The phase of the Moon observed on the overhead
meridian at 10 A.M. local solar time is a
a) waning crescent moon.
b) waxing crescent moon.
c) waxing gibbous moon.
d) waning gibbous moon.
a
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A particle is moving at constant velocity. Its position at t = 1.0 s is 3.0 m and its position at t = 4.0 s is 15.0 m. What is the slope of the position-time graph for this particle?
a. 0, since this is a constant velocity situation. b. 4.0 m/s c. 4.0 m/s2 d. 9.0 m/s e. 12 m/s2
A track star in the broad jump goes into the jump at 10 m/s and launches himself at 20° above the horizontal. How long is he in the air before returning to Earth? Note: g = 9.8 m/s2
a. 0.35 s c. 0.70 s b. 0.42 s d. 0.89 s
Why is Jupiter denser than Saturn?
A) Jupiter has a higher proportion of hydrogen compounds and rocks than Saturn. B) Jupiter's greater mass compresses its interior to a greater extent than that of Saturn. C) Jupiter has a much more massive core than Saturn. D) Jupiter has a greater proportion of helium compared to hydrogen than Saturn.
A star with a parallax angle of 1/20 arcsecond is
A) 20 light-years away. B) 1/20 parsec away. C) 20 parsecs away. D) 10 parsecs away.