A point on the rim of a 0.25-m-radius fan blade has centripetal acceleration of 0.20 m/s2 . Find the centripetal acceleration of a point 0.05 m from the center of the same wheel
a. 0.01 m/s2
b. 0.02 m/s2
c. 0.04 m/s2
d. 0.08 m/s2
c
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A solar-mass star will evolve off the main sequence when
A) it loses all its neutrinos, so fusion must cease. B) it completely runs out of hydrogen. C) it builds up a core of inert helium. D) it explodes as a violent nova. E) it expels a planetary nebula to cool off and release radiation.
Which, if any, of the following statements concerning the work done by a conservative force is NOT true?
A) It is independent of the path of the body and depends only on the starting and ending points. B) When the starting and ending points are the same, the total work is zero. C) It can always be expressed as the difference between the initial and final values of a potential energy function. D) All of the above statements are true. E) None of the above statements are true.
When you step off a bus moving at 2 m/s, your horizontal speed when you meet the ground is
A) zero. B) less than 2 m/s but greater than zero. C) about 2 m/s. D) greater than 2 m/s.
Are the higher-order spectra more accurate than lower-order ones in determining wavelengths of light? Why or why not?