1, the simple density meter into the water, simple density meter floating vertically in the water, with a scale to measure the depth of immersion in the water, h water.
2, take out the simple density meter, put the egg into the water, and add salt, keep stirring with the simple density meter, until the egg is suspended in the salt water.
3, remove the egg, and then the simple density meter floating vertically in the brine, the same measure of the depth of immersion h brine.
Set the cross-sectional area of the simple density meter for S, the density of water is ρ water,
density meter floating on the water surface by the buoyant force: F floating water = ρ water gV drainage = ρ water gSh water,
the density of salt water is ρ brine, the density meter floating on the surface of the salt water by the buoyant force: F floating salt = ρ brine gV drainage salt = ρ brine gSh brine,
two kinds of In the case of the density meter are floating on the surface of the liquid, by the buoyant force are equal to its gravity: F floating salt = F floating water = G,
∴ ρ brine gSh brine = ρ water gSh water,
∴ ρ brine h brine = ρ water h water,
∴ the density of the eggs: ρ eggs = ρ brine =
| ρwater h water |
| h salt water |
Answer: experimental steps: 1, put the simple density meter into the water, the simple density meter floats vertically in the water, and measure the length of the submerged h water with a scale.
2, take out the simple density meter, put the egg into the water, and add salt, keep stirring with the simple density meter, until the egg is suspended in the salt water.
3, remove the egg, and then the simple density meter floating vertically in the brine, the same measure of the depth of immersion h brine. padding-bottom:1px;font-size:90%">ρ water h water