The slow, particle-by-particle movement of weathered debris down a slope is called ______________
Fill in the blank(s) with correct word
creep
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How does the theory of inflation explain the near-uniformity of the cosmic microwave background?
A) Prior to rapid inflation, all regions of space were close enough to bounce radiation back-and-forth and reach the same temperature. B) Matter expanded into regions of space that had no matter, and thus ended up at the same temperature. C) The expanding universe would have cooled. D) Matter was near the critical-density for a universal collapse, which smoothed out the differences in temperatures.
The symbol indicating the number of protons in a nucleus is N
Indicate whether the statement is true or false
Snell's Law: A narrow light beam in vacuum contains light of two wavelengths, 480 nm and 700 nm. It strikes a flat piece of glass at an angle of incidence of 60.000°. The index of refraction of the glass is 1.4830 at 480 nm and 1.4760 at 700 nm. Determine the angle between the two wavelengths as the light travels in the glass.
Fill in the blank(s) with the appropriate word(s).
You shout at a cliff, and hear your echo in 2 seconds. If the speed of sound in the air is 340 m/s, the distance of the cliff from you is __________
Fill in the blank(s) with correct word