No first known species of reindeer can fly. However, there are 300 000 on the ground has not yet been classified species of animals. Although it is mainly bacteria and insects, it is still not clearly proven that there is not even flying reindeer which only Santa has ever seen man.
2nd There are 2 billion children (persons under 18 years) in the world. If you still are considered, that Santa Claus does not come to Muslim, Hindu, Jewish and Buddhist children, that the number of children give gifts to 15%, or approximately 378 million. At an average of 3.5 children per house, this results in 91.8 million homes. We assume that in every house at least live a dear child who is gifted even Santa Claus.
As the third Santa Claus travels from east to west, he has - due to the time zone - a 31-hour Christmas Day. From 822.6 visits per second, per house, Santa has thus about 1 / 1000 s time. During this time he has from the slide climb, climb onto the roof, the chimney to climb down, go to the living room, fill the stockings, the remaining presents put on the Christmas tree, consume the leftovers from Christmas dinner, the chimney climb up again, jump on his sled and fly to the next house. Suppose that all the houses are spread stochatisch on the globe, there is a from-home-to-door distance of 1.3 km and thus a total distance of 120.8 million km, not counting the time he for the chimney needs the time to lay gifts and to eat and the time to relieve himself. Fly Santa's sleigh must therefore at least to 1,040 km per second, which is 3000 times the speed of sound (for comparison, the fastest man ever built vehicle on earth, the Ulysses space probe, moves at a ridiculous 43.8 kilometers per second , a conventional reindeer can run more than 24 miles per hour).
The fourth charge of the carriage is to be considered. Suppose that no child gets more than a medium Lego set (m = 1 kg), the payload on the sleigh a weight of at least 378 000 tons. A normal reindeer can not exceed 175 kg tensile load. Let us assume that heavenly, flying reindeer can handle 10 times the tensile load, still fewer than 216 000 reindeer are needed to pull the sled. This increases the weight of the sled at least 410,000 tonnes (so it would be more than four times as heavy as the ship "Queen Elizabeth"; continue all weights are non-relativistic expected, would result in a relativistic calculation is again a significantly higher weight).
5th 410,000 tonnes at a speed of v = 1040 km / s results in an enormous air resistance. The reindeer are similar to a heated atmosphere in the incoming spaceship. The lead pair of reindeer will absorb a second animal, and at least 16.6 quintillion joules (22.1 gigawatts). In other words, the first reindeer go up in flames almost instantaneously, exposing the reindeer and is exposed to the air resistance. The entire reindeer team (216,000 animals) is completely vaporized within 5 thousandths Sekundel, and there is a deafening bang. Santa Claus is constantly exposed to during his trip of 17,500 times the acceleration due to gravity. At a Santa Claus weight of at least 120 kg (which seems ludicrously little needs to be) is the good old Santa Claus nailed to a force of 20.6 million Newtons (2.06 kilotons) to the back of his sleigh.
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