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-273.15

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How to tell if hot: If it has more heat energy

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A Thermocouple is a sensor used to measure temperature. Thermocouples consist of two wire legs made from different metals. The wires legs are welded together at one end, creating a junction. This junction is where the temperature is measured. When the junction experiences a change in temperature, a voltage is created. The voltage can then be interpreted using thermocouple reference tables to calculate the temperature.

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-Calibration of a thermometer is really important .
-Because if we do not calibrate the thermometer
it could show the wrong temperature .

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-It is the thermometer which there be liquid in the thermometer itself.
-The liquid usually used is mercury.
-This liquid has been around for 300 years.
-it is oftenly use in the lab

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1. Traditional/Analogue Thermometer: Normally uses mercury or alcohol to measure temperature.
2. Infrared Thermometers: These thermometers use infrared rays to measure the body’s temperature.
3. Digital Thermometer: Uses electronic heat sensors to detect body temperature.

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-liquid in glass thermometer
-calibration

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* Celsius to Fahrenheit: Multiply by 9/5, then add 32
* Celsius to Kelvin: Add 273.15
* Fahrenheit to Celsius: Minus 32, then divide by 5/9
* Fahrenheit to Kelvin: Minus 32, divide by 5/9, then add 273.15
* Kelvin to Celsius: Minus 273.15
* Kelvin to Fahrenheit: Minus 273.15, multiply 9/5, then add 32

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- Celsius (°C), also called centigrade: invented by  the Swedish astronomer Anders Celsius in 1742
- Fahrenheit (°F): by a German physicist Daniel Gabriel Fahrenheit in 18th Century (commonly used in English-speaking countries until the 1970s)
- Kelvin (K): by a British physicist William Thomson, 1st Baron Kelvin in 1848; The base unit of thermodynamic temperature measurement; Adopted as the International Standard for scientific temperature measurement.

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- What are the different scales?
- Conversion