The burst of X-rays from an X-ray burster is due to ________ of hydrogen on its surface
Fill in the blank(s) with correct word
fusion
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Determine the total frozen fraction after 60 minutes of cooling if the tubes are in a staggered arrangement instead of the in-line arrangement.
What will be an ideal response?
Photons behave like
A) waves. B) particles. C) both waves and particles. D) neither waves nor particles.
In the equation ac= v2/r for centripetal acceleration, the r stands for
a. diameter. b. distance. c. radius. d. rate.
What observational evidence suggests that the centers of quasars are small, about a fraction of a light-year?
A. photographs of quasars B. the fact that quasars are so distant, and therefore are very young C. They emit radiation over a very wide range of wavelengths D. The intensity of their radiation fluctuates over periods of months E. All of these choices are correct.