On a clear day, the sky appears to be more blue toward the zenith (overhead) than it does toward the horizon. This occurs because
A)
the atmosphere is denser higher up than it is at the Earth's surface.
B)
the temperature of the upper atmosphere is higher than it is at the Earth's surface.
C)
the sunlight travels over a longer path at the horizon, resulting in more scattering.
D)
none of the given answers
C
You might also like to view...
Standing Sound Waves: The lowest tone to resonate in a pipe of length L that is closed at one end but open at the other end is 200 Hz. Which one of the following frequencies will not resonate in that pipe?
A. 200 Hz B. 400 Hz C. 600 Hz D. 1000 Hz E. 1400 Hz
Einstein's cosmological constant is a leading candidate for the "dark energy."
Indicate whether the statement is true or false
A mass m is attached to a vertical spring with a force constant k, it oscillates with a period T. If the spring is cut to one third of its original length and the same mass is attached to it, the new period of oscillation will be
A) less than T. B) greater than T. C) equal to T. D) It could be greater or less than T, depending on how you cut the spring.
Exhibit 16-1
A graph of position versus time for an object oscillating at the free end of a horizontal spring is shown below.
?
?
Use this exhibit to answer the following question(s).
Refer to . The point at which the object has negative velocity and zero acceleration is
a.
A
b.
B
c.
C
d.
D
e.
E