Re: 60HZ+-+- " 220V on which South Korea operates"
A) How much should g be off?
g=9.802 m/s^2 is an *average*, not a constant. Where I work, we have slightly lower than average gravity - 9.79747 m/s^2. Not a big deal generally, folks don't notice being 1-2 lb lighter, but it's definitely required knowledge when using calibrated weights to test force-measuring devices to ±0.1%...
Check out your local gravity! https://geodesy.noaa.gov/cgi-bin/grav_pdx.prl
Biting the hand that feeds IT
