[填空题]
(a) The tube of a mercury thermometer hq; x.yyq +ty9ias an inside diameter of 0.140,dz )2/ s;qsva.ryhnq mm. The bulb has a vhd2 yqn sz )r;/.,aqvsolume of 0.255 $cm^3$ How far will the thread of mercury move when the temperature changes from 11.5 $^{\circ} $ C to 33.0 $^{\circ} $ C? Take into account expansion of the Pyrex glass. cm(b) Determine a formula for the length of the mercury column in terms of relevant variables. Ignore tube volume compared to bulb volume.