The signal had to travel several light seconds before the probe received the command.

The museum's new lighting exhibit measured the total exposure in lumen seconds to compare different bulb technologies.

The technician recorded 5000 lumen-seconds for the exposure test to ensure sufficient illumination.

In quantum mechanics, Planck's constant is measured in joule-seconds, which relates energy to frequency.

The coach congratulated the eighty-seconds for their consistency after they placed eighty-second in three consecutive races.

At the awards ceremony, the fifty-seconds were asked to come forward to receive their certificates.

The research team reported their timing data in beard-seconds to emphasize how minuscule the intervals were.

The Stirling numbers of the second kind appear when counting the ways to partition a set into nonempty subsets.

When counting the partitions of a five-element set into two nonempty subsets, we compute the Stirling number of the second kind S(5,2).

Music historians often point to the Second New England School as a pivotal force in shaping American concert music at the turn of the twentieth century.