The amount or size of physical quantity depends on two things " number and unit".
Every physical quantity has its own standard for fixed amount which is called as unit. The same physical quantity with larger or smaller size is measured in different units. for example 1cm or 1m
Therefore even if we have to measure same physical quantity with larger or smaller size of it we should have a standard for comparison.
standard
A comparison between an unknown quantity and a standard is known formally as a measurement. In essence, by taking a measurement of a standard against an unknown quantity, you are creating your own system of measurement.
A standard use for a measurement of a physical quantity is called the unit of that physical quantity
A Standard.
A "standard". In manufacturing, it may be refered to as a "master" when used to calibrate instruments that measure size, but it is still a standard.
To measure a physical quantity correctly and need to compare it with some standard quantities. Thus a standard unit is needed to measure a quantity correctly.
A unit of a physical quantity is a standardized quantity used to express measurements. These units help provide a clear and consistent way to quantify different physical properties such as length, mass, time, and temperature. Units allow for effective communication and comparison of measurements across different contexts.
A "standard". In manufacturing, it may be refered to as a "master" when used to calibrate instruments that measure size, but it is still a standard.
A "standard". In manufacturing, it may be refered to as a "master" when used to calibrate instruments that measure size, but it is still a standard.
A benchmark is a specific quantity or value that is used as a point of reference for comparison. It helps to assess performance, track progress, and make informed decisions based on relevant standards or goals.
dear friend, simply measurement means the comparison of any unknown quantity with a known quantity.for ex, when we measure rice using a balance.we usually put one standard quantity in one pane while we put the unknown quantity in another pane.so, isn't this a comparison
Yes, that is correct. The value of a standard unit of a physical quantity remains constant regardless of the place or time. For example, the standard unit of length, the meter, is the same value whether you are in New York or Tokyo, now or a hundred years ago.