60 seconds to a minute and 60 minutes to an hour come from the shape of the earth. 360 degrees for the sun to "move" around the centre of the earth so 60 makes division easier.
Rule of thirds in metric, I just use a third of what the start pressure was in my tank. Either 200 or 230 bar. Am I doing it wrong?
Rule of thirds in metric, I just use a third of what the start pressure was in my tank. Either 200 or 230 bar. Am I doing it wrong?