To calibrate a thermometer, a thermometric property and two fixed points are needed - Leaving Cert Physics - Question a - 2005
Question a
To calibrate a thermometer, a thermometric property and two fixed points are needed.
What does a thermometer measure?
What are the two fixed points on the Celsius... show full transcript
Worked Solution & Example Answer:To calibrate a thermometer, a thermometric property and two fixed points are needed - Leaving Cert Physics - Question a - 2005
Step 1
What does a thermometer measure?
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Answer
A thermometer measures temperature, which is a physical quantity that indicates the degree of heat or cold of an object. It expresses how hot or cold the substance is in relation to a predefined scale.
Step 2
What are the two fixed points on the Celsius scale?
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Answer
The two fixed points on the Celsius scale are:
The melting point of ice, defined as 0°C.
The boiling point of water, defined as 100°C under standard atmospheric pressure.
Step 3
Explain the term thermometric property.
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The term thermometric property refers to a physical property of a substance that changes in a measurable and continuous manner with variations in temperature. This property could be expansion of liquids, electrical resistance, or changes in volume, among others. It is utilized to indicate the temperature on a thermometer.
Step 4
Name the thermometric property used in mercury thermometer.
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The thermometric property used in a mercury thermometer is expansion. Specifically, it is the expansion in length of the mercury column as the temperature increases.
Step 5
Give an example of another thermometric property.
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An example of another thermometric property is the electrical resistance of a thermistor, which varies with temperature changes. Other examples include pressure of a gas at constant volume or the color response of certain crystals to temperature changes.
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