The sky is blue because of
a. interference.
b. diffraction.
c. scattering.
d. dispersion.
e. polarization.
c
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Relative Velocity: A swimmer heading directly across a river that is 200 m wide reaches the opposite bank in 6 min 40 s. During this swim, she is swept downstream 480 m. What is the speed of the current?
A. 0.50 m/s B. 0.80 m/s C. 1.2 m/s D. 1.4 m/s E. 1.8 m/s
Isaac Newton first became famous for his contributions to the understanding of
A) the laws of mechanics. B) the law of gravity. C) light.
From the Earth, the Earthlings see the Enterprise approaching from the west at 0.800c and the Klingons approaching from the east at 0.900c
What speed, in terms of the speed of light, does the crew of the Enterprise measure for the Klingon ship?
Which of the following is NOT a true statement about the relationship between the thermal expansion of a solid and the potential energy of an ion in a solid?