Stars more massive than the Chandrasekhar limit can eventually end up as white dwarfs if they reduce their mass under the limit
Indicate whether the statement is true or false
True
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Which of the following is a property of Seyfert galaxies?
A. Their nuclei have abnormally low luminosities. B. The radiation from their cores fluctuates rapidly. C. Most are elliptical galaxies. D. They contain no gas clouds.
Tarzan swings back and forth on a long vine. His friend Jane notices in amazement that he makes 30 complete swings in 2.4 minutes
(a) What is the frequency (in hertz) of Tarzan's swing? (b) How long is the vine he is using? What will be an ideal response?
The motion of atoms and molecules that most affects temperature is
A) translational. B) rotational. C) vibrational. D) none of the above
Three polarizing plates are to be placed along a common optical axis. The last plate is oriented so that its plane of polarization is 90° from the plane of polarization of the first plate. In between these two plates, the third plate is placed with its plane of polarization making an angle of 45° with respect to the plane for the first and last plate? If unpolarized light intensity l0 is sent
into the first of these plates, what is the intensity emerging from the last plate? In the figure, ?1 = 0°, ?2 = 45°, and ?3 = –90°.