An electric heating blanket is subjected to an acceptance test. It is to dissipate 400 W on

Question:

An electric heating blanket is subjected to an acceptance test. It is to dissipate 400 W on the high setting when hanging in air at 20?C. If the blanket is 1.3 m wide:(a) What is the length required if its average temperature at the high setting is to be 40?C, and(b) If the average temperature at the low setting is to be 30?C, what rate of dissipation would be possible?GIVENAn electric blanket hanging in airHeat dissipation rate (qh) = 400 WAir temperature (T??) = 20?CBlanket width (w) = 1.3 mAverage temperatures: high (Tsh) = 40?Clow (Ts1) = 30?CASSUMPTIONSAir is stillMoisture in the air has a negligible effectBlanket is hung vertically with its 1.3 m sidesvertical