When light passes from air through a prism, light of all frequencies
A. remain at speed c.
B. slow down.
C. speed up.
D. none of the above
Answer: B
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Which of the following statements is true?
A. Meridians are points for measuring location in the E-W direction, and parallels are points for measuring location in the N-S direction. B. Meridians are lines for measuring location in the N-S direction, and parallels are lines for measuring location in the E-W direction. C. Meridians are points for measuring location in the N-S direction, and parallels are points for measuring location in the E-W direction. D. Meridians are lines for measuring location in the E-W direction, and parallels are lines for measuring location in the N-S direction.
Smog is responsible for which of the following?
a) An estimated 50,000–180,000 premature deaths in the U.S. annually. b) A global reduction in agricultural productivity. c) Extensive damage to forests. d) All of the above.
All glacial deposits are included within the general term ____
a. outwash b. moraine c. drift d. till
If a slope in unconsolidated material is unstable due to high water content,
A. it may best be stabilized by covering the slope with impermeable material. B. it may be stabilized by steepening the slope angle. C. nothing can be done to modify the hazard. D. it may be dewatered by installation of drainage pipes.