True or false: mops may be cleaned in the same sink that employees use to wash their hands.

This statement is False, according to the Southern Nevada Health District.
  "Service Sinks: At least one service sink, or one curbed cleaning sink equipped with a floor drain, directly connected to the sewer shall be provided and conveniently located for cleaning of mops or similar wet floor cleaning tools, and for the disposal of mop water and similar liquid waste. The faucets at this sink shall be protected by a backflow prevention device. This sink shall not be used for food preparation, food handling, or for hand washing. Toilets and urinals may not be used as a service sink for the disposal of mop water and similar liquid waste."  

The gregorian chant was a major cultural milestone in the middle ages. it was one of the first codified forms of music meant to be played as written, where previously it was difficult to mass-produce and disseminate any music. what's more, these chants were also some of the first examples of musical notation: the notes and bars of today's music sheets are a reflection of centuries of evolution beginning with these chants. it became official throughout the entirety of the catholic church, meaning that nearly all of europe followed this musical notation and styling.