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The wind-chill factor

This question belongs to General Knowledge Environmental Science
Environmental Science
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The wind-chill factor:

Answer & Solution
Correct Answer: Option A
Wind-chill or windchill is the lowering of body temperature due to the passing-flow of lower-temperature air. Wind chill numbers are always lower than the air temperature for values where the formula is valid. When the apparent temperature is higher than the air temperature, the heat index is used instead.
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