__________ results because the speed of light in a transparent medium varies with frequency
Fill in the blank(s) with correct word
Dispersion
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A uniform rod is 2.0 m long. The rod is pivoted about a horizontal, frictionless pin through one end. The rod is released from rest at an angle of 30° above the horizontal. What is the angular acceleration of the rod at the instant it is released?
a. 4.7 rad/s2 b. 6.9 rad/s2 c. 6.4 rad/s2 d. 5.6 rad/s2 e. 4.2 rad/s2
The nucleus, or main solid body, of a comet has a typical size of
A) a few centimeters. B) a few meters. C) a few kilometers. D) a few hundred kilometers. E) a few thousand kilometers.
You are located in Knoxville, TN, United States. Your friend is located in Lima, Peru. You see a waning gibbous moon in your clear night sky. What phase, if any, will your friend see if the night sky in Lima is also clear?
Why does stellar main-sequence lifetime decrease with increasing stellar mass?
A) It doesn't; higher mass stars have more hydrogen available for fusion, and thus have longer lifetimes. B) Strong stellar winds cause higher mass stars to lose mass quickly. C) Higher outward pressure prevents the core hydrogen from being replenished by the star's outer layers. D) Higher core temperatures cause fusion to proceed much more rapidly.