When considering the number of technologically advanced civilizations in our galaxy, it is useful to consider
a. the average life span of an alien.
b. the average life span of the civilization.
c. the distance to the civilization's planet.
d. the type of advanced communication they use.
b
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The point in Earth's orbit where Earth is farthest from the sun is known as
a. aphelion. b. perihelion. c. precession. d. the winter solstice e. a and d
Albert uses as his unit of length (for walking to visit his neighbors or plowing his fields) the albert (
A), the distance Albert can throw a small rock. One albert is 92 meters. How many square alberts is equal to one acre? (1 acre = 43,560 ft2 = 4050 m2)
Compared to a single lamp connected to a battery, two lamps connected in parallel to the same battery will draw
A) more current. B) less current. C) the same current.
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 × 10^3 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