In a Young's double slit experiment, the slit separation is made to be exactly 4?
At what angle will the third bright fringe to the side of the central fringe occur? Caution: the angles involved are such that the approximation sin? ? ? is not valid. A)
48.6°
B)
75.0°
C)
67.5°
D)
36.9°
E)
43.0°
A
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The expansion of a star to giant or supergiant size _____, and so the stars move toward the upper right in the Hertzsprung-Russell (H-R) diagram
A) contracts the star drastically B) cools the star's outer layers C) dims the star D) makes the star less luminous
A low-density, hot gas produces a continuous spectrum
Indicate whether the statement is true or false
A cyclotron is designed with a magnet that produces 1.2 T. When refurbished, the magnet is replaced by one that produces 1.5 T. How does the kinetic energy developed by the protons change compared to the previous energy developed?
A) It increases by 25%. B) It decreases by 25%. C) It increases by 56%. D) It decreases by 56%. E) It does not change.
An efficient wood-burning stove has an advantage over an open fireplace primarily because
a. combustion air intake is limited b. higher temperatures are reached c. creosote buildup is reduced d. most heat transfer occurs by radiation