Outside it is 11∘C (52∘F), and inside your house you maintain 23∘C (73∘F). By how many...
Outside it is 11∘C (52∘F), and inside your house you maintain 23∘C (73∘F). By how many percent could you reduce your heating bill if you reduced the inside temperature by 4∘C to 19∘C (66∘F)? Consider only heat loss by conduction through the walls and roof, and assume that your bill is proportional to your energy consumption.
Homework Answers
we know, rate of flow of heat is proportional to diffrence in temperature of room and out side temperature.
so,
New Bill/Old Bill = (19 - 11)/(23 - 11)
= 0.667
= 66.7%
New Bill = 66.7% of old Bill
so, heating bill will be redued by = (100 - 66.7)
= 33.3% <<<<<<<<---------Answer
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