In response to the usual question, "What is the weight per liter of water?"most people will offer a glimpse into a directory or simply say: "One kilogram."Indeed, at a temperature of 400C and under normal atmospheric pressure, the weight of one liter of distilled, that is devoid of any impurities, water is exactly 1 kg.And who will be able to clearly answer the question "What is the weight of salt per liter of water source?"or "What is heavier than water - hot or cold?"
In order not to be trapped, need to be familiar with some basic laws of physics.For more specifics should immediately mention that in our article focuses not on the weight of water, and its weight.The difference between the terms that the weight - a fundamental indicator of the amount of substance, and it is measured in kilograms, and the weight - the value of showing how hard pressing body with a certain weight to the surface;unit of measure - Newton.
To answer the question of how much a liter of water weighs 1, first see the sum of some indicators of body weight.Of course of physics we know that the mass is the product of the density of matter by a factor of acceleration of gravity, which is approximately the same over the entire surface of our planet and is equal to 9.81 kg / m2.Fluctuations of these two values and give us the difference in mass of the same material under different conditions.
First, let's talk about the density of the liquid.As mentioned above, the density of pure water under normal conditions is 1000 g / m3.If it add impurities such as salts, the density will increase and the water will become worse.As for the mass of the object, depending on the temperature, it is all a matter of the properties of matter expands when heated.This means that the distance between the molecules becomes larger, and their total number per unit volume decreases, hence the material becomes easier.However, water has the unique property - not only it expands when heated, and upon cooling (because of this burst water pipes in winter).The highest density of water is at the freezing point, at the slightest deviation of thermal scale, it becomes easier.What is the weight per liter of water at different temperatures, if desired, can be found in the directory.
Atmospheric pressure is not so much affected by fluctuations in the liquid mass, temperature, and the result of its action is opposite to high temperatures.At high pressure, the distance between the molecules is reduced, thus, at one and the same volume will include larger amount of substance.As a result, there is and increase in weight.This can be easily seen in practice, if the weigh tank of compressed air and a cylinder of air under normal pressure.
By the way, you know how much a liter of water weighs on the pole?0.5 percent more than at the equator.This phenomenon is caused by the Earth's rotation around its axis.Because of him, the centrifugal acceleration increases as we approach the equator, and therefore increases the acceleration of gravity.
Arguing similarly, we can calculate how much weight each liter of fluid, and how this figure will vary depending on environmental conditions.
