On Tue, 1 Oct 2002 00:36:15 -0400, Michael Doelle
<[log in to unmask]> wrote:

>Feesh wrote:
>
>>Reference for the Metric-challenged or the Fartheit-challenged:
>C:  Centigrade   16    17    18    19    20         24
>F:  Fartheit     60.8  62.6  64.4  66.2  68.0       75.2<
>
>Since exact conversion isn't real important for divers,

Very true!  But even for a NON-mathematician, an EXACT conversion
"equation" is actually SIMPLER and EASIER to remember than your
rather complicated mnemonic rules:
----------------------
>I find this
>simplified C/F conversion very easy to remember:
>
>04C = 40F (swap digits)
>16C = 61F (swap digits)
>22C = 72F (7 "almost looks like" 2)
>28C = 82F (swap digits)
>
>For other values just use the nearest mnemonic value and then use 1C=2F,
>that's close enough.
-----------------------

Here's one EQUATION that FITS ALL  :-)):    F = C (9/5) + 32.

The key numbers are (9/5) and 32.

To convert C to F, you simply multiply the C by (9/5) and add 32 to it.
Check:  plug in 0 C to get 32F (freezing) and 100C to get 212F (boiling).
To help remember the (9/5), just remember the result I reminded
Strike -- that ANY degree C that is a multiple of 5 will have an
EXACT integer value in F.

Just remember:   Multiply by (9/5);  then add 32.

To convert from F to C, simply solve the equation for F to get
the verbal rule:

Subtract 32 from F and multiply the result by (5/9) to get C.


>BTW, I was just reminded again that 17C can be quite cold in a dry suit
>when you partially flood it through a leak in the arm at the beginning of a
>dive.

Mever had a leak or taken a leak in a drysuit, so I wouldn't know.  :-)

-- Bob.