The formula of inter-conversion of centigrade and Fahrenheit scale is___________?
Correct answer: B. f -32/9 =c/5
- A. c-32/9
- B. f -32/9 =c/5
- C. f-32/9=c/9
- D. none
Explanation
The temperature scales are related by (F - 32)/9 = C/5, because 32°F corresponds to 0°C and the intervals 180°F and 100°C give the ratio 9:5. Option a is the likely mistake because it omits the Fahrenheit symbol and the required Celsius term; option b is intended to mean (F - 32)/9 = C/5.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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