__________ in Earth's atmosphere absorbs most ultraviolet radiation coming from the Sun
a. Methane b. Three bound oxygen atoms
c. Water vapor d. Carbon dioxide
b
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Graphical Analysis: If the velocity versus time graph of an object is a horizontal line, the object is
A. moving with zero acceleration. B. moving with constant non-zero acceleration. C. at rest. D. moving with increasing speed.
A heat engine operating at maximum efficiency has an efficiency of 35.0%. The temperature of the hot reservoir is 700 K. What is the temperature of the cold reservoir?
A) 200 K B) 245 K C) 350 K D) 455 K E) 600 K
A 1-kg mass at the Earth's surface weighs
A) 1 N. B) 5 N. C) 10 N. D) 12 N. E) none of the above
Microwave radiation is useful in which of the following?
a. sending phone messages b. cooking food c. aircraft navigation d. All of the above are valid choices.