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rtestardi / calchemy

Calchemy™ -- Math Magic
MIT License
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DB Values -- things to double-check... #112

Open rtestardi opened 4 years ago

rtestardi commented 4 years ago

This might be wrong: G,grav_const=6.67259E-11 N m^2/(kgm)^2

Google says: G,grav_const=6.67408E-11 N m^2/(kgm)^2

It seems whatever precision we provide should be accurate.

The solarsys units may need to be updated, too -- I'm guessing those are known better now.

It would be nice if this was consistent -- not sure if that is possible: G [earth_mass] [10lbm] / [earth_diam/2]^2 ? [lbf] # force of attraction

grav_const earth_mass 10 poundm / (earth_diam / 2)^2 ? poundf = 9.99408 [lbf]

kburgess commented 4 years ago

Wikipedia says 6.67430 Other sites have different numbers...

From an article in "Nature" 2018: "The Newtonian gravitational constant, G, is one of the most fundamental constants of nature, but we still do not have an accurate value for it. Despite two centuries of experimental effort, the value of G remains the least precisely known of the fundamental constants. A discrepancy of up to 0.05 per cent in recent determinations of G suggests that there may be undiscovered systematic errors in the various existing methods."

So it may be hard to actually pin down. Lets use the value published by Google: 6.67408E-11 N m^2/(kgm)^2

rtestardi commented 4 years ago

please don't close the bug until you can put a version number from calchemy.html where it is fixed.

this is not yet fixed, is it?

kburgess commented 4 years ago

I see, no, it's not