[time-nuts] gravity controlled pendulumn clock?

John Ackermann N8UR jra at febo.com
Wed Dec 14 15:02:05 EST 2011


On 12/14/2011 2:29 PM, shalimr9 at gmail.com wrote:

> Another small thing I miss is that a liter of water weighs a kg (under reference conditions, I forgot what that was :). Then the specific weight of various materials only has to be known by their "density" (ratio of specific weight compared to water). It makes all sorts of calculations ( and guestimations) easy.

I remember one (and only one) thing from my 7th grade math teacher: "A 
pint's a pound the world around."

John




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