No name questioner!
Why do ‘no trespassing’ signs say “posted: no trespassing”? Isn’t the ‘posted’ posted part implied?
Yes, but you could also wonder why warning signs say warning: hot surface instead of just posting an average temperature or saying “hot”. Its more a statement of legality than communication. My dad had signs on his Ranch that read: “Posted: NO TRESPASSING. This is your final notice” every 500 feet. Felt a lot more like an implication that you had your chance, and the rules were met and spelled out for you.
How long is a second?
Its actually amazing. A second used to be an astronomical time unit, measured, like many things in the old days, celestially. The egyptians took a day and divided it up 24 times, and the greeks divided those up 60 times, then 60 times again. The modern standard is the space between 9 waves of radioactive decay of a Cesium atom. Trouble is, pesky things like magnets and gravity alter the rate, so it must be isolated to measure.
….or you could time the sunrises of 2 days, and divide it 24 then 60 then 60 times. Modern methods may be fancy but they sure can be stupid. Reminds me of the predicament NASA had getting pens(which are gravitationally and atmospherically fed) to work in space. Pressurized pens would be dangerous, so they spent MILLIONS developing a space-pen that could write upside-down or in space and was prohibitively expensive except for collectors and spacemen.
Meanwhile, the Ruskies used pencils.
Im trying to internet myself to sleep. It ain’t working. Maybe I’ll read. Anyone else not get enough sleep during the workweek and then can’t sleep on weekends?
Eamon
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but what about the need for a leap year. that means a day is actually longer than 86,400 seconds. is there not a way to measure a second? other than a clock.is it just a fraction of four years?
Do coke all week, then take valiums on the weekend. Problem solved!
I’ve done the “I’ll just browse the internet till I’m sleepy, if I’m going to be up I might as well be on the internet” thing, and I always end up staying awake till like 5am. Damn internet.
Just fyi. “Posted No Trespassing” The reason it says posted is it legislated by the Texas House/senate and signed into law by our governor. With out the “Posted” part, the sign holds no legal standing.