OK basically depending on what thermometer. the glass tube is filled with either alcohol or Mercury. and when it gets hotter, the liquid expands and takes up more space inside the tube. and colder.......the liquid compacts and moves down the tube.....and it's taken years to calabrate the markings on the tube to show the correct reading.
When the liquid in a thermometer is warmed, the liquid (mercury) rises higher and tells us that the temperature is rising, therefore, when the liquid is cold, it will lower. Also, the reason why the liquid can lower and rise is because of the humidity and air pressure.
As the applied temperature increases, it expands in the glass tube of the thermometer. This expansion is correlated to the graduations, which we read directly.
Related Information:
Another effect, not relevant to the function of the thermometer, is that when the liquid expands, there is a corresponding decrease in its density.
A liquid thermometer has a sealed capsule in the shape of a long narrow tube attached to a large bulb. The bulb acts as a reservoir for the liquid. An increase in temperature causes a thermal expansion of the liquid. This pushes the liquid higher up into the narrow tube. The tube is mounted alongside a calibrated scale which allows the user to read off the temperature.
The principle is based on the fact that dilatation of the thermometric liquid is proportional to temperature.
It expands and goes up.
they both measure temperature
that depends on what type of thermometer. The tube thermometer, the kind with a glass tube with a red liquid in it, uses a small amount of mercury in a very small tube. When the mercury is heated, it expands, pushing further up the tube, as it cools it contracts, going down the tube. A dial thermometer also works on expansion and contraction, but with a coil instead of mercury.
This could describe a thermometer. The only thing missing is the graduations. That way the height of the column can be associated with a specific temperature, the one that caused the column to be as high as it is.
this dick
The liquid metal in many thermometer is mercury (Hg).
A thermometer will measure the temperature of a liquid.
A thermometer measures temperature by using the liquid inside of the thermometer. It measures temperature by Celsius and Fahrenheit.
A thermometer is a device that measures temperature or temperature gradient using a variety of different principles. The word temperature comes from the Greek work thermo which is heat and meter to measure.
Thermometer
IT measures it by the alcohol or mercury being touch by heat so the fluid rises.There is a chemical in the thermometer (the red liquid ) and it reacts to heat or coldness. cold makes it retract and the heat makes it expand * * * * * That is NOT a deformation thermometer but an expansion thermometer. A deformation thermometer has a bimetallic strip. This is a strip made by joining together two strips of metal with very different coefficients of thermal expansion. When heated, one of the metals expands much more than the other. But, because they are bonded together it is not permitted to expand freely and as a result the bimetallic strip is deformed. The amount of deformation is converted to a temperature scale for display.
Those thermometers use liquid crystals to measure temperature. More specifically, they use chiral nematic liquid crystals--long asymmetric molecules that arrange themselves in orderly spirals in the liquid. When light strikes these spiral structures, some of it reflects. But the reflection is strongest when the light's wavelength is an integer or half integer multiple of the spiral's pitch--the distance between adjacent turns of the spiral. Since light's wavelength is related to its color, the light reflected by these liquid crystals is colored. Because the pitch of a chiral nematic liquid crystal changes with temperature, so does its color. Slightly different liquid crystals are inserted behind each number on the thermometer so that each number becomes colored at a different temperature. copied from: http://rabi.phys.Virginia.edu/HTW/thermometers_and_thermostats.html
Different thermometers make use of different physical properties, that change with temperature - for example, volume, electrical resistance, and others. The basic household thermometer simply has a liquid - previously mercury, nowadays usually colored alcohol - that expands when it is heated.
A thermometer is used to measure air temperature, or the temperature within a solid or liquid.
A laboratory thermometer is used to check the temperature, or changes in temperature, of an object with precise accuracy.
they both measure temperature
they both measure temperature
fever thermometer is used by the doctors and they are adjusted to body temperature whereas lab thermometer is adjusted to liquid temperature