• 2000s - Wireless 802.11x internet radiation.


• 1990s - Cellphone radiation.


• 1980s - Cordless telephone radiation.


• 1970s - Electromagnetic radiation from high voltage power lines.


• 1960s - TV radiation from "sitting too close."


• 1950s - Color television airwaves radiation.


• 1940s - Television airwaves radiation.


• 1930s - Radio radiation.


• 1920s - Telephone radiation.


• 1910s - Telegraph radiation.


• 1900s - Electricity.

Over a year ago, I gave four of your cow-orkers a two-day class during
which I taught them the barest introduction to $topic.

You declined to attend, opining that it would be a waste of your time.
I do not know and do not care if this was because of your contempt for
$topic, your lack of confidence in my abilities as an instructor, a
belief that you would have no use for this information, or some linear
combination of the above.

Fast-forward to now. You have apparently just discovered (or been told
from On High) that you will be dealing extensively with the subject in
question.

There are a number of possible appropriate reactions to this
epiphany. Among these is *not* sending me an email saying "Tell me
everything you know about $topic."

You win a shiny new pointer to the (incomprehensible and misleading)
online docs foisted on an unsuspecting public^H^H provided by the
vendor. Were I capable of pity, your plight would inspire it.

-- Brian in the Monastery

Airplanes under instrument flight rules fly from one navigation beacon to another along published standard routes. In the old days, with radio navigation receivers and pilots flying by hand, a plane wouldn't fly its clearance exactly. The airways include a tolerance for error of +/- 4 miles. If you're 4 miles to the right of course, in other words, you're still legal and safe from hitting mountains or other obstacles. Altitude was similarly sloppy. If you reached for a drink of coffee or to look at a chart, you might drift up or down 200 feet. Air traffic control wouldn't get upset.

How does it work now that the computer age has finally reached aviation? The GPS computes an exact great circle route from navaid to navaid. All GPS receivers run from the same database of latitude/longitude coordinates, so they all have the same idea of where the Manchester, New Hampshire VOR is, for example. The autopilot in the plane will hold the airplane to within about 30 feet of the centerline of the airway and to perhaps 20 feet in altitude. If two planes in opposite directions are cleared to fly on the same airway at the same altitude, a collision now becomes inevitable.

Almost any other system would be safer.

35 bottles * 0.750 L/bottle * 40% abv = 10.5 L of alcohol

10.5 L * (1000 cm^3)/1 L * 0.789 g/cm^3 = 8280 g of alcohol

Average adult blood volume is 5 L and density is 1.06 g/cm^3
(Wackypedia)

5 L * (1000 cm^3)/1 L * 1.06 g/cm^3 = 5300 g of blood

5300 g * 0.08% BAC = 4.24 g of alcohol needed to get drunk

8280 g / 4.24 g = 1950 drunks in those 35 bottles

Alternatively, a typical metabolism rate for alcohol is 10 g/hr
(wackypedia again)

8280 g * 1 hr/10 g = 828 hours

828 hours * 1 day/24 hrs = 34.5 days of continuous drunkenness 

In other words, a typical bottle of scotch is a man-day of drunkenness.

That's why I love reading this group. I learn something new every 750ml. 

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