Which of the following is essential for lake-effect snow to occur near the Great Lakes?
A. cold water
B. open water
C. warm air
D. ice-covered water
Answer: B
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In Example 3.10, we calculated the amount of natural gas that you would burn to heat 20 gallons of water from room temperature at 70°F to 120°F to take a shower. Determine the additional amount of gas that must be burned if the water heater has an efficiency of (a) 80 percent, (b) 85 percent, and (c) 90 percent.
What will be an ideal response?
What percentage of parent isotope is remaining if 1 half life has elapsed?
- 6.25%
- 12.5%
- 25%
- 50%
- 100%
Which map projection is best at eliminating distortion?
A) Robinson projection. B) Albers equal-area projection. C) Mercator projection. D) All map projections distort.
Which region of the sun's electromagnetic spectrum is most responsible for human skin cancer?
A) infrared B) ultraviolet C) visible D) near infrared