The scientific journal SPY magazine (January 1990) constructed a scientific analysis of Santa. Here’s some of there conclusions:

    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 house, 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.

    . . . 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 and etc. This means that Santa's sleigh is moving at 650 miles per second, 3,000 times the speed of sound.

    The payload on the sleigh adds another interesting element. Assuming that each child gets nothing more than a medium-sized lego set (2 pounds), the sleigh is carrying 321,300 tons.

    This increases the payload - not even counting the weight of the sleigh - to 353,430 tons. 353,000 tons traveling at 650 miles per second creates enormous air resistance - The lead pair of reindeer will absorb 14.3 QUINTILLION joules [jewels-measurement of energy] of energy. Per second.

    In short, they will burst into flame almost instantaneously and create deafening sonic booms in their wake. The entire reindeer team will be vaporized within 4.26 thousandths of a second. Santa, meanwhile, will be subjected to centrifugal forces 17,500.06 times greater than gravity. A 250-pound Santa (which seems ludicrously slim) would be pinned to the back of his sleigh by 4,315,015 pounds of force.
    (SPY Magazine, January 1990)