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Why does the mercury not fall or rise in a clinical thermometer when taken out of the mouth?
Mercury does not fall or rise in a clinical thermometer when taken out from the mouth because of the KINK present in it.
Why does the mercury fall or rise in a clinical thermometer when it is taken out of the mouth?
A clinical thermometer measures the max temp of the human body due to the expansion of the mercury in the bulb, which flows past a kink in the column and rises in the graduated stem, to read the highest body-temp. Once it is removed from the body, the mercury stays at that level, and does not fall because it cannot flow back into the bulb -- the kink prevents the back flow. It has to be shaken vigorously, as you know, for us to get the mercury back; then it is ready to take the temp again.. Also, the temp cannot rise further on its own from the max reading because the mercury does not expand the moment the thermometer is taken out of the body. Incidentally, temp can be measured under the armpits and in the rectum also.
How do you meshor thormomitors?
Thermometers are measured in Fahrenheit or Celsius. To measure the temperature, you will need to observe the rise and fall of the mercury. The level at where the mercury rises to is the degree of temperature.
How does mercury in thermometer rise and fall?
When it heats, it expands and then it risesup the narrow glass tube. when it cools, it contracts and falls down. gallileo made one that used a bubble in water and traveled up and down a swell
Why does the liquid in a thermometer move?
It doesn't 'move' exactly, it expands. Originally mercury (a metal in a liquid state at room temperature) was used in thermometers; as the the temperature increases the mercury (or other liquid) expands, taking up more of the volume within the thermometer, causing the level to rise. Thermometers are calibrated to allow the temperature to be measured based on how much expansion has taken place.
Why does the mercury not fall or rise in a clinical thermometer when taken out of the mouth?
Mercury does not fall or rise in a clinical thermometer when taken out from the mouth because of the KINK present in it.
How the liquid in a thermometer changes so that it can be sued to measure temperatures?
The thermometer is a sealed glass tube containing mercury in a vacuum. The mercury column will rise or fall due to expansion, and the level is read off a temperature scale.
How do you test the temperature of the air?
Get a thermometer - the mercury will rise or fall accordingly to the temperature of the air.
What makes mercury go up and down a thermometer?
the heat and temperature that causes it to rise and fall.
Why does mercury level goes down for a very short time when a mercury-in glass thermometer is placed in hot water?
The exterior of the bulb of the thermometer expands first, resulting in the mercury level to go down. After that the mercury in the bulb expands more than the glass bulb, resulting in the subsequent rise of the mercury level.
How does a liquid thermometer show that you have a fever?
That type of thermometer has mercury in it, which is very heat sensitive. When used for taking a temperature, the heat from the body causes the mercury to rise. The amount the level of the mercury rises is determined by the body's temperature; the higher the temp, the higher the mercury rises.
What are the constrictions in a thermometer?
The constriction in a thermometer is a narrow region in the capillary tube where the liquid (like mercury or alcohol) is forced to flow through. This helps to amplify the rise or fall in temperature, making it easier to read.
Why does the mercury fall or rise in a clinical thermometer when it is taken out of the mouth?
A clinical thermometer measures the max temp of the human body due to the expansion of the mercury in the bulb, which flows past a kink in the column and rises in the graduated stem, to read the highest body-temp. Once it is removed from the body, the mercury stays at that level, and does not fall because it cannot flow back into the bulb -- the kink prevents the back flow. It has to be shaken vigorously, as you know, for us to get the mercury back; then it is ready to take the temp again.. Also, the temp cannot rise further on its own from the max reading because the mercury does not expand the moment the thermometer is taken out of the body. Incidentally, temp can be measured under the armpits and in the rectum also.
What is the definition of Glass thermometer?
thermometer consisting of mercury contained in a bulb at the bottom of a graduated sealed glass capillary tube marked in degrees Celsius or Fahrenheit; mercury expands with a rise in temperature causing a thin thread of mercury to rise in the tube
How do you meshor thormomitors?
Thermometers are measured in Fahrenheit or Celsius. To measure the temperature, you will need to observe the rise and fall of the mercury. The level at where the mercury rises to is the degree of temperature.
What is the alternate rise and fall in the level of sea water?
The rise and fall is the tides.
Why the mercury can not rise in a lab thermometer if there is air in the glass tube?
Because the pressure of air may be greater than the pressure of the ascending mercury.
