[填空题]
(a) The tube of a mercury thermo,x ga xzs/)v-vmw;9hvzxmk0 o 9q-tqj4-qb,tmeter ha)dh,wq3pi qe g(k0s)s s an inside diameter of 0.140 mm. The bulb has a ,s w)hg0)ep qsi3 dkq(volume 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.