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10 Nov 2019
During 4 hours one winter afternoon, when the outside temperaturewas 11° C, a house heated by electricity was kept at 24° C with theexpenditure of 58 kwh (kilowatt·hours) of electric energy.
(a) What was the average energy leakage in joules per second(watts) through the walls of the house to the environment (theoutside air and ground)?
(b) The rate at which energy is transferred between two systems dueto a temperature difference is often proportional to theirtemperature difference. Assuming this to hold in this case, if thehouse temperature had been kept at 27° C (80.6° F), how many kwh ofelectricity would have been consumed?
During 4 hours one winter afternoon, when the outside temperaturewas 11° C, a house heated by electricity was kept at 24° C with theexpenditure of 58 kwh (kilowatt·hours) of electric energy.
(a) What was the average energy leakage in joules per second(watts) through the walls of the house to the environment (theoutside air and ground)?
(b) The rate at which energy is transferred between two systems dueto a temperature difference is often proportional to theirtemperature difference. Assuming this to hold in this case, if thehouse temperature had been kept at 27° C (80.6° F), how many kwh ofelectricity would have been consumed?
johnjehu68Lv6
24 Jan 2023
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Sixta KovacekLv2
21 Jun 2019
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