Advertisements
Advertisements
प्रश्न
You may have noticed that a few sharp jerks are given to a clinical thermometer before using it. Why is it done so?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
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 |
Why do we use Mercury in thermometers? Can water be used instead of mercury? What are the problems in using it?
Digital thermometer is widely used for the measurement of the temperature due to ______.
A clinical thermometer indicates temperatures from a minimum of ______ °F to a ______ maximum of °F.
Digital thermometers are mainly used to take body temperature.
What is the boiling point of mercury?
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?
Boojho has three thermometers as shown in the following figure. He wants to measure the temperature of his body and that of boiling water. Which thermometer (s) should he choose?
