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# Temperature ### How does a vapour pressure thermometer (vapour-in-metal) work?

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This article provides answers to the following questions, among others: How do vapor pressure thermometers work?Why do vapor pressure thermometers have a non-linear scale? The less popular vapour pressure thermometers work according to...

### How does a gas filled thermometer (gas-in-metal) work?

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This article provides answers to the following questions, among others: How do gas filled thermometers work?What are the advantages of gas-in-metal thermometers compared to liquid-in-metal thermometers?How can the influence of the...

### Thermodynamic derivation of the Stefan-Boltzmann Law

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In this article the Stefan-Boltzmann-Law is to be derived using the laws of thermodynamics. This article provides answers to the following questions, among others: How can the Stefan-Boltzmann law be derived from the...

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### How does a liquid filled thermometer (liquid-in-metal) work?

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This article provides answers to the following questions, among others: How do a liquid-in-metal thermometers work?Why should the inner diameter of the coiled tube be kept as small as possible?How can large...

### Stefan-Boltzmann law & Kirchhoff’s law of thermal radiation

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The Stefan-Boltzmann law states that the radiant power of an object in thermal equilibrium is proportional to the fourth power of temperature and directly proportional to its surface! Learn more about...

### How does a resistance temperature detector (resistance thermometer) work?

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This article provides answers to the following questions, among others: How do resistance thermometers work?Why should the measurement current for an RTD be as low as possible?How can the temperature be determined...

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### Particle model of matter

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This article provides answers to the following questions, among others: What is the particle model of matter?How can the solid, liquid and gaseous states of matter be explained with the particle...

### How does a thermocouple work?

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This article provides answers to the following questions, among others: How does a thermocouple work?What is the Seebeck effect?What are the differences between the types of thermocouples?What is cold junction compensation?What are...

### How does a thermal imaging camera work?

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This article provides answers to the following questions, among others: How do thermal imaging cameras work?Why is the thermal image displayed in false colors? Thermal imaging cameras are based on the same principle...

### How does a infrared thermometer (pyrometer) work?

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This article provides answers to the following questions, among others: How do IR thermometers (pyrometers) work?What are the advantages of pyrometers? The thermometers presented in the previous articles must directly touch the object...

### Temperature scales

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This article provides answers to the following questions, among others: What is temperature in the physical sense a measure for?Which reference points are used as the basis for the Celsius scale and...

### Why does ice form on the top of a lake?

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Learn in this article why ice form always on top of a lake in winter. The negative thermal expansion of water (density anomaly) has an existential importance for life on earth. More...

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