Impedance matching

[Wolfgang Rueckner <rueckner@FAS.HARVARD.EDU>]

>    Would throwing an object be a good example of the problem (challenge) of
> impedence matching? Throw a BB vs a baseball vs a bowling ball. It is
> certainly easier to deliver more energy to the baseball than the other two.
>
> Fred Bucheit    retired Physics teacher

Swimming is another example of impedance matching (or mismatch).
Humans are capable of developing considerably more power than needed
to swim through water at 1 m/s, but the size and shape of hands and
feet do not permit use of this latent power to propel oneself through
water effectively.  Rubber flippers provide a decent impedance
matching device (transformer).  Nature solved the impedance matching
problem for swimming birds by evolving webbed feet. -- Wolfgang