题:现有一小金属块,实验室备有调好的天平、砝码、烧杯、足够的水、细线等。请你自行选择仪器,进行必要的测量后,计算小金属块的密度。要求:(1)写出实验步骤并用适当的符号表示要测量的物理量;(2)写出计算金属块密度的表达式。(选自学科竞赛辅导)1排水法方法1:1用天平测出金属 Question: There is a small metal block in the lab. The lab has a balance, weights, beakers, enough water, and fine lines. Please select the instrument yourself and make the necessary measurements to calculate the density of the small metal block. Requirements: (1) Write down the experimental procedure and use appropriate symbols to represent the physical quantity to be measured; (2) Write an expression that calculates the density of the metal block. (Selected from the discipline competition counseling) 1 Drainage method method 1:1 Measure metal with balance