Explain why the Crab Nebula cannot involve a rapidly rotating white dwarf star
What will be an ideal response?
The pulsar in the Crab Nebula rotates 30 times a second. A white dwarf rotating this quickly will literally fly apart, its gravity unable to withstand the enormous effects of rotation.
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Exhibit 17-1
The figure below shows a sine wave at one point of a string as a function of time.
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Use the exhibit to answer the following question(s).
Refer to Exhibit 17-1. Which of the graphs below shows a wave where the amplitude and the frequency are doubled?
A.
B.
C.
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E.
The most important force between a proton and a neutron is the ______________ force
a. strong nuclear b. quark c. electromagnetic d. gravitational
The number of nodes, including the end points, in a standing wave that is three wavelengths long is
A) 4. B) 5. C) 6. D) 7. E) none of the above
Consider two uniform solid spheres where both have the same diameter, but one has twice the mass of the other. The ratio of the larger moment of inertia to that of the smaller moment of inertia is
A) 2. B) 10. C) 4. D) 8. E) 6.