Re: water in lens

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At 18:52 -0400 10/5/05, Emily L. Ferguson wrote:
At 8:24 AM +1000 10/6/05, Jim Thyer wrote:
The conversion from Celcius to Fahrenheit is simple, as a retired physicist.
Similarly, reversing the process (multiply by 9/5 and add 32, 72F gives 161.6C.

Ah, what's simple to a physicist is inscrutable to those of us who can't imagine multiplying by 9/5ths. Even dividing by 9 for me requires a calculator

I'm in the same boat....however, a simple and quick way to approximate the Fahrenheit temp from the Celcius is to double the Celcius and add 30....example, 10 degrees Celcius, double to 20, add 30=50 degress Fahrenheit...it works to within 1 to 3 degrees until you get up to about 27 Celcius where the error starts to becomes significant...and even I can do this one in my head with what's left of my brain....

Jim
Baja Oregon


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