The bottom of the stratosphere is called the
a. stratopause.
b. tropopause.
c. mesopause.
d. thermopause.
b
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If the material that formed the Moon was debris from a collision between the early Earth and another body, what can we predict about the composition of moon rocks collected by Apollo astronauts?
A. Moon rocks should have some similar and some different compositional characteristics. B. Moon rocks should have the same composition as rocks found on and inside Earth. C. Moon rocks should have a composition that is the same as Earth's crust. D. Moon rocks should have a completely different composition than rocks found on Earth.
To which group of polymers does polystyrene belong?
a. Natural b. Hydrolytic c. Addition d. Condensation
Angela claims that she wears a cylindrical-shaped hollow gold bracelet because it expands less than a solid one with a change in temperature. Clarissa claims that a cylindrical-shaped solid gold bracelet expands less than a hollow one. Which one, if either, is correct?
a. Angela, because the bracelet expands outward on its outer surface and inward on its inner surface. b. Clarissa, because the bracelet expands outward on its outer surface and inward on its inner surface. c. Angela, because the inner circumference does not change, but the outer circumference expands. d. Clarissa, because the inner circumference does not change, but the outer circumference expands. e. Neither, because both the inner and outer circumferences increase in length.
In a two-slit experiment, there are 11 bright fringes within the central diffraction maximum. What is the ratio of the slit width to the slit separation?
A. 5 B. 1/6 C. 1/5 D. 6