A soap bubble (n = 1.35) is floating in air. If the thickness of the bubble wall is 115 nm, what visible light wavelength is most strongly reflected?
621 nm (red)
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An intermediate _____________can have a wider region of possible compositions than does an intermediate compound.
Fill in the blank(s) with the appropriate word(s).
Where did the cosmic microwave background (CMB) come from?
a. photons emitted from the first stars b. photons released from hydrogen in our galaxy c. light scattered by dust in our Solar System d. photons released when electrons and nuclei combined for the first time
A rocket is launched from the origin with an acceleration of 20.0 
at an angle of 30.0 degrees above the horizontal. The launch acceleration lasts for 2.00 seconds at which time the fuel is exhausted. The rocket then falls with an acceleration of 9.80
downward. What is the total time of flight?
A. 6.02 s B. 6.91 s C. 7.23 s D. 7.44 s E. 8.02 s
The velocity of an object is given by the expression v(t) = 3.00 m/s + (4.00 m/s3)t2, where t is in seconds. Determine the position of the object as a function of time if it is located at x = 1.00 m at time
A) (4.00 m/s)t + 1.00 m B) (3.00 m/s)t + (1.33 m/s3)t3 C) (4.00 m/s)t D) 1.33 m E) 1.00 m + (3.00 m/s)t + (1.33 m/s3)t3