A gasoline engine absorbs 2500 J of heat and performs 1000 J of mechanical work in each cycle. The amount of heat expelled in each cycle is

A. 1000 J
B. 1500 J
C. 2000 J
D. 500 J
E. 3000 J


Answer: B

Physics & Space Science

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If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will be

A) 50 m/s. B) 500 m/s. C) 3000 m/s. D) 3600 m/s.

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According to your textbook, popular confusion is lessened when applying Heisenberg's uncertainty principle by heeding the distinction between

A) momentum and energy. B) energy and time. C) passive observation and probing.

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13.0 g of water in a 3.25-L pressure vessel is heated to 480°C. What is the pressure inside the container? (R = 0.082 L/atm/mol/K, one mole of water has a mass of 18 grams)

a. 24.7 atm b. 13.7 atm c. 8.75 atm d. 15.7 atm e. 19.8 atm

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In general, elements that have four to eight electrons in their valence shell are

a. semimetals. b. metalloids. c. nonmetals. d. metals.

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