To measure, or measuring is the use of units to find a size of quantity
A vector quantity has both size (magnitude) and direction involved but a scalar quantity only has size involved and not direction.
a vector
volume
The "size" of a vector quantity - such as a force - is often called a MAGNITUDE.
Speed is a measure of how fast an object is going. This is a scalar quantity, which means it only gives magnitude (size) information. Velocity is a vector quantity, which is very similar to speed, but it also includes direction information.Example:Speed of car = 60 km/hVelocity of car = 60 km/h in a Northwesterly direction
If something is measured, it means a quantity is established by some means. This could be size, weight, temperature, speed, and so on.
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.
Size is usually how large. Quantity is how many.
A standard unit of measurement is the unit (size or quantity) that is agreed upon in that nation or trading partnership. In science the standard units of measurement are called SI units. (An international standard). This is the metric system.
A vector quantity has both size (magnitude) and direction involved but a scalar quantity only has size involved and not direction.
size
The absolute value IS the size of a quantity.
Enormous means very large in size, quantity and extent. It is huge, vast, extensive and without limit
Displacement is a vector quantity. This means it has both size AND direction. Therefore, displacement is defined as distance in a given direction. Rather then simply 'distance'. Distance itself is a scalar quantity... and only has size. No direction. 20m - Distance. 20m upwards - Displacement.
A scaler quantity is one with magnitude (size) only. ie. not direction dependent. Speed is a scaler quantity, however, velocity is a vector quantity, it has size and direction.
A size or direction
It means that you find out the size of part of the number but not all of it.