a short essay on heat
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Answer:
Relationship between the Theory of Thermal and Material Kinetics 1 The theory of matter dynamics states that all particles of matter are in active motion. This theory helps to predict heat transfer. There is no doubt that the transfer of heat is the kinetic energy caused by the swinging of atoms or molecules in the material. The faster the particle moves, the more heat is generated and the molecule can move further away. This theory explains the heat transfer by conduction. Thermal energy flows out from a high temperature object and then warms by low temperature objects.
Heat transfer is the process of transferring heat from a high temperature reservoir to a cold reservoir. For thermodynamic systems, heat transfer is the transfer of heat through the boundary of the system due to the temperature difference between the system and the surrounding environment. Heat transfer may occur in the system due to the temperature difference at various points in the system. Temperature difference is considered "potential" to pass heat, and heat itself is called flow.
What is heat transfer What is conduction heat transfer What is convective heat transfer? What is radiative heat transfer
The difference between heat and temperature is subtle but very important. Heat refers to the transfer of energy between systems (or objects), and the temperature is determined by the energy contained in a single system (or object). In other words, heat is energy and temperature is a measure of energy. A change in temperature occurs as a result of heat or, conversely, a lack of heat, as increasing the heat increases the temperature of the body and the temperature decreases when removing the heat.
Heat and temperature Temperature and thermophysics focus on energy research. Energy has various forms - heat, light, sound, electricity, kinetic energy, potential. All of these forms of energy have power to work. Some form of energy can be converted to another form. For example, potential (stored chemistry) energy is converted to heat during the combustion process. Kinetic energy (due to friction) and electrical energy can also be converted to heat. It is impossible to measure calories directly. This is a measure of total kinetic energy of atoms or molecules in the body. Since heat is a form of energy, the measurement unit is Joules (J) or kilojoules (kJ). The amount of heat of the body depends on body temperature, quality, material. Heat energy is always transferred from high temperature objects to low temperature objects. It does not depend on the quality or material of the objective
Answer:
Heat energy is a form of energy that transfers among particles in a substance (or system) by means of the kinetic energy of those particles. In other words, under kinetic theory, the heat is transferred by particles bouncing into each other .” Heat is thermal energy. When you add heat to a substance, you are adding energy. Heat transfers throughout our environment all the time. Wherever you are, you are aware of things that are warm or cold. When deciding what we will where for the day, we pay attention to how hot or cold it is outside. Heat is everywhere and can be transferred through three processes known as conduction, convection, and radiation.
“Conduction occurs when two objects at different temperatures are in contact with each other. Heat flows from the warmer to the cooler object until they are both at the same temperature. Conduction is the movement of heat through a substance by the collision of molecules. At the place where the two object touch, the faster-moving molecules of the warmer object collide with the slower moving molecules of the cooler object. As they collide, the faster molecules give up some of their energy to the slower molecules. The slower molecules gain more thermal energy and collide with other molecules in the cooler object. This process continues until heat energy from the warmer object spreads throughout the cooler object. Some substances conduct heat more easily than others. Solids are better conductor than liquids and liquids are better conductors than gases. Metals are very good conductors of heat, while air is a very poor conductor of heat
Cooking: Have you ever cooked on the stove? Whether you are cooking eggs or steaks or hamburgers, when you place that pan on the stove-top you are applying conduction. The heat from the hot stove-top transfers from the stove to the pan and is used to cook our food.
A Cup of Coffee: When a ceramic coffee cup is filled with hot tea or coffee the heat transfers from the liquid into the material of the cup. If you touch the ceramic cup shortly after pouring hot coffee in it, you will notice it is really hot due to conduction. The handle on the cup will not be as hot though because not all heat will be at this point. This is why almost all ceramic cups have handles on them.
Soldering: Conduction is also used in the creation of nearly all electronics when they solder it. Soldering is a great example of heat transfer through conduction. When they solder electronics, the heat transfers from the soldering tool to where it is applied on the device.
Iron: When you are using an electronic iron you also use conduction. The iron heats up and when touched to the cooler object (shirt or pants) the heat is transferred to it. With the applied heat we can eliminate wrinkles in the clothing we wear