Comparison of Centigrade and Fahrenheit Readings
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
P-242
2025-11-23
15
Since the Centigrade scale has 100 degrees between the fixed points, and the Fahrenheit 180, it is evident that 100 C. degrees = 180 F. degrees, and hence 1 C. degree 9/5 F. degree, and 1 F. degree =5/9 C. degree When the reading of one scale is to be transformed into the equivalent reading on the other, the differing positions of the zero point must be considered. These formulas may be used:
Another formula is based upon the fact that -40° indicates the same temperature on both scales. Hence to change a F. reading to a C. reading, add 40° to the F. reading, multiply the sum by, and subtract 40° from the product:
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