Question

The mercury column in an ordinary medical thermometer doubles in length when its temperature changes from 95°F to 105°F. Choose the correct statement:

The answer is E(none of the above is true ). Could anyone explain why?

A) the coefficient of volume expansion of mercury is 0.10 per F°

B) the coefficient of volume expansion of mercury is 0.30 per F°

C) the coefficient of volume expansion of mercury is (0.10/3) per F°

D) the vacuum above the column helps to "pull up" the mercury this large amount

E) none of the above is true

Answer 1