The sky appears "blue" because of
A) Bragg's Law.
B) Rayleigh scattering.
C) Brewster's polarization.
D) dichroism.
E) birefringence.
B
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A large and a small person wish to parachute at equal terminal velocities. The larger person should
A) get a larger parachute. B) jump lightly. C) pull upward on the supporting strands to decrease the downward net force. D) jump first from the plane.
An observer will measure the wavelength of waves emanating from a source that is moving away as longer than it really is
Indicate whether the statement is true or false
A wheel rotates through an angle of 13.8 rad as it slows down uniformly from 22.0 rad/s to 13.5 rad/s. What is the magnitude of the angular acceleration of the wheel?
A) 0.616 rad/s2 B) 5.45 rad/s2 C) 111 rad/s2 D) 22.5 rad/s2 E) 10.9 rad/s2
Solar winds headed in Earth's direction are deviated mainly by
A) the upper atmosphere. B) the troposphere. C) Earth's magnetic field. D) Earth's radiation belts.