What are the inorganic materials in soil derived predominantly from
What will be an ideal response?
Sand, Silt, Clay
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Tycho Brahe's greatest contribution to astronomy was
a. his model of the universe. b. his telescopic observations. c. his discovery of three laws of motion. d. his 20 years of careful observations of the planets. e. a and b above
A machine that promises more energy output than input is
A) a fantasy. B) commonplace in today's technology. C) a long-shot worth investing in.
The polar caps on Mars are composed of
A) pure solid carbon dioxide. B) pure water ice. C) mostly solid carbon dioxide and some water ice. D) mostly water ice and some solid carbon dioxide. E) There are no polar caps on Mars.
Monochromatic light (? = 500 nm) is incident on a soap bubble (n = 1.40). How thick is the bubble (in nm) if destructive interference occurs in the reflected light?
A. 102 B. 179 C. 54 D. 1 E. 89