Environmental Science - Study Mode
[#81] The range of normal human hearing is in the range of
Correct Answer
(C) 50Hz to 15000 Hz
Explanation
Solution: The human range is commonly given as 20 to 20,000 Hz, although there is considerable variation between individuals, especially at high frequencies, and a gradual loss of sensitivity to higher frequencies with age is considered normal. Sensitivity also varies with frequency, as shown by equal-loudness contours. Here, option C is correct.
[#82] At which temperature would the earth be radiating energy at the greatest rate or intensity?
Correct Answer
-5 o F
Explanation
Solution: At 105 o F the earth would be radiating energy at the greatest rate or intensity.
[#83] The ocean covers ________ percentage of Earth's surface.
Correct Answer
(C) 71%
Explanation
Solution: The oceans cover 71 percent of the Earth's surface and contain 97 percent of the Earth's water. Less than 1 percent of the Earth's water is fresh water, and 2-3 percent is contained in glaciers and ice caps. The oceans contain 99 percent of the living space on the planet.
[#84] The mean of annual rainfall in India is
Correct Answer
(B) 110 cm
Explanation
Solution: The mean of annual rainfall in India is 110 cm.
[#85] The air temperature is 45 o F, the wind is blowing at 30 MPH, and the wind chill temperature is 15 o F. These conditions would be equivalent to:
Correct Answer
(A) A 15 o F air temperature and 0 MPH winds
Explanation
Solution: The air temperature is 45 o F, the wind is blowing at 30 MPH, and the wind chill temperature is 15 o F. These conditions would be equivalent to a 15 o F air temperature and 0 MPH winds.