of them experience negligible air resistance
How much EARLIER does the thrown rock strike the ground? A) 0.95 s B) 0.86 s C) 0.67 s D) They land at exactly the same time.
Which type of focus is most common for larger telescopes?
a. Cassegrain focus b. Galilean focus c. Newtonian focus d. Copernican focus e. Schmidt-Cassegrain focus
The study of the origin, large-scale structure, and future of the universe is termed