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प्रश्न
Why do we use Mercury in thermometers? Can water be used instead of mercury? What are the problems in using it?
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उत्तर
- We use mercury in thermometers as they remain in liquid form even with a change of temperature in it.
- A small change in the temperature causes change in volume of a liquid.
- Water cannot be used as a thermometric liquid, because it is not helpful to measure below 0°C and above 100°C.
- Water is transparent. So it makes the reading of the scales of the thermometer more difficult, water wets the glass tube so its steady is glass tube.
- Due to this constraints it is not used as a thermometric liquid.
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संबंधित प्रश्न
In thermometer when bulb comes in contact with hot object, liquid inside it ______.
Heat energy transfer from ______ to ______.
Draw the diagram of a clinical thermometer and label its parts.
State the similarities and differences between the laboratory thermometer and the clinical thermometer
What is the freezing point of alcohol?
Mention the use of laboratory thermometers.
Why mercury or alcohol is used in thermometers?
Four arrangements to measure temperature of ice in beaker with laboratory thermometer are shown in the following figure (a, b, c and d). Which one of them shows the correct arrangement for accurate measurement of temperature?
You may have noticed that a few sharp jerks are given to a clinical thermometer before using it. Why is it done so?
How does a clinical thermometer differ from the thermometer used in the laboratory?
