Planetary nebulae are sites of planet formation
Indicate whether the statement is true or false
F
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What defines the habitable zone around a star?
A) the region around a star where rocky planets can form B) the region around a star where humans can survive C) the region around a star where liquid water can exist on planetary surfaces D) the region around a star where its ultraviolet radiation is too weak to destroy biological organisms on a planetary surface E) the region around a star outside of its hot, tenuous corona
A 1-kg ball dropped from 2 m rebounds only 1.5 m after hitting the ground. The amount of energy converted to heat is about
A) 0.5 J. B) 1.0 J. C) 1.5 J. D) 2.0 J. E) more than 2.0 J.
An empty spice bottle has an inner volume of 1.31 × 10?4 m3. It has a mass of 112 g when filled with air, and it displaces 1.63 × 10?4 m3 of water when fully submerged. What volume of mercury (?Hg = 13.6 × 103 kg/m3) must be added to the empty bottle so that it will just submerge?
A. 3.75 cm3 B. 12.0 cm3 C. 101 cm3 D. 147 cm3 E. 237 cm3
At what longitude is an observer who sees the last-quarter moon on his meridian when it is 12:00 noon local solar time at 75°W?
a. 165°W b. 15°E c. 15°W d. 165°E e. 75°E