A Carnot air conditioner has a coefficient of performance of 17.0 and removes 72.0 MJ of thermal energy from the interior of a house every hour. How much power does it consume?
A) 1180 W
B) 1320 W
C) 520 kW
D) 3.14 MW
E) 1.25 MW
A
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The element first found in the Sun's spectrum, then on Earth 30 years later, is:
A) hydrogen. B) helium. C) solarium. D) technetium. E) aluminum.
A solenoid with a certain number of turns N and carrying a current of 2.000 A has a length of 34.00 cm. If the magnitude of the magnetic field generated at the center of the solenoid is 9.000 mT, what is the value of N?
A) 860.0 B) 1591 C) 2318 D) 3183 E) 1218
What is the net power that a person with surface area of 1.20 m2 radiates if his emissivity is 0.895, his skin temperature is 27°C, and he is in a room that is at a temperature of 17°C? (? = 5.67 × 10-8 W/m2 ? K4)
A) 60.3 W B) 62.6 W C) 65.7 W D) 68.4 W E) 64.8 W
Angular Quantities: Through how many degrees does a 33 rpm turntable rotate in 0.32 s?
A. 63° B. 35° C. 46° D. 74°