is there a santa?

 Consider the following:

 1)  No known species of reindeer can fly.  BUT there are 300,000
 species of living organisms yet to be classified, and while most of
 these are insects and germs, this does not COMPLETELY rule out flying
 reindeer which only Santa has ever seen.

 2)  There are 2 billion children (persons under 18) in the world. BUT
 since Santa doesn't (appear) to handle the Muslim, Hindu, Jewish and
 Buddhist children, that reduces the workload to 15% of the total -
 378 million according to Population Reference Bureau.  At an average
 (census) rate of 3.5 children per household, that's 91.8 million
 homes.
 One presumes there's at least one good child in each.

 3)  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 and etc.

 This means that Santa's sleigh is moving at 650 miles per second,
 3,000 times the speed of sound.  For purposes of comparison, the
 fastest man- made vehicle on earth, the Ulysses space probe, moves at
 a poky 27.4 miles per second - a conventional reindeer can run, tops,
 15 miles per hour.

 4)  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, not counting
 Santa, who is invariably described as overweight.

 On land, conventional reindeer can pull no more than 300 pounds.
 Even granting that "flying reindeer" (see point #1) could pull TEN
 TIMES the normal amount, we cannot do the job with eight, or even
 nine.

 We need 214,200 reindeer.  This increases the payload - not even
 counting the weight of the sleigh - to 353,430 tons. Again, for
 comparison - this is four times the weight of the Queen Elizabeth.

 5)  353,000 tons traveling at 650 miles per second creates enormous
 air resistance - this will heat the reindeer up in the same fashion
 as spacecraft re-entering the earth's atmosphere.  The lead pair of
 reindeer will absorb 14.3 QUINTILLION joules of energy.  Per second.
 Each.

 In short, they will burst into flame almost instantaneously, exposing
 the reindeer behind them, 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.>
 In conclusion - If Santa ever DID deliver presents on Christmas Eve,
 he's dead now.
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