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在日常生活中,当人们提到“能”的概念时,总是很自然地联想起炼铁时需要的热能,开动机器时需要的机械能,各种电器设备工作时需要的电能,以及夜晚照明时需要的光能等等。如果再追问一下,这些不同形式的能量是从哪里得到的呢?人们就会再联想起已被发现的煤炭、石油、天然气、铀矿、地热和水力等自然资源了。因为,这些资源物质在一定条件下,可以转换成人们平常生产和生活中所需要的热能、机械能、电能和光能。除此之外,还有一些物质的运动,如空气流动所形成的风能,水流动所形成的水能,以及这些能通过一定的设备可以转换成的机械能。这些被转换为能的物质或物质的运动就称为能源。
In everyday life, when people refer to the concept of “can,” they always naturally think of the thermal energy required for ironmaking, the mechanical energy required to start the machine, the electrical energy required for working with various electrical equipment, and the night lighting When the need for light energy and so on. If you ask again, where are these different forms of energy come from? People will then be reminded of the discovered natural resources such as coal, oil, natural gas, uranium, geothermal and water. Because, under certain conditions, these resource materials can be converted into the heat, mechanical energy, electric energy and light energy that people need in their daily life and production. In addition, there are some physical movements such as the wind energy created by the flow of air, the water energy formed by the flow of water, and the mechanical energy that can be converted by certain equipment. The movement of these substances or substances that are converted into energy is called energy.