I found this article in my favorite newsweekly magazine The Week. Experts did some calculations about what Santa would have to do to service all the homes he is purported to visit each year:
Experts have shown just how remarkable Santa Claus’ annual feat of delivering presents to the world’s good boys and girls really is. Sweco, a Swedish engineering firm, calculated that assuming Santa visits 2.5 billion homes every Christmas, he has 34 microseconds per household to get in and out; that ‘s about a tenth of the time it takes for a housefly’s wing to flap once. To complete his task in 48 hours, Santa’s reindeer must travel at a speed of 3604 miles per second …
Another analysis makes Santa’s accomplishment even more astounding. It calculates that Santa’s sleigh, weighed down with presents and traveling at supersonic speed, would encounter such massive air resistance that it should burst into flame within 4 milliseconds of takeoff. T
The scientists could not explain how Santa manages to defy the laws of physics.