An ideal heat pump is used to maintain the inside temperature of a house at Tin = 21 °C when the outside temperature is Tout - Assume that when it is operating, the heat pump does work at a rate of 1400 W. Also assume that the house loses heat Part A For what outside temperature would the heat pump have to operate at all times in order to maintain the house at an inside temperature of 21 °C? via conduction through its walls and other surfaces at a rate given by (650 W/°C)(Tin – Tout ). Express your answer as an integer and include the appropriate units Tout = 269 K Submit Previous Answers v Correct Correct answer is shown. Your answer 257 K was either rounded differently or used a different number of significant figures than required for this part.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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need help with part B

Constants I Periodic Table
An ideal heat pump is used to maintain the inside
temperature of a house at Tin = 21 °C when the
outside temperature is Tout . Assume that when it is
operating, the heat pump does work at a rate of
1400 W . Also assume that the house loses heat
Part A
For what outside temperature would the heat pump have to operate at all times in order to maintain the house at an inside
temperature of 21 °C?
via conduction through its walls and other surfaces
at a rate given by (650 W/°C)(Tin – Tout).
Express your answer as an integer and include the appropriate units
Tout
269 K
%3D
Submit
Previous Answers
Correct
Correct answer is shown. Your answer 257 K was either rounded differently or used a different number of
significant figures than required for this part.
Part B
If the outside temperature is 8°C, what percentage of the time does the heat pump have to operate in order to maintain
the house at an inside temperature of 21 °C?
Express your answer using two significant figures.
?
31
P Pearson
Transcribed Image Text:Constants I Periodic Table An ideal heat pump is used to maintain the inside temperature of a house at Tin = 21 °C when the outside temperature is Tout . Assume that when it is operating, the heat pump does work at a rate of 1400 W . Also assume that the house loses heat Part A For what outside temperature would the heat pump have to operate at all times in order to maintain the house at an inside temperature of 21 °C? via conduction through its walls and other surfaces at a rate given by (650 W/°C)(Tin – Tout). Express your answer as an integer and include the appropriate units Tout 269 K %3D Submit Previous Answers Correct Correct answer is shown. Your answer 257 K was either rounded differently or used a different number of significant figures than required for this part. Part B If the outside temperature is 8°C, what percentage of the time does the heat pump have to operate in order to maintain the house at an inside temperature of 21 °C? Express your answer using two significant figures. ? 31 P Pearson
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