Environmental Science
How much radiant energy will an object emit if its temperature is at absolute zero?

None
The maximum theoretical amount
Depends on the chemical composition of the object
The same as it would at any other temperature

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Environmental Science
The wind-chill factor:

Relates body heat loss with wind to an equivalent temperature with no wind
Determines how low the air temperature will be on any given day
Takes into account humidity and air temperature in expressing the current air temperature
Tells farmers when to protect crops from a freeze
Indicates the temperature at which water freezes on exposed skin

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