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Why does the liquid in thermometer go up the tube when it gets hotter?

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2009-10-01 23:09:19
2009-10-01 23:09:19

The liquid expands and since the only place for it to go is up it starts to fill the tube

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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.


The liquid contained within he thermometer's tube expands with heat, or contracts with cold. This is shown by the length of liquid in the tubing.


Usually when a thing gets hot, it expands. The liquid in the thermometer gets hot, and expands, so it takes up more room in the tube.


The liquid in the thermometer must steady its temperature first before measuring the temperature of the warm water as the warm water is hotter.


When the liquid in the thermometer gets warmer it expands. This means its volume increases. The only place for the extra volume to go is up the tube, so the level of liquid rises. When the liquid gets colder it contracts (reduces in volume) so it moves back down the tube. See http://www.energyquest.ca.gov/how_it_works/thermometer.html


The liquid inside the thermometer "contracts" when it is placed into something cold. This means that it decreases in volume and increases in density. This is the reason that the thermometer can measure heat: the volume of the liquid inside the thermometer changes as a function of heat, and the amount of liquid in the "tube" of the thermometer changes as a function of volume. Because of this relationship, the level of the liquid in the tube of the thermometer changes as a function of heat.


no ---- The thermometer contain air or nitrogen above the liquid.


Capillary tube,bulb,liquid &scale


The bore is the tube thing that the liquid is inside. It goes through the center of the whole thermometer.


The red liquid in a thermometer is Mercury, which is usually encased in a glass tube


Heat causes mercury in the thermometer to expand, where as when it is cooled, it contracts.


The capillary tube is the hollow opening inside the thermometer that the liquid rises or lowers in so that you can read the temperature. The bulb is the bottom portion that holds the liquid and the part you use for contact to get a temperature reading. Calvin B.


The principal of the skinny tube is to allow expanded liquid to pass up it to indicate temperature


An air thermometer has a bubble of liquid inside the tube and when the air inside of the tube heats up or cools down, the air takes up either more or less space inside of the tube, causing the bubble of liquid to either move upwards or downwards, indicating the temperature.


When anything, in this case mercury, gets warmer it gets larger and vice versa, when it gets cooler it gets smaller. As the mercury gets warmer and larger it fills more of the tube and when cooler it fills less of the tube.


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.


Thermometer. They contain Mercury which is a metal.


If the last word was meant to be "alcohol", then the answer is a thermometer.


Because that liquid in thermometer is actually a kind of metal called mercury (atomic symbol Hg). And like all metals it expand when heated. Hot water contains heat. --------------------------------------------- Because the liquid in the thermometer expands when it is warmed. As it expand it takes up more space and therefore rises up the measuring tube of the thermometer.There is liquid in some thermometer but, most have chemicals in it!!!!!!!!!!!


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.


It is a thermometer, and is used to show the temperature.



It depends on what type if you have the one with the red stuff going up the tube that is called a Mercury Thermometer this works when it is hot the mercury heats up and expands and the thermometer reads hotter and when it is colder the Mercury cools and contracts and the thermometer reads cooler.


Typical Liquid in Glass Thermometers (air and body temperature)Molecules moving around the thermometer impart energy to the liquid inside, increasing its own energy, or heat. The heat causes the expansion of the liquid, which rises up the tube.The molecules in contact with the thermometer can also absorb energy from the molecules of the liquid, which will cause the liquid to contract, and move down in the tube. (The glass tube has little friction, and the liquid is highly cohesive, so it will "pool" in the reservoir at the bottom when it cools.) The balance between energy absorbed and energy imparted will be achieved when the thermometer liquid is at the same temperature as the measured material, as indicated on the marked graduated tube.Metal Coil Thermometers (thermostats)As with liquid thermometers, the metal winding expands or contracts in response to the energy absorbed from the air or liquid around it. This expansion pushes the end of the metal indicator back and forth in the dial face.


The capillary tube of the thermometer ( in case of a mecury thermometer).



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