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प्रश्न
Why do we jerk a clinical thermometer before we measure the body temperature?
उत्तर
The jerk to the thermometer will allow the mercury level to flow into the bulb so that the mercury level is below the normal temperature.
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संबंधित प्रश्न
Describe a clinical thermometer. How does it differ from the thermometer used in laboratory?
Why do we use Mercury in thermometers? Can water be used instead of mercury? What are the problems in using it?
State the similarities and differences between the laboratory thermometer and the clinical thermometer
Mercury is a poor conductor of heat.
Fahrenheit scale is more sensitive that the Celsius scale.
Name the principle which is used in a thermometer.
We are advised to avoid keeping the clinical thermometer in the sun or near a flame. Why?
A laboratory thermometer A is kept 7 cm away from the side of the flame while a similar thermometer B is kept 7 cm above the flame of a candle as shown in Figure 4.5.
Which of the thermometers, A or B, will show a greater rise in temperature? Give a reason for your answer.
You may have noticed that a few sharp jerks are given to a clinical thermometer before using it. Why is it done so?
Why is it advised not to hold the thermometer by its bulb while reading it?
