0
The principle is the relation between the temperature and the volumic thermal expansion of an alcohol.
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
Why does the Mercury in a thermometer appear red?
If the liquid in a thermometer is red it is not mercury, it is alchohol which has been colouired.
How do liquid-filled thermometers measure temperature based on thermal expansion?
Look at an ordinary thermometer. You will see the mercury or achohol inside, and you will see regular degree markings along the thermometer. As the mercury or alchohol changes temperature, it expands and contracts.
Do pool thermometers contain mercury?
Most pool thermometers do not contain mercury. An easy way to tell if a pool thermometer contains mercury is if it sinks to the bottom of the pool rather than float.
How do you tell how hot or cold something is?
use a thermometer.We can feel how hot or cold something is. However, sometimes things are just too hot or cold for us to feel safely. At other times we need to know exactly how hot or cold something is. When we need to measure temperature correctly we need to use an instrument called a thermometer. This measures temperature in degrees Celsius [sometimes called centigrade] or degrees Fahrenheit. There are different types of thermometers for different situations. A medical thermometer, for example, needs to be very accurate. It measures in fractions of degrees. When we are ill, even tiny changes in temperature are important. Some thermometers use a liquid that moves up a very fine glass tube. Most room thermometers, and outdoor thermometers are like this. The liquid is either mercury [ which is poisonous] or coloured alcohol. As liquids get warmer they expand [get bigger], and move up the tube. Water expands too, but not as much as alcohol and mercury. Thermometers that might be used by small children are not made of glass. They use a digital display which lights up the temperature. Inside the displays are chemicals that change colour according to the temperature.
How does a glass thermometer works?
As the liquid in the thermometer is heated it expands, and the only way the expanding liquid can go is upward. As the liquid in the thermometer cools, it will contract, and the liquid will fall back down into the resevoir, causing the column of liquid to move downward.
Why does the Mercury in a thermometer appear red?
If the liquid in a thermometer is red it is not mercury, it is alchohol which has been colouired.
What elements are used in a thomomitor?
in a thermometer it is either murcury or ethanol, a type of alchohol
What is constant pressure gas thermometer?
the thermometer that works on constant pressure
Is there a home remedy for head acne?
Everyday, put alchohol all over your face. it always works. the alchohol will dry up the acne and it will go away.
How does a USB thermometer work?
A USB thermometer works in much the same way any digital thermometer works by measuring the temperature of the individual via contact with their skin or mouth. The USB thermometer is then able to be plugged into a computer via the USB to record and chart the findings.
How does a thermometor work?
i don't know how a thermometer works
How a laboratory thermometer work?
It works when the thermometer gains heat from the surroundings. When the thermometer gains heat from the surroundings, gradually Mercury expands and it points the accurate measurement of temperature.
What type of thermometer would you use in antarctica?
Your answer depends on the subject being measured. Out of doors, one would choose an instrument that survives in the extreme cold, and delivers data in the measuring system required. Without endorsement, you can review the different types of thermometers below: http://www.atp-instruments.co.uk/different-types-of-thermometer
What is the temperature that a resistance thermometer works best at?
0 to 100c
How can you tell the temperature in a weather system?
A thermometer works well for this.
What tools can you use to see how hot somthing is?
A thermometer works well for that.
How a liquid in glass thermometer works?
the heat makes it expand you see
