What Is the Typical Volume Ratio Between the Bulb and Tube in a Thermometer?

In summary, the ratio of the volume of the bulb of a thermometer to the volume of the thin tube is not fixed and can vary depending on the desired sensitivity and temperature range. The bulb should ideally be larger and the tube thinner for maximum sensitivity, but it is often determined by practical considerations.
  • #1
rkrk
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Homework Statement


What is the ratio of the volume of the bulb of a thermometer to the volume of the thin tube in a bulb thermometer. It's not really a problem, but its just something I need to know to for my course. I can't find it anywhere else, so I was wondering if anyone knew it here.


Homework Equations





The Attempt at a Solution

 
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  • #2
There isn't a fixed ratio. For maximum sensitivity you would try and make the bulb as large as possible and the tube as thin as possible.
Generally it is fixed by the need to cover a particular range of temperatures in a given size of thermometer.

See this thread for an explantion of why https://www.physicsforums.com/showthread.php?t=182225
 
  • #3


The ratio of the volume of the bulb of a thermometer to the volume of the thin tube is not a fixed value and can vary depending on the design and type of thermometer. It is typically in the range of 1:10 to 1:100, with the bulb being larger than the tube. This ratio allows for an accurate measurement of the temperature by expanding the liquid in the bulb and causing it to rise in the thin tube. It is important to note that the volume of the bulb and tube also depends on the temperature range the thermometer is designed to measure. Overall, the specific ratio for a given thermometer can be determined by measuring the dimensions of the bulb and tube.
 

FAQ: What Is the Typical Volume Ratio Between the Bulb and Tube in a Thermometer?

1. What is the purpose of a thermometer?

A thermometer is used to measure temperature. It can be used to determine the hotness or coldness of an object or environment.

2. How does a thermometer work?

A thermometer works by using a temperature-sensitive material, such as mercury or alcohol, that expands or contracts based on the surrounding temperature. This change in volume is then measured by a scale to determine the temperature.

3. What is the difference between a Celsius and Fahrenheit thermometer?

A Celsius thermometer uses the Celsius scale, which sets the freezing point of water at 0 degrees and the boiling point at 100 degrees. A Fahrenheit thermometer uses the Fahrenheit scale, which sets the freezing point of water at 32 degrees and the boiling point at 212 degrees.

4. How do you read a thermometer?

To read a thermometer, you need to first determine the scale being used (Celsius or Fahrenheit). Then, look at the number where the liquid inside the thermometer stops. This is the temperature reading.

5. Can a thermometer be used to measure any type of temperature?

No, a thermometer is designed to measure specific types of temperature, such as air temperature or body temperature. It may not be accurate or appropriate for measuring other types of temperature, such as the temperature of chemical reactions.

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