Guide
1
Imagine being given a certain vessel, filled to the brim with water.The problem we need to find the density of water, without knowing any weight or volume.In order to calculate the density of the two parameters must be found experimentally.Start with the definition of mass.
Take the container with water and put it on the scales.Then pour out the water, and then again put a vessel on the same scale.Compare results of measurements and get the formula for finding the body of water:
mob.- ms. = MW. Where the Mob.- Mass of the dish with water (total weight), ms - mass of the dish without water.
second it takes to find - it is the volume of water.Pour the water into a measuring vessel then available on the scale it dete
rmine what volume of water contained in the vessel.Only then the formula get the density of water:
ρ = m / V
With this experience we can only approximately determine the density of water.However, under the influence of some factors it can fluctuate.Check out the most important of these factors.
2
When the water temperature t = 4 ° C water has a density of ρ = 1000 kg / m ^ 3 or 1 g / cm ^ 3.When the temperature and density changes.In addition, the factors influencing the density include pressure, salinity and salinity.The most pronounced effect on the density of the temperature.
Remember that the density under the influence of temperature changes on the parabolic law.The value t = 4 ° C is the critical point of this parabola, where the density of water reaches the highest value.Any temperature above or below this value, leads to a decrease in density.At 0 ° C water density is significantly reduced.
3
mineralization and the pressure acting on the density of water is the same.With their increasing density increases.Also, a significant density of water is directly proportional to the concentration of salt in it.
There are also other factors that determine the density of water, but their effect is significantly weaker than that described above.