Summary of En su justa medida: Sistema Internacional de Unidades (capítulo completo) - Canal Encuentro

00:00:00 - 00:20:00

The video discusses the international system of units, which is a set of standards for measuring quantities such as mass, length, time, and electricity. The system is based on the measurement of light and is one of the fundamental units of the system. Metrologists use the system to calibrate and compare instruments around the world.

• 00:00:00 The system of international units (SI) is a set of standardized measures used throughout the world. Everyday situations call for measures like the amount of food required for a meal, the time it takes to get to work on time, or the amount of electricity used in a month. In the early 1900s, metrologists established the second, kilogram, meter, mol, amper, kelvin, and candela as the seven fundamental units of the SI system. Later, other SI units emerged, such as frequency or surface area. Accurate measurement of these quantities depends on prices and payments, as well as tax revenues. A kilogram of oranges costs around 530 Colombian pesos, but if a person buys oranges daily at the same store, the difference in price would amount to a few Colombian pesos. If an error of 10 grams were made when weighing a ton of cereal, it would be practically meaningless, but it would result in a difference of tens of millions of pesos in the price of a product on the market. Metrologists are responsible for determining the naming of each unit within the SI system, and over the years they created a style manual for writing symbols for the units. However, the symbols for some units are
• 00:05:00 The video discusses the international system of units, which is a small but important system used to avoid confusion with the number 1 or the letter "A". The system is based on the kilogram, which is the unit of mass and the brother of the kilogram. There are seven units in the system, each with special characteristics that have been modified over time in order to achieve greater accuracy. Some people find the painting very archaic. Today's patterns for each magnitude are not corporated into an artifact, but represented through physical processes. Except for the kilogram, which is based on a physical prototype, the other six units are based on mathematical processes. It is unclear if one of these units, the kilogram, has undergone any changes in the past hundred years that would make it inaccurate. Scientists are working to define an atomic kilogram, based on a fixed amount of atoms or an electrical kilogram, through the so-called balance of war. This would avoid logical modifications to any material, even that of a very stable alloy like iridium and platinum. And measuring for running is based on a length of track that depends on the measuring device used by ancient civilizations. In medieval times, different units of measurement were used by different lords in each region, making communication
• 00:10:00 The international system of units (SI) is a system of measurements based on the metric system. The SI is divided into seven units: the meter (m), the second (s), the kilogram (kg), the ampere (A), the Kelvin (K), the mole (mol), and the candela (cd). The meter, second, and kilogram are defined as the length, mass, and time units, respectively. The ampere, Kelvin, mole, and candela are defined as the units of electric current, thermodynamic temperature, amount of substance, and luminous intensity, respectively. The SI is constantly being improved in order to be more precise. For example, the meter was replaced by the kilometer in the mid-19th century, and the second was replaced by the second as the unit of time in the early 20th century. Today, the SI is based on the measurement of light waves through an element called the obsesión. The obsesión has a constant wave length and frequency, and is capable of measuring time with a precision of almost 100 times that of the cesium atom. The SI is also being improved with the development of atomic clocks that can measure time with a precision of almost
• 00:15:00 In this video, Newton's laws of motion are explained in detail, and it is shown that it is impossible to have two perfectly parallel conductors of infinite length. This is because meteorologists use an alternate definition of amper which avoids these types of experiments. It is possible that the future electric power pattern will be based on the counting of electrons, which is a work for nanotechnology. The intensity of a storm's lightning is measured in thousands of Amps, a canal has a current of 10 Amps, and a light bulb has a current of 0.25 Amps. Mass, length, time, and electricity are all turned over to the quantity of matter unit in this video, with mole (a unit of mass composed of atoms or molecules) being introduced as a general term for all such quantities in chemistry. First clarification: mass is not the same as magnitude. How do we distinguish them? Imagine that all factory workers entering the plant are atoms. Suppose each atom weighs 70 kg, and that there are 100 of them in a total of 700 kg. Then 100 atoms represent a molecule, and 700 kg is equal to 7,000 kg each. Mass is the total number of particles in a system, while magnitude is the number of
• 00:20:00 The video discusses the international system of units, which is a set of standards for measuring quantities such as mass, length, time, and electricity. The system is based on the measurement of light and is one of the fundamental units of the system. Metrologists use the system to calibrate and compare instruments around the world. Measurement is a way to communicate and metrologists strive to perfect the devices and patterns so that uncertainty is reduced to zero. This allows for technological and economic advantages.