A Carnot engine is operated as a refrigerator, taking in 18. J of heat every second and expelling 20. J into a 23.°C room. What is the temperature inside the refrigerator?
A) 300. K
B) 15°C
C) -15°C
D) -6.6°C
E) 3.0°C
D
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Which of the following stars is reddish in color?
A. F6 B. A0 C. K9 D. G5 E. B2
In the inner part of the asteroid belt one is more likely to find silicate-rich asteroids, while the carbon-rich asteroids are more abundant in the outer parts of the Asteroid belt.
Answer the following statement true (T) or false (F)
In the double-slit experiment with electrons,
A) the impact point of each electron cannot be predicted, and neither can the overall pattern of impact points. B) the impact point of each electron can be predicted, but the overall pattern of impact points cannot be predicted. C) the impact point of each electron cannot be predicted, but the overall pattern can be predicted. D) the impact point of each electron can be predicted, and so can the overall pattern of impact points of a large number of electrons. E) electrons turn into giraffes.
The Triassic is a(n)
a. epoch. b. era. c. eon. d. period.