Heat transfer by convection

Ever been by the beach when it was sunny? On a clear day, on the beach, there is always wind blowing from the sea. Why is there always a wind on the beach and why do the sea breeze (winds blowing from the sea to the land) occur during the day, the land breeze (winds …

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Heat transfer by conduction

1. Definition of the heat transfer by conduction If you sit in a wooden chair, the surface of the wooden chair becomes warm. Conversely, if you sit in a chair made of plastic or metal, the surface of a metal or plastic chair does not feel warm after sitting. Why is the surface of the …

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Definition of heat Mechanical equivalent of heat Equation of heat

Article Definition of heat Mechanical equivalent of heat Equation of heat 1. Definition of heat If objects that have temperature differences touch each other, there will be heat transfer from high-temperature objects to low-temperature objects. Heat transfer stops after touching objects reach the same temperature. For example, if we mix hot water with cold water, …

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Linear expansion

Most solid objects experience a linear expansion when the temperature changes. The linear expansion is the length of the object increases or the length of the object decreases. Usually, the length of the object increases when the temperature increases, whereas the length of the object decreases when the temperature drops. You might think that linear …

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Conversion of temperature scale

The Celsius scale and the Fahrenheit scale are different temperature scales. If the temperature of an object is measured and expressed on a Celsius scale, then we want to state the temperature of the object on the Fahrenheit scale then we change it from the Celsius scale to the Fahrenheit scale. In this section, we …

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Thermometers and temperature scales

1. Thermometers The tool designed to measure temperature is a thermometer. There are many types of thermometers, but the working principle is the same. Usually, we use thermometric objects, the nature of matter that changes with temperature. If the temperature of the object changes, the shape, and size of the object also changes. Most thermometers …

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The Zeroth Law of Thermodynamics

So far we have only observed the thermal equilibrium experienced by two objects in contact. To understand the concept of thermal equilibrium in more depth, let’s review three objects (say objects A, object B, and objects C). For example, object B and object C do not touch each other, but object A in contact with …

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