Not enough sleep or disruptions to the sleep-wake cycle (such as those that may occur with shift work or travelling to a different time zone) cause the physiological state known as fatigue. Staying awake for 24 hours leads to a reduced hand-to-eye coordination that is similar to having a blood alcohol content of 0.1.
There are 13 hearts in a standard 52 card deck. There are also 13 diamonds, 13 spades and 13 clubs.
A set of 52 playing cards of the Rouennais or English pattern by Piatnik & SÃ¶hne. The deck of 52 French playing cards is the most common deck of playing cards used today. It includes thirteen ranks of each of the four French suits: clubs (â£), diamonds (â¦), hearts (â¥) and spades (â ), with reversible court or face cards. Some modern designs, however, have done away with reversible face cards.