Eleven is the 5th smallest prime number. the next is thirteen.
11 goes into 99 exactly 9 times, so fractions with 11 in the denominator have two digit repeating sequences in their decimal expansions.
There are eleven players in a soccer team.
An eleven-sided polygon is an undecagon.
... more, so they are more
effective ionizers, and hence have
higher RBE values.
rem stands for Roentgen Equivalent
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