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.
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.
In the equation ac= v2/r for centripetal acceleration, the r stands for
a. diameter. b. distance. c. radius. d. rate.