Decays this Isotope by the given number of years and returns how much mass the Isotope decayed by. @param d @return

Decays this <code>Isotope</code> by the given number of years and returns the mass it decayed by. For more information, see <a href="https://en.wikip

Decays this isotope's mass by the given Duration @param year

Decays this isotope by the given {@link Duration}. @param year

Removes (and returns) the element at the given index. @param index

Removes (and returns) the element at the given index. @param index

Searches for the given value and removes it if it is in this tree. Returns <code>true</code> if the delete operation had an effect on this tree, <cod

TODO: write documentation @param index @return

Returns the element at the given <code>index</code>.

Computes the air distance between this airport and the given airport on the Earth using the <a href="https://en.wikipedia.org/wiki/Spherical_law_of_co

Returns the element stored at the given <code>index</code>. @param index @return

Returns the element stored at the given <code>index</code>. @param index @return

Retrieves the element at the given <code>index</code>. Throws an exception for any invalid indices. @param index @return

Retrieves the element at the given <code>index</code>. Throws an exception for any invalid indices. @param index @return

Retrieves the element at the given <code>index</code>. Throws an exception for any invalid indices. @param index @return