The physics underlying the redness of sunsets and the color of blue jays involves
A) scattered sunlight.
B) absorbed sunlight.
C) different processes for sunsets and blue jays.
Answer: A
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A high tide is occurring at Charleston, South Carolina (80°W, 33°N). What two longitudes are experiencing low tide?
a. 10°E and 170°E b. 10°W and 170°W c. 10°E and 170°W d. 10°W and 170°E
What is the kinetic energy of an electron that passes undeviated through perpendicular electric and magnetic fields if E = 4.0 kV/m and B = 8.0 mT?
a. 0.65 eV b. 0.71 eV c. 0.84 eV d. 0.54 eV e. 1.4 eV
A rock is under water in a shallow lake. As the rock sinks deeper and deeper into water, the buoyant force on it
A) decreases. B) increases. C) remains constant.
Sound travels faster in air if the air temperature is
A) warm. B) cold. C) average. D) any of the above