Although low luminosity stars are very common, the probability of individual stars having planets within their habitable zones is low because low luminosity stars
A) are not expected to form rocky, terrestrial planets
B) have very narrow habitable zones
C) have no habitable zones at all
D) are very unstable
B
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Energy Conservation With Conservative Forces: What is the minimum energy needed to lift a 1.0-kg rocket to a height of 200 km and to give it a speed of 8.0 km/s at that height? (Neglect air resistance and the small decrease in g over that distance.)
A. 34 TJ B. 34 kJ C. 34 MJ D. 34 GJ E. 34 J
Iron is the most stably bonded atomic nucleus
Indicate whether the statement is true or false
A 400-N crate rests on a ramp; the maximum angle just before it slips is 15.0° with the horizontal. What is the coefficient of static friction between crate and ramp surfaces?
a. 3.7 b. 0.47 c. 2.1 d. 0.27 e. 0.40
A rock that is readily attacked by chemical weathering is
A) limestone. B) granite. C) basalt. D) gneiss.