Which of the following appears least important in the evolution of life here?
A) the magnetic field of the Earth
B) the correct distance from the Sun
C) an Earth-like atmosphere
D) the presence of water and carbon atoms
E) the stable luminosity of the Sun for billions of years
A
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Where on the celestial sphere would you look for the planets?
A. in the zodiac (near the ecliptic)
B. on the galactic equator
C. at the north celestial pole
D. on the celestial equator
Exhibit 12-2
The figure below shows a graph of angular velocity versus time for a man bicycling around a circular track.
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Use this exhibit to answer the following question(s).
Refer to Exhibit 12-2. What is his average angular acceleration, in rad/s2, in the first 10 minutes?
A.
B.
C.
D.
E.
We now know of polar caps on Mercury, the Moon, Earth, and Mars
Indicate whether the statement is true or false
A 1500-kg car moving at 25 m/s hits an initially uncompressed horizontal ideal spring with spring constant (force constant) of 2.0 × 106 N/m. What is the maximum distance the spring compresses?
A) 0.17 m B) 0.34 m C) 0.51 m D) 0.68 m