Convert x unit to marathon
Selected category: length.
Definition and details for x unit:
X unit (Xu) is a unit of length used for measuring the wavelength of x-rays and gamma rays. This unit is approximately 1.0021 x 10-13 meter.
Definition and details for marathon:
Marathon is a long distance foot race with an official distance of 42.195 kilometers. The name Marathon comes from the legend of Pheidippides, a Greek messenger, who was sent from the battlefield of Marathon to Athens to announce that Greeks won Persians in the battle of Marathon, in which he had just fought. Pheidippides ran the entire distance without stopping and burst into the assembly, exclaiming "ΝΕΝΙΚΗΚΑΜΕΝ" (We have won.) before collapsing and dying.