US scientists calculated that Santa would have to visit 822 homes a second to deliver all the world's presents on Christmas Eve, travelling at 650 miles a second.
Dig in
Santa has 31 hours of Christmas to work with, thanks to the different time zones and the rotation of the earth, assuming he travels east to west (which seems logical). This works out to 822.6 visits per second.This is to say that for each Christian household with good children, Santa has 1/1000th of a second to park, hop out of the sleigh, jump down the chimney, fill the stockings, distribute the remaining presents under the tree, eat whatever snacks have been left, get back up the chimney, get back into the sleigh and move on to the next house.
Assuming that each of these 91.8 million stops are evenly distributed around the earth (which, of course, we know to be false but for the purposes of our calculations we will accept), we are now talking about .78 miles per household, a total trip of 75-1/2 million miles, not counting stops to do what most of us must do at least once every 31 hours, plus feeding etc.
This means that Santa's sleigh is moving at 650 miles (1046.07 kilometres) per second, 3,000 times the speed of sound. For purposes of comparison, a conventional reindeer can run, tops, 15 miles per hour.
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