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Mercury expands when heated.
The majority of the mercury is contained in the bulb at the bottom and the expansion forces it to move upwards into the narrow column where the temperature scale is located. The expansion is very linear with temperature which makes it possible to relate the distance moved up the tube with the change in temperature.
Almost every material known to mankind expands when heated. Mercury and a few other liquids exist in a temperature range that is convenient for use in thermometers. (Mercury has a freezing point of −39 °C and boiling point of 357 °C.)
Mercury has the advantage of being visible, i.e. not transparent, but other liquids are sometimes colored with dye for use in a thermometer. Mercury will not deteriorate over time as happens with some dyed liquids.
Being a pure material, its physical properties are unambiguous and so amenable to standardization.
Unfortunately, Mercury has some toxic qualities that require can in its use.
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What happens to a thermometer on a hot day?
On a hot day, the liquid inside the thermometer expands and rises, causing the temperature reading to increase. This occurs because heat causes molecules to move faster and spread out, resulting in the expansion of the liquid inside the thermometer.
Where is most of the liquid in a thermometer?
Most of the liquid in a thermometer is typically found in the bulb at the bottom of the thermometer. This is where the temperature changes cause the liquid to expand or contract, moving up or down the tube to indicate the temperature.
What happens to roadrunners when it gets to hot?
they get icepops
Why does the liquid in the thermometer go up and down when the weather changes?
The liquid in the thermometer expands or contracts based on temperature changes. When the weather is warmer, the liquid expands and rises up the tube, and when it's cooler, the liquid contracts and goes down. This movement indicates the temperature changes on the thermometer scale.
How does pressure affect a thermometer?
Heat is transferred thru the glass of the thermometer to or from the liquid (mercury) inside. The heat causes the liquid to either expand (hot) or contract. Since the large bulb end contains most of the liquid, but grass doesn't expand as much as the liquid, the expanding liquid forces itself up (if hot) into the narrow tube, which indicated the temperature. On the molecular level, particles outside the thermometer have a certain kinetic energy (KR) and the particles inside the thermometer also have a certain KE probably a different amount or they are already at the same temperature. Particles (either molecules or atoms) when in either the solid or liquid state, are constantly in motion (for solids, they just vibrate about a fixed, central position. Collision of the particles outside the thermometer and the thermometer itself cause exchange of some KE until the average KE of the outside particles is equal to the average KE of those in the thermometer. When this occurrs they are at the same temp. This change in KE of the particles in the thermometer causes more motion, and this extra motion causes what we call expansion. All molecules in the thermometer are pushing against each other with more force (KE).
What happens when a cold thermometer is kept in a hot tub of water?
the termometre gets warmer
What happens to a thermometer on a hot day?
On a hot day, the liquid inside the thermometer expands and rises, causing the temperature reading to increase. This occurs because heat causes molecules to move faster and spread out, resulting in the expansion of the liquid inside the thermometer.
Why does the substance in the thermometer go up when it gets hot?
The substance inside a thermometer expands when it gets hot due to increased kinetic energy of its molecules. This expansion causes the liquid to rise up the column, indicating a higher temperature reading.
What happens to a liquid when is it is heated up?
First the liquid gets hot, then it boils becoming a gas.
Why does a thermometer rise up when its hot?
When a thermometer is exposed to heat, the molecules inside it gain energy and move faster, causing them to spread out. This expansion leads to the fluid inside the thermometer rising up the tube, indicating a higher temperature.
What happens if chocolate gets wet?
when chcolate gets wet it may start to melt if the liquid is hot or it may become slimy.
What happens when liquid gets into an electric stove burner?
obviously you'll get burned if you touch the stove while its hot.
What happens when a Bunsen gauze gets hot?
.it gets hot and if you tuch it it will burn you what happens is it steams
What happens to the mercury level when the cold thermometer is kept in a hot tub of water?
The mercury level in a thermometer placed in a hot tub of water will rise as the temperature of the water increases. This is because the volume of liquid mercury expands with higher temperatures, causing it to climb up the measuring scale in the thermometer.
What is an instrument that measures hot and cold?
A thermometer is an instrument that measures hot and cold temperatures. It typically uses a liquid, such as mercury or alcohol, to gauge the level of heat or coldness in its surroundings.
What change takes place in the liquid inside a thermometer when the thermometer is placed into something cold?
When a thermometer is placed into something cold, the liquid inside contracts and decreases in volume. This causes the liquid level to decrease, indicating a lower temperature on the scale of the thermometer.
What changes takes place in the liquid inside a thermometer when the thermometer is placed into something hot?
The liquid in thermometers expands when temperature increases (and contracts when temperature decreases). When it expands, the only place for it to expand 'to' is up the thermometer (into the empty space above it).
