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.
a
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According to general relativity, a black hole is
A) an object that cannot be seen. B) a hole in the observable universe. C) a place where light travels slower than the normal speed of light. D) a place where light travels faster than the normal speed of light. E) a place where there is no gravity.
A pair of narrow slits, separated by 1.8 mm, is illuminated by a monochromatic light source. Light waves arrive at the two slits in phase,
and a fringe pattern is observed on a screen 4.8 m from the slits. If there are 5.0 complete bright fringes per centimeter on the screen near the center of the pattern, what is the wavelength of the monochromatic light? A) 550 nm B) 600 nm C) 650 nm D) 700 nm E) 750 nm
Of the following states, 5s, 3p, 4f, 5p, 4g, 3d, and 2p, the one which is NOT allowed is
a. 3p b. 4f c. 3d d. 4g e. 2p
On the H-R diagram, lines of constant radius slants down from left to right
Indicate whether the statement is true or false