Corre question 27 correct 100 points out of 100

Question
27
Correct
1.00 points out of 1.00
Consider a comet in a long, thin elliptical orbit with a semi-major axis of 1 AU. What can you say about the orbital period of this comet?
Select one:
A. It will be one year.
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B. It will be less than one year.
C. It is not possible to determine the comet's sidereal period without knowing the eccentricity of its orbit.
D. It will be more than one year.
Question
28
Correct
1.00 points out of 1.00
In which order (from earliest to latest) did the following people make their major contributions to astronomy?
Question
29
Correct
Select one:
1.00 points out of 1.00
A person orbiting the Earth in the Space Shuttle feels weightless because
Select one:
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Question
31
Correct
1.00 points out of 1.00
What path would a planet (like the Earth!) take if the force of gravity from the Sun were to be suddenly removed?
Select one:
A. The planet would move in a straight line outward, directly away from the Sun's position.
B. The planet would begin to move in a long ellipse with the Sun at one focus.
Question
32
Correct
1.00 points out of 1.00
B. 2.5 times greater
C. 10 times greater
D. 6.25 times greater
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C. her mass is zero in space, and weight requires mass.
D. no forces act on her.
Question
30
Correct
1.00 points out of 1.00
The largest telescope at Kitt Peak National Observatory is the Mayall 4-meter Telescope. The two Keck telescopes in Hawaii each have a
diameter of 10 meters. How much greater is the light-gathering power of one Keck telescope than that of the Mayall telescope?
Select one: