A cyclic process is carried out on an ideal gas such that it returns to its initial state at the end of a cycle. If the process was carried out on a clockwise sense around the enclosed area, as shown on the p-V diagram in Fig
12-2, then that area represents A) the heat added to the ideal gas.
B) the heat that flows from the ideal gas.
C) the work done by the ideal gas.
D) the work done on the ideal gas.
C
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An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, this second lens having a focal length of 8.0 cm. How far past the second lens is the final image formed?
A) 40 cm B) 35 cm C) 100 cm D) 6.5 cm E) 25 cm
A refrigerator has a coefficient of performance equal to 4.2. How much work must be done on the operating gas in the refrigerator in order to remove 250 J of heat from the interior compartment?
A) 60 J B) 120 J C) 250 J D) 480 J E) 1050 J
When warm air moves into a cold air mass, the less-dense warmer air rides up over the colder, denser air. This is very similar to
A) orographic lifting. B) adiabatic lifting. C) temperature inversion. D) what happens during a tornado.
The largest fraction of nearby stars (e.g. within 100 light years) are:
A. neutron stars B. Sun-like stars C. blue Main Sequence stars D. blue supergiants E. red dwarfs