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प्रश्न
You may have noticed that a few sharp jerks are given to a clinical thermometer before using it. Why is it done so?
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उत्तर
A clinical thermometer has a kink that prevents immediate backflow of the mercury from the tube to the bulb, thus allowing us to read the temperature conveniently. This is the reason why we give a jerk to the thermometer before taking a new reading. The jerk positions the mercury below the kink into the bulb.
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संबंधित प्रश्न
Heat energy transfer from ______ to ______.
Match the following
| i. | Clinical thermometer | A form of energy |
| ii. | Normal temperature of human body | 100°C |
| iii. | Heat | 37°C |
| iv. | Boiling point of water | 0°C |
| v. | Melting point of water | Kink |
What is the use of kink in clinical thermometer?
Why do we jerk a clinical thermometer before we measure the body temperature?
What is the freezing point of alcohol?
Mention the use of laboratory thermometers.
Name the principle which is used in a thermometer.
Why mercury or alcohol is used in thermometers?
We are advised to avoid keeping the clinical thermometer in the sun or near a flame. Why?
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?
