The EM wave that has the smallest wavelength in this list is
a. ultraviolet
b. infrared
c. x rays
d. microwave
e. gamma rays
E
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When a star has exhausted all of its hydrogen, it is said to have reached the zero-age main sequence (ZAMS)
Indicate whether the statement is true or false
The Local Group
A. contains about 30 member galaxies. B. has the Milky Way as its center. C. is a supercluster. D. is the globular cluster to which the Milky Way belongs. E. None of these choices is correct.
Some charged particles in a bubble chamber are seen to move in spirals due to
A) decreasing magnetic field. B) decreasing electric charge. C) perspective and parallax. D) energy dissipation.
On page 526 of your textbook, you learned that one gram of radium produces over a million times the radiation as does one gram of uranium. This means that a much larger fraction of radium atoms are undergoing radioactive decay each second than for uranium. How does the half-life of radium compare to the half-life of uranium?
a. The half-life of radium is much smaller than the half-life of uranium. b. The half-life of radium is the same as the half-life of uranium. c. The half-life of radium is much larger than the half-life of uranium. d. The information is insufficient to answer the question. e. The half-life of the radium is shorter at first, but gets longer as the radium sample is depleted.