If the composition of the upper atmosphere were altered to permit a greater amount of terrestrial radiation to escape, Earth would be
A) cooler.
B) warmer.
C) quite unaffected.
D) none of the above
Answer: A
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Banked Curves: The curved section of a speedway is a circular arc having a radius of 190 m. This curve is properly banked for racecars moving at 34 m/s. At what angle with the horizontal is the curved part of the speedway banked?
A. 32° B. 34° C. 30° D. 28° E. 26°
When light passing through a prism undergoes dispersion, the effect is a result of:
a. different wavelengths traveling at different speeds. b. different wavelengths having different indices of refraction. c. different wavelengths refracting differently. d. All of the above.
What is the temperature of 3.00 moles of an ideal gas at a pressure of 250 kPa held in a volume of 25.0 L?
A) 509 K B) 90.5 K C) 752 K D) 272 K E) 251 K
What is the magnitude of the magnetic force on a charged particle (Q = 5.0 mC) moving with a speed of 80 km/s in the positive x direction at a point where Bx = 5.0 T, By = -4.0 T, and Bz = 3.0 T?
a. 2.8 N b. 1.6 N c. 1.2 N d. 2.0 N e. 0.4 N