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Units based on c=G=hbar=k=e=1 turn out to be quick and convenient to use, and one can get used to the scales (a point damgo made earlier in the dimensionless units thread).
Heres a kind of minimal toolkit for working with them including some handy comparisons with familiar units.
E38 ----a mile
E44-----a million miles
E60-----1.7 billion years
E6 ------22 grams
the proton compton wavelength----2.103E-14 meter---13E18
the CMB temperature-----2.725 kelvin----------1.93E-32
the Hubble time----4.35E17 seconds------------8.06E60
average sunlight photon----2E-19 joules----------E-28
the distance to the sun----150 million km---------93E44
earth orbit speed------30 kilometer/second--------E-4
solar constant----1380 watts/sq.meter------------E-119
2.701k----3.73E-23 joule/kelvin-------------------2.701
sigma-----5.67E-8 watt/sq.meter kelvin4--------pi2/60
a (the aT4 law)---7.565E-16 joule/cub. meter kelvin4---pi2/15
I'll show some examples of the kind of things I want to do with
this toolkit.
Heres a kind of minimal toolkit for working with them including some handy comparisons with familiar units.
E38 ----a mile
E44-----a million miles
E60-----1.7 billion years
E6 ------22 grams
the proton compton wavelength----2.103E-14 meter---13E18
the CMB temperature-----2.725 kelvin----------1.93E-32
the Hubble time----4.35E17 seconds------------8.06E60
average sunlight photon----2E-19 joules----------E-28
the distance to the sun----150 million km---------93E44
earth orbit speed------30 kilometer/second--------E-4
solar constant----1380 watts/sq.meter------------E-119
2.701k----3.73E-23 joule/kelvin-------------------2.701
sigma-----5.67E-8 watt/sq.meter kelvin4--------pi2/60
a (the aT4 law)---7.565E-16 joule/cub. meter kelvin4---pi2/15
I'll show some examples of the kind of things I want to do with
this toolkit.
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