An ideal Carnot air conditioner operates between an indoor temperature of 20°C and an outdoor temperature of 39°C. How much energy does it use to remove 2000 J of thermal energy from the interior of the house?
A) 105 J
B) 130 J
C) 780 J
D) 520 J
E) 340 J
B
You might also like to view...
Using the following unit conversions: 1.00 fluid ounce = 29.573 ml, 1.00 L = 1000 
density of water = 
the number of fluid ounces in a kg of water is
A. 48.8 fluid ounces. B. 40.1 fluid ounces. C. 33.8 fluid ounces. D. 25.7 fluid ounces.
The clouds of Mars consist mainly of frozen carbon dioxide and frozen water.
Answer the following statement true (T) or false (F)
Ideal monatomic gas A is composed of molecules with mass m while ideal monatomic gas B is composed of molecules with mass 4m. The average molecular speeds are the same if the ratio of the temperatures TA/TB is:
A. 1/4 B. 1/2 C. 1 D. 2 E. 4
When resistors with different resistances are connected in parallel, which of the following must be the same for each resistor? Choose all correct answers
1.potential difference 2.current 3.power delivered 4.charge entering 5.none of these answers