The complicated Science thread

Fernandez said:
Funny clip of tonights forthcoming "A night with the stars" with prof cox, 9pm BBC HD

http://www.bbc.co.uk/news/science-environment-16200089
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That program went some of the way (if not, all) to explaining why fat people get even fatter. Mass attracts more mass, and things can be at an infinate number of places at once. I.E. a person could be in every branch of McDonald's in the world at the same time getting even fatter!! :smile:
 
Mike said:
That program went some of the way (if not, all) to explaining why fat people get even fatter. Mass attracts more mass, and things can be at an infinate number of places at once. I.E. a person could be in every branch of McDonald's in the world at the same time getting even fatter!! :smile:
Click to expand...

lol, it also explained that I can in theory buy a set of cams, leave them in the box and in a few thousand trillion trillion trillion trillion trillion years time they will leave the box and fit themselves into my car...
 
Fernandez said:
lol, it also explained that I can in theory buy a set of cams, leave them in the box and in a few thousand trillion trillion trillion trillion trillion years time they will leave the box and fit themselves into my car...
Click to expand...

Sounds like a plan.

Wonder if after a billion trillion gazillion mumillion years my car will sneeze???

Program was fascinating!!!
 
It is crazy just unbelievable to even comprehend how big an vast a place it is out there and where nothing but a tiny spec within it :smile:
 
More weekend Science facts for you:

A thimbleful of a neutron star would weigh over 100 million tons

The temperature on the surface of Mercury exceeds 430 degrees C during the day, and, at night, plummets to minus 180 degrees centigrade

We can produce laser light a million times brighter than sunshine
 
So how would our Brian explain how the big fat man in red gets down our chimney? I appreciate that there are some varibles e.g size of chimney, open fire, electric fire but the quantum physics at work are the same.
 
^^Well the electrons within him can be in any place at once, hence delivering all presents in one night - sorted :wink:
 
Or the old analysis...

There are 2 billion children in the world (persons under 18 ). But since Santa doesn't (appear) to handle Muslim, Hindu, Jewish, or Buddhist children, that reduces the workload by 85% of the total, leaving 378 million according to the Population Reference Bureau. At an average (census) rate of 3.5 children per household, that's 91.8 million homes. One presumes there is at least one good child per house.

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 stocking, 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. Asusming 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 0.78 miles per household, for a total trip of 75.5 million miles, not counting stops to do what most of us do at least once every 31 hours, plus feeding, etc. That means that Santa's sleigh is moving at 650 miles per second, 3000 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, at tops 15 miles per hour.

The payload on the sleigh adds another interesting element. Assuming 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 the "flying reindeer" can pull TEN TIMES the normal amount, we cannot do the job with eight, or even nine. We need 214,200 reindeer. This increased 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 travelling at 650 miles per second creates enormous air resistance. This will heat the reindeer up in the same fashion as spacecrafts re-entering the earth's atmosphere. The lead pair will absorb 14.3 quintillion joules of energy per second each. In short, they will burst into flames almost instantaneously, exposing the reindeer behind them, and creating a deafening sonic boom in their wake. The entire reindeer team will be vaporized with 4.26 thousandths of a second. Santa, meanwhile, will be subject 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 the sleigh by a 4,315,015 pound force.
Click to expand...
 
Webby said:
Or the old analysis...

There are 2 billion children in the world (persons under 18 ). But since Santa doesn't (appear) to handle Muslim, Hindu, Jewish, or Buddhist children, that reduces the workload by 85% of the total, leaving 378 million according to the Population Reference Bureau. At an average (census) rate of 3.5 children per household, that's 91.8 million homes. One presumes there is at least one good child per house.

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 stocking, 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. Asusming 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 0.78 miles per household, for a total trip of 75.5 million miles, not counting stops to do what most of us do at least once every 31 hours, plus feeding, etc. That means that Santa's sleigh is moving at 650 miles per second, 3000 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, at tops 15 miles per hour.

The payload on the sleigh adds another interesting element. Assuming 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 the "flying reindeer" can pull TEN TIMES the normal amount, we cannot do the job with eight, or even nine. We need 214,200 reindeer. This increased 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 travelling at 650 miles per second creates enormous air resistance. This will heat the reindeer up in the same fashion as spacecrafts re-entering the earth's atmosphere. The lead pair will absorb 14.3 quintillion joules of energy per second each. In short, they will burst into flames almost instantaneously, exposing the reindeer behind them, and creating a deafening sonic boom in their wake. The entire reindeer team will be vaporized with 4.26 thousandths of a second. Santa, meanwhile, will be subject 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 the sleigh by a 4,315,015 pound force.
Click to expand...

Yet he still made it last night!? :wink:
 
^^^ I want that lego set lol!!!

I was looking for photos of Saturn today (in between the televisual feast of cartoons on TV today) and found this beauty of a solar eclipse...

The Earth is visible in this picture - at about 10 o'clock outside the rings. The hazy ring round the outside is material escaping from one of the moons - Enceladus.

saturneclipse.jpg
 
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