About 50 years after Uranus was discovered:
A) its rings were discovered.
B) the retrograde motion of its orbit was observed.
C) its orbit was too far off of its predicted path to be explained by observational errors.
D) it was discovered that it had more natural satellites than any other planet.
E) it was discovered that its atmosphere was featureless.
C
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You lay on your back and watch the stars for an entire night. You focus on one star and notice that it does not rise or set, nor does it trace circles in the sky. What is your latitude on Earth? Which star would be at your zenith if you stood up? Which significant feature of the celestial sphere lies along your horizon?
What will be an ideal response?
Chemists refer to molecules containing carbon atoms as
A) carbonic B) organic C) carbonaceous D) inorganic
Energy Conservation With Conservative Forces: A roller coaster starting from rest descends 35 meters in its initial drop and then rises 23 meters when it goes over the first hill, which has a circular shape over the top. If a passenger at the top of the hill feels an apparent weight equal to one-half of her normal weight, what is the radius of curvature of the first hill? Neglect any frictional losses.
Fill in the blank(s) with the appropriate word(s).
Consider a gun with a pellet that is more massive than the gun. The firing speed is greater for the
A) pellet. B) recoiling gun. C) both are the same D) none of the above