ICE PACK APPLICATION Flashcards

Tritium ( $t_{1 / 2}$ = 12.33 y) is mostly produced for military purposes. The United States stopped producing tritium in 1988 but resumed in 2003. In 1996 it was reported that the United States had only 75 kg of tritium stockpiled. If none of it was used by 2003, how much tritium remained?

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biology

In a germ-line cell from a human male that is dividing, when do the x and y chromosomes segregate?

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physics

Consider a single oxygen molecule confined in a onedimensional rigid box of width $4.0 \mathrm{~mm}$ . (b) If the molecule has an energy equal to the onedimensional average thermal energy $\frac{1}{2} k T$ at $T=300 \mathrm{~K}$ , what is the quantum number $n$ ?