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Questions and Answers
What is the temperature range of a clinical thermometer?
What is the temperature range of a clinical thermometer?
Which thermometer is used to measure the temperature of different substances in a laboratory?
Which thermometer is used to measure the temperature of different substances in a laboratory?
What principle do both clinical and laboratory thermometers work on?
What principle do both clinical and laboratory thermometers work on?
What is a distinguishing feature of a clinical thermometer compared to a laboratory thermometer?
What is a distinguishing feature of a clinical thermometer compared to a laboratory thermometer?
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How does heat transfer occur through conduction?
How does heat transfer occur through conduction?
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Which type of thermometer is suitable for measuring human body temperature?
Which type of thermometer is suitable for measuring human body temperature?
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What is the temperature range of a laboratory thermometer?
What is the temperature range of a laboratory thermometer?
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In which thermometer do you find a thermometric liquid inside a bulb?
In which thermometer do you find a thermometric liquid inside a bulb?
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Which thermometer's principle involves the expansion of liquids?
Which thermometer's principle involves the expansion of liquids?
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What is a common feature between clinical and laboratory thermometers?
What is a common feature between clinical and laboratory thermometers?
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Study Notes
Infrared Thermometer
- Allows temperature measurement without contacting the body
- Captures body heat from infrared radiations emitted by the body
Temperature Scales
- Celsius scale (Centigrade scale) denoted by 0°C
- Fahrenheit scale denoted by 0°F
Conversion of Units
- Celsius to Fahrenheit: 0°F = 9/5 × 0°C + 32 or 0°F = 1.8 × 0°C + 32
- Fahrenheit to Celsius: 0°C = (0°F – 32) × 5/9 or 0°C = (0°F – 32) / 1.8
Temperature Definitions
- Melting point: The temperature at which a substance changes from solid to liquid state
- Boiling point: The temperature at which a substance changes from liquid to gaseous state
- Freezing point: The temperature at which a substance changes from liquid to solid state
Thermometric Liquids
- Mercury and alcohol are commonly used thermometric liquids
Types of Thermometers
- Laboratory thermometer: Used in laboratories to measure temperature of solutions or reagents
- Clinical thermometer: Used at home/hospitals to measure body temperature
Clinical Thermometer
- Made of a long, narrow, glass tube with a bulb at one end
- Temperature scale is marked on the glass tube
- Bulb consists of mercury
- Mercury expands or contracts with temperature change
Importance of Kink in Clinical Thermometers
- Prevents mercury level from falling on its own as soon as the thermometer is taken from the body
Digital Thermometer
- Most accurate and quickest way to take a temperature
- Contains a sensor that helps measure body temperature
Comparison of Laboratory and Clinical Thermometers
- Similarities: Both have long, uniform glass tubes and contain thermometric liquids
- Differences: Temperature range, usage, and presence of kink
Transfer of Heat
- Heat energy always flows from a region of higher temperature to a region of lower temperature
- Main ways of heat transfer: Conduction, Convection, and Radiation
Conduction
- Process of heat transfer by collision of molecules
- Generally seen in solids
- Occurs when molecules near the source of heat gain thermal energy and begin to vibrate faster
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Description
This quiz covers topics related to infrared thermometers, contactless temperature measurement, and the Celsius and Fahrenheit temperature scales. It also includes questions on converting temperatures between Celsius and Fahrenheit scales using specific formulas.
