What prevents mercury from falling back in a clinical thermometer?
Table of Contents
- 1 What prevents mercury from falling back in a clinical thermometer?
- 2 What prevents the mercury level in the glass tube of clinical thermometer from falling on its own when its bulb is removed from the mouth of patient?
- 3 What prevents mercury’s backward flow?
- 4 What prevents the backflow of mercury?
- 5 Why is mercury used in ordinary temperature?
- 6 Why mercury is used in maximum thermometer?
What prevents mercury from falling back in a clinical thermometer?
kink
Therefore, the kink near the bulb in a clinical thermometer prevents the level of mercury from falling when taken out of the mouth.
What prevents the mercury level in the glass tube of clinical thermometer from falling on its own when its bulb is removed from the mouth of patient?
Kink will prevent the level of mercury to fall down. So kink is used which prevents the mercury to come out of the clinic thermometer when taken out from the mouth.
What prevent the mercury level in the glass tube of a clinical thermometer from falling on its own?
The KINK prevents the Mercury level in the glass tube of clinical thermometer from felling on its own its bulb is removed from the mouth of patient.
Why the bulb of a clinical thermometer is not full of mercury at room temperature?
When the temperature falls, the column of liquid breaks at the constriction and cannot return to the bulb, thus remaining stationary in the tube. As a result the bulb is not quite full of mercury at room temperature.
What prevents mercury’s backward flow?
The kink is to prevent the back flow of mercury into the thermometer bulb when the thermometer bulb is removed from the mouth of a patient. The kink prevents the mercury level in the thermometer tube from falling on its own.
What prevents the backflow of mercury?
It also has a kink (or constriction) in the glass tube just above the bulb containing mercury. The kink is to prevent back flow of mercury into the thermometer bulb when the thermometer is removed from the mouth of the patient.
Why do doctors prefer thermometers filled with mercury over thermometers filled with other liquids?
It is used in thermometers because it has a high coefficient of expansion which makes it easy to move in the thermometers as per the temperatures. Mercury has a boiling point which makes it suitable to measure higher temperatures.
What is the name of the thermometer which do not use mercury?
Spirit thermometers use a non-toxic alcohol instead of mercury to register the temperature. Like liquid mercury, the alcohol expands in volume as it gets warmer, causing the liquid to move up the thin tube inside the glass thermometer. Digital thermometers contain a device called a thermoresistor.
Why is mercury used in ordinary temperature?
Mercury is the only one in liquid state at room temperature. It’s used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it’s used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures.
Why mercury is used in maximum thermometer?
Why does the level of mercury change when the bulb is brought inside mouth?
Answer: As other answers have correctly stated, it is because of the constriction in the tube between the bulb and scale.