1.用比例法解物理题比例法就是利用物理量间的比例关系解题,它可使解题过程清晰、简明,达到事半功倍的效果。例1:有一物体在空气中称为250克,浸没在水中称为150克,浸在某种液体中称为130克,求这种液体的密度。解:物体浸在水中和液体中受到的浮力分别为F1和F2,体积用V表示F1=ρ 1. Using the proportional method to solve the physical problem The proportional method is to use the proportional relationship between the physical quantities to solve the problem, which can make the problem-solving process clear, concise, and achieve a multiplier effect. Example 1: There is an object called 250 grams in air, 150 grams immersed in water, immersed in a liquid called 130 grams, find the density of this liquid. Solution: The buoyancy of objects immersed in water and in liquids is F1 and F2, respectively. Volume is represented by V. F1=ρ