A group of twenty executives attend a board meeting in a room that measures 20 feet by 20 feet and has a 10-foot ceiling. Suppose each person occupies 2.5 feet and gives out about 375 BTUs of heat per hour. Calculate the temperature rise that occurs within 20 minutes of the start of the conference if the room is completely sealed and insulated, Take c for air as 0.1825 BTU / Lbmd Ibm ° F.

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Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.