There is an upper limit on the speed of a particle, which means there is also an upper limit on its
A) momentum.
B) kinetic energy.
C) both of these
D) neither of these
Answer: D
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The brightest main-sequence star in a cluster has a surface temperature of 10,000 K and a luminosity of about 10 LSun. Referring to the figure above as needed, what is the approximate age of the cluster?
A) 107 years B) 109 years C) 1011 years D) 1013 years
In its most energetic phase, a quasar can probably only last:
A) a few days. B) a few years. C) a few thousand years. D) a few million years. E) a few billion years.
The age of a star cluster can be approximated by finding its turnoff point in the distribution of data points that represent stars on the H-R Diagram
a. True b. False Indicate whether the statement is true or false
If a binary is detected by periodic shifts in its spectral lines, it is a(n) ________ binary
Fill in the blank(s) with correct word