Graphite, diamond and buckminsterfullerene are different forms of the element _______
Fill in the blank(s) with correct word
carbon
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A fatal flaw with Ptolemy's model is its inability to predict the observed phases of:
A) the Sun during an eclipse. B) the Moon in its monthly cycle. C) Mercury and Venus. D) Mars and Jupiter. E) Jupiter and Saturn.
When air resistance is a factor, maximum range is achieved when the projection angle is
A) less than 45.° B) 45.° C) greater than 45.° but not 90.° D) 90.°
The direction of the Moon's revolution around
Earth is a) westward. b) eastward. c) clockwise (looking from above Earth's north pole). d) variable, because the Moon changes its orbital direction as it changes phases.
The cockroach doubling time is about 1 week. After 6 weeks of reproducing, how many cockroaches will there be stemming from an original pair?
a. 10 b. 32 c. 64 d. 128 e. 256