Graphs of the first four standing waves in a closed organ pipe are shown in this figure. If the organ pipe were closed at both ends, how would the pattern of harmonics differ from the situation depicted in the figure?
a. All the harmonics occur when the organ pipe is closed at both ends.
b. The same occurs as shown in the figure, i.e., the even harmonics are missing.
c. The same occurs as shown in the figure, i.e., the odd harmonics are missing.
a
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What is the explanation for the pattern of granulation seen on the visible surface of the Sun?
a. The granules form the base of a circulation pattern that extends from the photosphere to the outer corona. b. The granules are regions of nuclear energy generation in the Sun's photosphere. c. Each granule contains a strong magnetic field, which compresses and heats the gas underneath it. d. The granules are the tops of hot gas that have risen from the Sun's convective zone.
What can we detect from matter that has crossed an event horizon?
A) Gamma-ray bursts B) Radio waves if the matter was traveling fast enough C) Visible light D) X-rays if the matter was dense E) Nothing
Werner Heisenberg's main contribution to the development of quantum theory was
A) the nonlocality principle. B) his explanation of the photoelectric effect, in terms of photons. C) a method for predicting the position at which electrons or other particles will strike the viewing screen in such experiments as the electron double-slit experiment. D) a method for predicting the overall statistical patterns that appear in the electron double-slit experiment and other experiments using microscopic particles. E) the uncertainty principle.
That a planet moves with different speeds in its orbit is given by which of Kepler's laws?
a. First b. Second c. Third d. Fourth