In the inquiry experiment of "measuring the density of small stones with tray balance and measuring cylinder": (1) One group designed the following experimental steps: ① placing the balance horizontal

In the inquiry experiment of "measuring the density of small stones with tray balance and measuring cylinder": (1) One group designed the following experimental steps: ① placing the balance horizontally. (1) Adjust the balance nuts at both ends of the beam so that the pointer is located at the center line of the indexing plate; Pour an appropriate amount of water into the measuring cylinder, and write down the scale value V 0 (2)m/(V- V 0) corresponding to the water surface.

Analysis of test questions: In the inquiry experiment of "measuring the density of small stones with tray balance and measuring cylinder", the balance is placed on a horizontal table; Move the travel code to the zero scale line at the left end of the balance scale; Adjust the balance nuts at both ends of the beam so that the pointer is located at the center line of the reticle; Put the small stone to be measured into the left plate of the balance, increase or decrease the code of the right plate and move the code until the balance beam is balanced, and record the quality of the small stone; Pour an appropriate amount of water into the measuring cylinder, and record the scale value v0 corresponding to the water surface; After the pebbles are tied with fine iron wire, they are slowly immersed in the water in the measuring cylinder (the water does not overflow), and the corresponding water surface scale value V is recorded; Calculate the density ρ of pebbles according to the measured data. The volume of small stones is equal to V- V 0, and the density of small stones is ρ = m/(v-v0).

Comments: This topic pays attention to measuring the mass of small stones with a balance, measuring their volume with a measuring cylinder, and finally calculating the density.