When work is done by a system and no heat is added, the temperature of the system
A) increases.
B) decreases.
C) remains unchanged.
Answer: B
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A student plots data for the velocity of a body versus the time on a graph. The area under the curve on the graph may be identified as
A. average velocity. B. distance. C. average speed. D. acceleration.
As the temperature of a radiation emitting blackbody becomes lower, what happens to the peak wavelength of the radiation?
a. remains constant b. increases c. decreases d. is directly proportional to temperature
This figure shows hydrogen's three isotopes: (a) hydrogen, (b) deuterium, and (c) tritium. How many protons and neutrons does the isotope oxygen 15 have?
a. 7 protons and 8 neutrons b. 8 protons and 7 neutrons c. 8 protons and 15 neutrons d. 15 protons and 8 neutrons e. 8 protons and 15 neutrons
The nadir marks the point of the celestial sphere directly above your head
a. True b. False Indicate whether the statement is true or false