牛奶是老少皆宜的营养滋补品,被营养学家誉为“最接近完善的食物”,但是市面上有些牛奶掺水较多.学完密度知识后,学生们知道可以通过测量牛奶的密度来鉴别其优劣.实验室常用天平测质量、量筒测体积,然后利用公式ρ=Vm计算出物体的密度.可是一般学生家没有天平和量筒这样的专业 Milk is a nutritious supplement for all ages and is praised by nutritionists as “the closest to perfect food”. However, there is a lot of milk in the market that is mixed with water. After learning about density, students know that they can measure the density of milk. Identify the pros and cons. The laboratory uses the balance to measure the mass and measure the volume of the cylinder. Then the formula ρ=Vm is used to calculate the density of the object. However, the average student’s home does not have a balance and graduated cylinder.