AIM: Pancaek Beast | E-mail: shdwdde@gmail.com | Denny's House of Pancaeks
17.99 Hot Air in a Physics Lecture
a) A typical student listening attentively to a physics lecture has a heat output of 100 W. How much heat energy does a class of 90 physics students release into a lecture hall over the course of a 50-minute lecture?
b) Assume that all of the heat energy in part (a) is transferred to the 3200 m^3 of air in the room. The air has a specific heat capacity 1020 J/kgK and density 1.20kg/m^3. If none of the heat escapes and the AC system is off, how much will the T rise during the 50-min lecture?
c) If the class is taking an exam, the heat output per student rises to 280 W (2800 for me). What is the temperature rise during 50 min in that case?
Hot.
SD
Tuesday, August 28, 2007
Tuesday, August 28, 2007
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