Measure action
The concept of measurement refers to the action and result of measuring; they carried out a measurement on the house in order to appraise it and later sell it ”. While, to be measured, the action of comparing a certain quantity with its respective unit is indicated, with the clear purpose of knowing how many times the second is contained in the first.
So, more specifically, measurement is the determination of the ratio between the dimension or event of an object and a certain unit of measurement. In order to carry out the measurement of whatever, it will be necessary that both the dimension of the object and the unit correspond to the same magnitude.
When you are measuring anything, you must be as careful as possible not to alter the system, although the margin of error is always considered present, either due to imperfections that the meter, instruments or even errors may present. experimental, it should be tried that it is the minimum possible.
Need for a standard that acts as a unit of measurement
The pattern that makes it easier to carry out measurements is known as the unit of measure and must meet three basic conditions: universality (used in all countries of the world), unalterable (It may not present variation in time or by whoever makes the measurement), reproducible.
To facilitate the question, scientists have put together the most convenient standard type units and developed the unit systems, for example the International System (S.I.), the aforementioned was coined in the year 1960 at the XI General Conference of Weights and MeasuresThe following are the fundamental magnitudes that were taken: length, mass, time, thermodynamic temperature, amount of substance, light intensity, plane angle, solid angle and electric current intensity.
The result of a measurement is known as a measurement.
If the measurement is made through a measuring instrument created for this purpose, it will be called direct measurementMeanwhile, when this condition is not met because there is no adequate instrument that allows us to measure, for example, in cases where the thing to be measured is very large or very small, the measurement must be made through a variable that allows to calculate a different one and then, it will be considered as a indirect measurement.
The relevance of measuring instruments in the measurement process
We must also highlight in the development of this action the preponderant role that measurement instruments usually occupy, tools that precisely assist in this task to develop it in the most efficient and precise way possible.
What is it and how it works?
The measuring instrument is a device that is used to buy physical quantities through the measurement procedure. As measurement units, parameters or standards are used and from this measurement process a number will result that marks the relationship between the object and the reference unit.
Requirements
However, these instruments must meet certain conditions, including: precision (the ability to provide the same result in various measurements performed under the same conditions), accuracy (implies the ability to measure a value very close to the value of the real magnitude), appreciation (the smallest measurement that the instrument is capable of perceiving) and sensitivity (it is the displacement relationship between the measurement indicator and its real measurement.
The most used instruments
There is a huge variety of measurement tools to measure various magnitudes, among the best known we will highlight the rulers, scales, chronometers, microscopes, thermometers, clocks, calendars, tape measures, protractor, barometer, speedometers, ammeters, pipettes and seismograph , among others.
Rulers and tape measures allow us to measure the length of something; scales give us the numbers of the mass of an object; we can measure time through clocks and calendars; the transport is the tool for measuring angles; We can know the temperature of a body through the thermometer; We know the pressure thanks to the barometer; The speed of a car is measured by its speedometer for example; the electric current is measured by the ammeter; pipettes allow us to know the figures of a volume; and seismographs are the most used instruments when it comes to having to measure the intensity of an earthquake.
