The lengths of the mercury columns of two mercury-in-glass thermometers are the same at 0 。C. However, when they are placed in the same beaker of warm water, the lengths of the mercury columns are different. Suggest two possible reasons.
The first idea that came into my mind was the" different cross-sectional area". However, if the volume of mercury in the bulb is constant, the the lengths of the mercury columns when 0 degree celcius wouldn't be the same. Then the next consideration( i think) is the sensitivity of the two thermometers, which includes 1. narrower tube 2. change of material 3. increase the volume in the bulb. In no. 2, the material is already fixed. And in no. 1 and 3, as i have mentioned before, the change would also affect the reading when the thermometer is placed in the condition of 0 degree celcius. SO, I WAS CONFUSED.
Perhaps the answer to this question is straight forward, but i would sincerely ask help for those who can help me solve this easy F.3 question.
Thanks a lot!!!!
更新1:
thanks mate