If you think of a battery as an electric charge "pump," the battery voltage is analogous to __________
Fill in the blank(s) with correct word
pressure
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Overall, current data suggest that ________ of stars are orbited by one or more planets.
A) at least about 70% B) approximately 1% C) approximately 20% D) no more than 30%
The seasonal polar caps which appear and disappear with the seasons on Mars are made of
A) methane ice B) carbon dioxide ice C) water ice D) a uniform mixture of water and carbon dioxide ices
Steel blocks A and B, which have equal masses, are at TA = 300 °C and TB = 400 °C. Block C, with mC = 2mA, is at TC = 350 °C. Blocks A and B are placed in contact, isolated, and allowed to come into equilibrium. Then they are placed in contact with block C. At that instant,
a. TA = TB < TC. b. TA = TB = TC. c. TA = TB > TC. d. TA + TB = TC. e. TA - TB = TC.
One end of a copper rod is in thermal contact with a hot reservoir at T = 500 K and the other end is in thermal contact with a cooler reservoir at T = 300 K. Find the entropy change of each reservoir, and the total entropy change, when 8 000 J of heat energy are conducted from one end of the rod to the other with no change in the temperature distribution in the rod