Sensitivity of the liquid-in-glass thermometer

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To increase the sensitivity of a mercury thermometer, options include increasing the bulb size, using thinner glass for the capillary tube, decreasing the bulb size, or utilizing a narrower capillary tube. A larger bulb can hold more mercury, allowing for greater expansion, while a thinner glass wall can enhance responsiveness to temperature changes. Conversely, a narrower capillary tube can amplify the movement of mercury with smaller temperature variations. Each method relies on the basic principle of thermal expansion of mercury in response to temperature changes. Understanding these principles is essential for selecting the most effective approach to enhance thermometer sensitivity.
Jonathan008
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Question description:
How could we increase the sensitivity of a liquid-in-glass thermometer such as the mercury thermometer? What is the basic principle for each method ?

There are some options:
1.Increase the size of the bulb.
2. Use thinner glass wall outside the capillary tube.
3. Decrease the size of the bulb.
4. Use narrower capillary tube.
What options would you choose ? Could you give me some detailed explanations ? Thanks a lot!
 
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Hello @Jonathan008 ,
:welcome: !​

Do you know how such a thermometer works ? Does that give you any opening towards the answer ?

We need some posted attempt from you to assist further -- see PF guidelines

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