What is a material amount?

The amount of material is related to how much of something is in the place. Talks are measured using pounds or kilograms, but many scientists prefer matter that more objectively describes the material amount in a given sample. Because the mass is usually correlated with the weight in everyday situations, kilograms are also used to measure matter.

When chemists refer to the amount of particle material in the sample, they often use moths, which is a quantity that refers to about 6 x 10 ^{23 units of something, usually atoms or molecules. The large number is known as Avogadrov's number or Avogodro Constant, named after the Italian scientist Amedeo Avogadro, who at the beginning of the nineteenth century realized that the volume of gas is proportional to the material number of particles in the gas. The Avogodro number is defined as the number of atoms in exactly 12 grams of carbon.}

Until the system has lost or acquires atoms, although replacement with outside or nuclear cleavage/fusion, it retains the same amount of material for the periodČitou. There is a possibility that the protons that make up the core of the atoms spontaneously decompose after an extremely long time, but this has not been proven and there are little evidence in its favor.

The same amount of material can have a different weight depending on the planet is close. For example, on Jupiter you would have a tens of times larger than on the ground, so extreme that it would break the spine. On the contrary, on the surface of the Moon is gravity about 1/4 of the Earth's weight, so your weight is about 1/4, although your weight (and the material amount of particles in your body) remains the same.

Another instance where the amount of material can be constant, while the weight varies is when something moves very close to the speed of light. According to this to Einstein's theory of relativity, when something moves extremely fast, it approaches the speed of light, gaining weight. That's why the non -zero particleThe matter can never move at the speed of light - both its speed increases and its mass, making it difficult to accelerate. The energy requirements for continuing acceleration to the speed of light are endless - greater than the total amount of energy in space.