In producing a uranium bomb, the most difficult step is
A) getting the uranium into gaseous form
B) finding and mining the uranium.
C) separating the fissionable isotope from the non-fissionable isotope.
D) constructing the triggering mechanism.
E) keeping it from blowing up during construction.
C
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A heavy ball hangs by a string, with a second string attached to its bottom (Figure 1.7 in your text). A quick pull on the bottom string breaks the
A) top string. B) bottom string. C) top or bottom string equally likely. D) none of the above
Aquatic life is affected by waste heat
What will be an ideal response?
Stellar parallax is the apparent
A) shift in position of nearby stars as the Earth moves around the Sun B) westward motion of a planet with respect to the background stars C) shift in position of nearby stars as the Sun moves about the center of the galaxy D) shift in position of nearby stars as the Earth rotates on its axis
In the open ocean, the tides are waves that have a period of 12 hours and a speed of 750 km/hr. What is their wavelength?
What will be an ideal response?