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小明说今天我把100斤煤从楼底搬到12米高的楼上，对煤做了功，煤的内能一定增大了，燃烧时将会放出更多的热量．小明的说法是把机械能与内能混淆了．那么机械能和内能有哪些区别呢？可从下面几个方面来区分．1．从定义上区别：动能和势能统称为机械能．这里所指的动能是指整个
Xiao Ming said that today I moved 100 kilograms of coal from the bottom of the building to a height of 12 meters above the ground and did a bit of work on coal. The internal energy of coal must be increased, and more heat will be released when burning. Xiaoming’s argument is to confuse mechanical energy with internal energy. What is the difference between mechanical energy and internal energy? Can be distinguished from the following aspects. 1. Differentiate from the definition: kinetic energy and potential energy are collectively referred to as mechanical energy. The kinetic energy here refers to the entire