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所谓“二合一”问题,就是指由两种物质混合在一起,其质量为两种物质之和,其体积为两者之和等特点。此类题有着特殊的解题规律,解法大同小异。其关键是抓住密度、质量、体积之间的等量关系,代人相关的表达式和数据,便可解出结果。例1一件工艺品用金和铜制成,它的质量是20kg,体积是1.8dm3,求这件工艺品中金和铜
The so-called “two-in-one” problem refers to the combination of two substances, the quality of which is the sum of two substances, and the volume of which is the sum of the two. This type of problem has a special law of solving problems, and the solution is very similar. The key is to grasp the equal relationship between density, mass, and volume, and formulate relevant expressions and data to solve the problem. Example 1 A handicraft made of gold and copper with a mass of 20kg and a volume of 1.8dm3. Seek gold and copper in this handicraft.