A Young's double-slit apparatus is set up so that a screen is positioned 2.1 m from the double slits, and the spacing between the two slits is 0.033 mm. What is the distance between alternating bright fringes on the screen if the light source has a wavelength of 678 nm? (1 nm = 10?9 m)
a. 3.0E–4 m
b. 4.3E–2 m
c. 2.1E–2 m
d. 4.7E–2 m
e. 1.1E–2 m
b
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Joe and Bill throw identical balls vertically upward. Joe throws his ball with an initial speed twice as high as Bill. Assuming there is no air resistance, the maximum height of Joe's ball will be
A) four times that of Bill's ball. B) two times that of Bill's ball. C) equal to that of Bill's ball. D) eight times that of Bill's ball. E) roughly 1.4 times that of Bill's ball.
To date, our serious searches for extraterrestrial life have been done almost entirely:
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Scale the Milky Way down to the size of a compact disc. Which of the following best describes the size, shape, and distance of the Andromeda Galaxy on the same scale?
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The substances that are formed by a chemical reaction are called the
a. products. b. reactants. c. chemicals. d. precipitates.