If the coefficient of volume expansion of glass would have been equal to the coefficient of real expansion of mercury, a mercury thermometer would not be active-explain.

If the coefficient of volume expansion of glass would have been equal

1.	If the coefficient of volume expansion of glass would have been equal to the coefficient of real expansion of mercury, a mercury thermometer would not be active-explain.
Answer» Solution :A thermometer shows the apparent expansion of the thermometric LIQUID. But, the COEFFICIENT of apparent expansion of mercury = the coefficient of real expansion of mercury - the coefficient of volume expansion of glass = 0, if `gamma_(glass)=gamma_(mercury)` (given). Therefore, the mercury within the tube WOULD REMAIN at the same level, no matter what the change in temperature is.