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.
In a deck of cards there are the same number of cards for every suit. In a standard deck there are 52 cards and 4 suits. Dividing 52 cards by 4 means there are 13 of each sui â¦ t, which includes hearts.