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To read a Mercury thermometer accurately, hold it at eye level and make sure the mercury level is below your body temperature. Wait for a few minutes for the mercury to stabilize, then read the temperature at the point where the mercury stops. Be sure to note the temperature in whole numbers and avoid parallax errors by looking straight at the thermometer.
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How is a glass thermometer read accurately?
To read a glass thermometer accurately, hold it at eye level and look at the level of the liquid inside the tube. The temperature is where the liquid stops rising. Make sure the thermometer is clean and not tilted for an accurate reading.
What are the characteristics of the liquid ( alcohol ) used in a glass thermometer?
The liquid in a glass thermometer, commonly alcohol or mercury, expands and contracts with changes in temperature, allowing the thermometer to accurately measure temperature. Alcohol has a lower boiling point than mercury, making it safer for home use. Alcohol thermometers are typically red-colored to make them easier to read.
What is least count for thermometer?
The least count of a thermometer is the smallest temperature difference that it can measure accurately. Typically, for a standard mercury-in-glass thermometer, the least count is 0.1°C.
How does mercury work in a thermometer to measure temperature accurately?
Mercury in a thermometer expands and contracts with changes in temperature. As the temperature rises, the mercury expands and rises in the tube, and as the temperature falls, the mercury contracts and lowers in the tube. This movement is then converted into a temperature reading on the scale of the thermometer, allowing for accurate temperature measurement.
Why Mercury does not touch the walls thermometer?
Mercury does not touch the walls of a thermometer because it expands when heated, filling the space within the thermometer tube without coming into contact with the walls. This expansion is what allows mercury to accurately measure changes in temperature by rising and falling within the tube.
How mercury functions in a thermometer?
Mercury, like most substances, expands when it gets hotter and contracts when it gets colder. A mercury thermometer is designed so that the volume of the mercury can be accurately observed, as the mercury rises or falls in a marked column.
How is a glass thermometer read accurately?
To read a glass thermometer accurately, hold it at eye level and look at the level of the liquid inside the tube. The temperature is where the liquid stops rising. Make sure the thermometer is clean and not tilted for an accurate reading.
How to read a thermometer accurately?
To read a thermometer accurately, first make sure it is clean and at room temperature. Hold it at eye level and read the temperature where the liquid inside the thermometer stops moving. Take note of the temperature markings and any numbers on the scale to determine the accurate reading.
What are the characteristics of the liquid ( alcohol ) used in a glass thermometer?
The liquid in a glass thermometer, commonly alcohol or mercury, expands and contracts with changes in temperature, allowing the thermometer to accurately measure temperature. Alcohol has a lower boiling point than mercury, making it safer for home use. Alcohol thermometers are typically red-colored to make them easier to read.
What is least count for thermometer?
The least count of a thermometer is the smallest temperature difference that it can measure accurately. Typically, for a standard mercury-in-glass thermometer, the least count is 0.1°C.
How does mercury work in a thermometer to measure temperature accurately?
Mercury in a thermometer expands and contracts with changes in temperature. As the temperature rises, the mercury expands and rises in the tube, and as the temperature falls, the mercury contracts and lowers in the tube. This movement is then converted into a temperature reading on the scale of the thermometer, allowing for accurate temperature measurement.
Why Mercury does not touch the walls thermometer?
Mercury does not touch the walls of a thermometer because it expands when heated, filling the space within the thermometer tube without coming into contact with the walls. This expansion is what allows mercury to accurately measure changes in temperature by rising and falling within the tube.
What is the substance in a thermometer that tells us the temperature?
The substance in a thermometer that tells us the temperature is usually mercury or alcohol. These substances expand or contract in response to temperature changes, allowing the thermometer to measure the temperature accurately.
What is red substance in thermometer?
The red substance in a thermometer is typically mercury. Mercury is used in thermometers because it expands and contracts uniformly with changes in temperature, making it an effective liquid for measuring temperature accurately.
What is the function of thermometer mercury?
The Mercury expands with temperature. Since expansion is linear over the normal range of a mercury-driven thermometer, the level of mercury within a little glass tube indicates the current temperature of the thermometer's immediate environment.
How does a thermometer measure temperature accurately?
A thermometer measures temperature accurately by using a substance that expands or contracts with changes in temperature, such as mercury or alcohol. As the substance expands or contracts, it moves along a scale to indicate the temperature. The thermometer is calibrated to ensure accurate readings.
Why Mercury thermometer is used domestically and alcoholic thermometer in lab?
Mercury thermometers are used domestically because they are reliable, have a wide temperature range, and are easy to read. Alcoholic thermometers are used in labs because they are non-toxic and can measure a wide range of temperatures accurately. Additionally, they have a lower risk of shattering compared to mercury thermometers.
