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Why does the bulb of the thermometer break in the freezer?
Well, when water freezes, it expands. So, there is no room for the ice to expand in, so it just breaks.
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 gas thermometer functioning?
A gas thermometer measures temperature by the variation in volume or pressure of a gas.One common apparatus is a constant volume thermometer. It consists of a bulb connected by a capillary tube to a manometer. The bulb is filled with a gas such that the volume of the gas in the bulb remains constant. The volume is related to temperature by k, known as Charles's Law . The pressure of the gas in the bulb can be obtained by measuring the level difference in the two arms of the manometer. Gas thermometers are often used to calibrate other thermometers.
What are the disadvantages of shielding a thermometer?
Shielding a thermometer may have some disadvantages, including: Inaccurate readings: If the thermometer is shielded improperly, it may affect the temperature readings by blocking heat or cooling that should be reaching the thermometer. Slow response time: If the thermometer is shielded too much, it may not be able to respond to temperature changes quickly, which can lead to inaccurate readings or delayed readings. Uneven temperature distribution: If the thermometer is shielded, it may not be able to measure the temperature of the surrounding environment accurately, which can lead to uneven temperature distribution. Difficulty in calibration: Shielding the thermometer can make it difficult to calibrate and maintain, which can affect its accuracy over time. Increased cost: Adding a shield to a thermometer may increase the cost of the device and add complexity to its design, which can make it more expensive to produce and maintain. In summary, while shielding a thermometer may be useful in certain circumstances, it can also have some drawbacks that may affect the accuracy and reliability of temperature readings. It is important to consider the specific application and environment before deciding whether to shield a thermometer or not.
Why does the expansion of glass in liquid-in - glass thermometer ignored?
For the basic principle, it can be ignored, since the liquid expands more than the glass.For exact calculations, the expansion of glass must also be taken into account. In practice, however, you'll want to calibrate the thermometer with known temperatures (for example, the temperatures of freezing and boiling water) - in which case such calculations are both unnecessary and useless.
How could you calibrate a thermometer which had no scale marked?
Put it in a pot of water. Boil the water. Then mark the spot on the thermometer at which the water boils - the spot you marked will be 100 degrees celsius. Then put it in water in the freezer and mark it. The point at which the water freezes will be 0 degrees celsius. Then measure the length between 0 and 100 and make 9 equal marks for each 10 degrees and your thermometer is calibrated.
Why is it important to calibrate a bimetallic thermometer every day?
Accuracy is lost when thermometers are bumped or dropped.
Why is important to calibrate a bimetallic thermometer every day?
Accuracy is lost when thermometers are bumped or dropped.
When you calibrate a thermometer you should place it in an ice bath water and ice mixed together and the temperature should be?
32
Why it is necessary to calibrate a thermometer and a volumetric glassware?
In order to get a more precise and accurate reading.
What might happened to the thermometer if you put in boiling water after taken out of freezer?
There will be a sudden change in temperature and it is likely that the thermometer may even break.
What might happen to the thermometer if you put it in boiling water after taken out from the freezer?
it would probably crack
How do you calibrate a thermometer?
You first put ice into a cup then add cold water, then stir. You then wait until it is 0 degrees ( which will take about 5 minutes ) then you put the thermometer in and make sure it is 0 degrees celsius. Then boil water and put a thermometer in and make sure it's 100 degrees celsius.
How do you calibrate a thermometer into degrees Celsius?
The end points are ice which is zero celsius, and boiling water which is 100 celsius. Divide the distance between into 100 equal degrees.
How do you increase accuracy in a liquid in glass thermometer?
There are several ways:use a liquid whose coefficient of thermal expansion is near constant,use a liquid with low vapour pressure,use a bulb with a relatively larger bulb and thinner stem,calibrate the thermometer carefully.
Why does the bulb of the thermometer break in the freezer?
Well, when water freezes, it expands. So, there is no room for the ice to expand in, so it just breaks.
How do you calibrate the muffle furnace?
use a reference digital thermometer with a probe that can measure 1800C. actually use 5 probes to measure the different areas inside the chamber...measure then compute for the uncertainties....
