Conceptual Physics Chapter 18 Test Questions with Correct Answers

Conceptual Physics Chapter 18 Test Questions with Correct Answers The lowest temperature possible in nature is A) 0 degrees C. B) -273 degrees C. C) 4 K. - Answer-B) -273 degrees C. A volume of air has a temperature of 0 degrees C. An equal volume of air that is twice as hot has a temperature of A) 0 degrees C B) 64 degrees C C) 100 degrees C D) 273 degrees C E) none of the above choices are correct - Answer-D) 273 degrees C To wholly convert a given amount of heat energy into mechanical energy is A) possible using a steam engine B) possible using an atomic reactor C) possible using a simple machine D) impossible regardless of the technique used - Answer-D) impossible regardless of the technique used To totally convert a given amount of mechanical energy into heat is A) possible. B) impossible. C) impossible to answer without additional information - Answer-A) possible. The greater the difference in temperature between the input reservoir and the output reservoir for a heat engine, the A) greater the efficiency. B) less the efficiency. C) Neither - efficiency of a heat engine doesn't depend on temperature difference. - Answer-A) greater the efficiency. The first law of thermodynamics is a restatement of the A) principle of entropy. B) law of heat addition. C) Carnot cycle. D) conservation of energy - Answer-D) conservation of energy Chinook winds tend to A) warm an environment. B) cool an environment. C) cool deserts at night. D) warm deserts at sunrise. - Answer-A) warm an environment. Systems that are left alone, tend to move toward a state of A) less entropy. B) more entropy. C) no entropy. - Answer-A) less entropy.