我们在厨房里,若留心看一下其中的炉灶、器皿以及做饭、炒菜中出现的一些现象,定会发现很多处要用到物理知识。 一、热凉粥或冷饭时,锅内发出“扑嘟、扑嘟”的声音,并不断冒出气泡来,但一尝,粥或饭并不热,这是为什么? 把凉粥或饭烧热与烧开水是不一样的。虽然水是热的不良导体,对热的传导速度很慢,但水具有很好的流动性。当锅底的水受热时,它就要膨胀,密 In the kitchen, if we look carefully at the stoves, utensils, and some of the phenomena that occur in cooking and cooking, we will find that we need to use physical knowledge in many places. First, when hot porridge or cold rice is cooked, the inside of the pot emits a “beep, beep” sound and bubbles continue to come out, but a taste, porridge or rice is not hot, why is this? To cool porridge or rice Heat is not the same as boiled water. Although water is a poor conductor of heat, the conduction speed to heat is slow, but water has good fluidity. When the water in the bottom of the pot is heated, it will swell.