A thermometer is used to measure temperature - Leaving Cert Physics - Question b - 2020
Question b
A thermometer is used to measure temperature.
(i) What is meant by temperature?
(ii) Body temperature is 37 C. Convert this to kelvin (K).
A thermometer is based ... show full transcript
Worked Solution & Example Answer:A thermometer is used to measure temperature - Leaving Cert Physics - Question b - 2020
Step 1
What is meant by temperature?
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Answer
Temperature refers to the degree of hotness or coldness of an object, which is a measure of the average kinetic energy of the particles in that object. It quantifies how hot or cold a body is, commonly measured using scales such as Celsius, Fahrenheit, or Kelvin.
Step 2
Body temperature is 37 C. Convert this to kelvin (K).
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Answer
To convert from degrees Celsius to Kelvin, you can use the formula:
K=C+273.15
For body temperature:
K=37+273.15=310.15extK
Thus, 37 °C is equivalent to 310.15 K.
Step 3
What is a thermometric property?
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A thermometric property is a physical property of a substance that changes in response to temperature variations. This property is measurable and can be used to determine the temperature of the substance.
Step 4
Name one example of a thermometric property.
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One example of a thermometric property is color, as in thermochromic materials that change color with temperature changes.
Step 5
Describe an experiment to calibrate a thermometer.
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To calibrate a thermometer, the following steps can be followed:
Apparatus: Gather a beaker of water, a heat source, and both calibrated and uncalibrated thermometers.
Procedure: Heat water and measure its temperature with both thermometers at various known temperatures (e.g., ice water at 0 °C and boiling water at 100 °C).
Data Collection: Record the readings from both thermometers at these reference points.
Observation/Conclusion: Compare the readings of the uncalibrated thermometer against the calibrated one to identify discrepancies. A scale or graph can then be drawn to illustrate the relationship between the readings of the two thermometers and adjust the uncalibrated thermometer accordingly.
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