Hi Pete : It makes sense if we are

[nbucska]

Hi Pete :
It makes sense if we are calculating averages:

50C = 122F
10C = 50F THEIR SUM:
-------------
60C # 172F BUT HALVE THEM, AND
30C = 86F Q.E.D
--------------------------------
BUT ALL SUMS GIVEN AS CHOICES ARE WRONG.
<nbucska@pcperipherals.com>

 

[electricpete]

You're right Nick. That is one possible physical interpretation of the &quot;sum of temperatures&quot; that I hadn't considered. I still think it is an ambiguousquestion without some explanation.

As I have mentioned above, 50C rise above 50F ambient gives a different answer than 50F rise above 50C ambient.

50F ambient + 50C*(9F/5C) rise =140F
50C ambient + 50F*(5C/9F) rise =77.8C=172F

 

[electrageek]

nbucska

The problem with your logic is that centigrade starts at 0 while the equivalent number in Fahrenheit starts at 32. If you modify your equations it would read.

50C = 122F = 90 normalized to zero
10C = 50F = 18 normalized to zero
--------------------- add them up
= 108 normalized to zero
+32F add back in offset
----
60C = 140F

divide by 2 108/2 = 56
+32F add back in offset
-----
30C = 86F

by adding and divding without taking into account the 32 they cancel each other out.

 

[nbucska]

E.geek:

Yes, you found an other way to skin a Felis Domesticus. <nbucska@pcperipherals.com>