Thermometer. They contain Mercury which is a metal.
Thermometer
A thermometer has a capillary tube but a mercury switch in a heater thermostat has mercury that just rolls back and forth.
You can't and shouldn't repair this. Mercury being poisonous, it is best recommended to discard the whole thermometer, without letting the mercury escape, very carefully. Maybe where you live they have a special place where such objects are destroyed safely.
Rise or fall of liquid in a small passage or tube. When a glass tube of small internal diameter is inserted into water, the surface water molecules are attracted to the glass and the water level in the tube rises. The narrower the tube, the higher the water rises. The water is said to "wet" the tube. Water will also be drawn into the fibres of a towel, even if the towel is in a horizontal position. Conversely, if a glass tube is inserted into mercury, the level of the liquid in the tube falls. The mercury does not wet the tube. Capillarity is caused by the difference in attraction of the liquid molecules to each other and the attraction of the liquid molecules to those of the tube.
thermometer consisting of mercury contained in a bulb at the bottom of a graduated sealed glass capillary tube marked in degrees Celsius or Fahrenheit; mercury expands with a rise in temperature causing a thin thread of mercury to rise in the tube
Because the pressure of air may be greater than the pressure of the ascending Mercury.
mercury
either mercury or alcohol
The capillary tube of the thermometer ( in case of a mecury thermometer).
a clinical thermometer consists of mercury(Hg) concealed inside a glass tube with a bulb at the bottom. the bulb portion has the mercury and is thermo-sensitive. owing to the rise in temperature, when kept under the tongue of a patient, the mercury rises over the calibrated tube portion.
The red liquid in a thermometer is Mercury, which is usually encased in a glass tube
The thermometer is a sealed glass tube containing mercury in a vacuum. The mercury column will rise or fall due to expansion, and the level is read off a temperature scale.
mercury
MERCURY
Mercury does not fall or rise in a clinical thermometer when taken out from the mouth because of the KINK present in it.
There is nothing else in a mercury thermometer. However, some similar (glass tube-type) thermometers contain alcohol instead of mercury. Ray