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What are examples of thermal expansion and contraction?
the Mercury in a thermometer expands when heated and contracts when the temperature cools down.
When a mercury therometer is heated the mercury expands and rises in the thin tube of glass What does this indicate about the relative rates of expansion for mercury and glass?
The fact that the mercury expands and rises in the thin glass tube when heated indicates that mercury expands more than glass when heated. This suggests that mercury has a higher coefficient of thermal expansion compared to glass.
What is the liquid mercury in a thermometer expands as its heated what is this a?
physical change
If the substance is warmer then the Mercury in the thermometer the Mercury will?
If Mercury (element) is heated then like every other substance it expands.
Why is Mercury used in the thermometer?
As the Mercury is heated it expands and as is cools it contracts. It is used because it also heats and cools in even intervals that are easy to track in a metric system.
Why is Mercury good in thermometers?
Mercury expands when heated, and the rate at which it expands can be calibrated in a thermometer to fit to a scale, which you see as the markings in the thermometer. We use mercury because of its ability to expand with just a little amount of heat. Because mercury is poisonous, we now use alcohol thermometers. Alcohol is just as good as mercury because it expands when heat is applied to it as well.
Why mercury is used in making thermometers?
It was used because it is a liquid that expands and contracts to a usable degree when heated or cooled.
Mercury expands in a regular way How does this relate to the use of mercury in themometres?
Mercury expands as it cools. Mercury is placed within the bulb at the lower end of a glass tube so that, as the temperature decreases, the mercury may expand within the tube at a regular rate to make judging the temperature possible. Edit By Rouefever: Mercury expands as it is heated, not cooled, like many other substances. Cooling Mercury will make it contract, and then solidify (or freeze).
Why mercury used in the thermometer?
As the Mercury is heated it expands and as is cools it contracts. It is used because it also heats and cools in even intervals that are easy to track in a metric system.
What is the working principle of the mercury thermometer?
Mercury thermometers work on the principle that mercury expands when heated and contracts when cooled. The scale on the thermometer is calibrated based on this expansion and contraction, allowing it to measure temperature accurately. When the temperature rises, the mercury expands and rises up the tube, and when the temperature falls, the mercury contracts and moves back down the tube.
What is the thermometric property used in a mercury thermometer?
Not just a property of liquid but of all matter. All matter expands when heated and contracts when cooled, in thermometers the liquid, usually an alcohol, expands when heated lengthening the little line.
What does matter do when it is heated?
Matter expands when it is heated.
