A waxing phase of the Moon can be seen
a. 10 days after a full moon.
b. 10 days after a new moon.
c. 10 days before a new moon.
d. none of these
b
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All know forms of life on Earth use _______ as a medium for chemical reactions
a. gaseous helium b. gaseous helium c. frozen carbon dioxide d. liquid water e. frozen water
What law explains why a collapsing cloud usually forms a protostellar disk around a protostar?
A) conservation of angular momentum B) Kepler's third law C) the universal law of gravitation D) Wein's law
The rate of energy flow per unit area of an electromagnetic wave has an average value of 0.695 W/m2. The wave is incident at right angles upon a rectangular area measuring 1.5 m by 2.0 m
How much total energy falls upon this rectangle each minute? (?0 = 8.85 × 10-12 C2/N ? m2, ?0 = 4? × 10-7 T ? m/A, c = 3.0 × 108 m/s) A) 130 J B) 160 J C) 190 J D) 220 J E) 250 J
If you take 6 litres of air from the surface to 20 metres/66 feet, the volume will be __________ litres.
a. 1 b. 2 c. 3 d. 4