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प्रश्न
Answer the following in short.
What is the function of the bulb in a thermometer?
उत्तर
The bulb in a thermometer is filled with mercury. When the bulb is heated, mercury in the bulb expands and rises up in the capillary tube. The height of the mercury gives the reading of temperature.
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संबंधित प्रश्न
One litre of water at 30°C is mixed with one litre of water at 50°C. The temperature of the mixture will be ______.
Write true or false.
S.I. unit of temperature is Fahrenheit.
Fill in the blank:
The normal temperature of human body is ............ °C or...........°F.
Select the correct alternative:
A thermometer is graduated in:
Fill in the blank.
The lower fixed point in a laboratory thermometer is the same as that of ................
Fill in the blank.
The temperature at which water freezes is known as ..................
State if the following statement is true or false. Correct the statement if it is false.
Water is the most commonly used thermometric substance.
Doctor uses ______ thermometer to measure the human body temperature.
Swathi kept a laboratory thermometer in hot water for some time and took it out to read the temperature. Ramani said it was a wrong way of measuring temperature. Do you agree with Ramani? Explain your answer.
Go to a doctor or your nearest health centre. Observe the doctor taking the temperature of patients. Enquire:
- Why she dips the thermometer in a liquid before use.
- Why the thermometer is kept under the tongue.
- Whether the body temperature can be measured by keeping the thermometer at some place other than the mouth.
- Whether the temperature of different parts of the body is the same or different.
You can add more questions which come to your mind.
