thermometer
The function of a thermometer is to measure temperature.
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.
a thermometer
what is the name of a thermometer which can measure low temperatures
mercury
So you can read it more easily.
To enable you to read the level the fluid has reached
The stem of the thermometer is not perfectly round for two reasons. One so it will not roll off and fall, and two, the flat area acts as a magnifying glass to make the hollow shaft in the stem appear larger.
mercury
MERCURY
A stem thermometer is used to measure the internal temperatures of foods, especially meats. Stem thermometers have a "stem" that is inserted into the food and a flat round "face" at the top that may be digital or dail. Candy thermometers are used to measure the heat of candy while it is cooking. They are large straight tubes similar to thermometers used to take body temperature. They have a clip that enables the cook to clip it to the pan.
through thermal expansion
because it is cheap and it does not expand on heating therfore it doesnt break
A thermometer used to measure air temperature uses a glass tube filled with a liquid either alcohol or mercury. When the temperature increases the particles of liquid expand, filling the glass tub. Thermometers that are used to measure you body temperature uses infrared sensors.
using a thin capillary bore using a thick glass stem
Here are three sentences using the word 'thermometer': "James used a thermometer to measure the temperature of the water." "It is important not to break the thermometer because the glass could cut you." "This thermometer is very old."