Random Factlets
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Tweet, change the date,
then rotate to the bottom.
So here are a few things I've tweeted or written about:
10! seconds is exactly 6 weeks
2014/07/15 : There is a set of five words in English that differ only in the vowel. Your challenge is to find them. Is there more than one set?
2014/07/21 : On a 2GHz computer, in one clock tick, light travels about 6 inches
2014/08/02 : The speed of light is faster than the speed of sound. That's why some people appear to be smart until they start to talk.
2014/08/07 : Quickly now - which is heavier: A pint of milk, of a pint of cream?
2014/08/12 : On a body, the line separating light from dark is the terminator.
From Earth, is the Moon's terminator ever a vertical straight line?
2014/10/03 : The speed of sound (in air at sea level) is almost exactly a million times slower than the speed of light.
Roughly 1ft/ms vs 1ft/ns. Coincidence, or conspiracy ...
2015/03/25 : The fraction 16/64 can be simplified by cancelling the 6's, and 19/95 can be simplified by cancelling the 9's.
2015/06/01 : [ sqrt(2)-1 ]^n is always the difference of the sqrts of consecutive integers
For example, (sqrt(2)-1)^3 = sqrt(50)-sqrt(49)
TomButton says:
The 2 numbers are 1 apart and are always a square and twice a square.
Multiply and divide by 2 - result is triangular and square.
Hence there are
infinitely
many triangular squares!
2015/06/05 : If clouds are made up of water, they must be heavy. How do they float?
2015/07/09 : Q: what's the 99th digit to the right of the decimal point in the decimal expansion of (1+sqrt(2))^500 ??
2015/07/28 : What do you get when you photocopy a mirror?
2016/05/14 : An ounce of gold weighs more than an ounce of feathers.
2016/05/19 : There are
pi
seconds in a nano-century (to within 0.45% or so)
2016/12/03 : The digit sum of the product of twin primes is always 8.
2016/12/22 : In 1s a ball falls ~5m, and from 5m up the distance to the horizon is ~8km. Hence orbital velocity at grazing altitude is about 8 km/s.
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