Which Definition of Physical Quantity is Clearer and More Accurate?

[johncena]

Which definition is more clear and correct ?
1)Any thing that has a measurement is called a physical quantity.
2)Characteristics that can be given to a matter is called physical quantity.

 

[Hootenanny]

Which definition is more clear and correct ?
1)Any thing that has a measurement is called a physical quantity.
2)Characteristics that can be given to a matter is called physical quantity.

I would say that neither are correct. A physical quantity can not only be measured, but also calculated. And a photon is not matter, but has several physical quantities.

 

[johncena]

What about this one ?
Any thing that has a measurement and can be expressed in the form of a number is called physical quantity.

 

[Fightfish]

Eh, in my opinion, both are highly unclear and imprecise definitions...though I'll pick 1) if I had no choice. A physical quantity would be a physical property that, as its name suggests, is quantifiable. "Anything" is a terribly vague term, as is "measurement".
As for 2), "Characteristics" is too broad and sweeping a term - colour for example is most definitely not a physical quantity.

 

[Hootenanny]

What about this one ?
Any thing that has a measurement and can be expressed in the form of a number is called physical quantity.

Again, what about calculating a physical quantity? And you need to define 'measurement', before you can use it.

 

[johncena]

a photon is not matter, but has several physical quantities.

Why photon is not considered as matter?

 

[Mechdude]

Why photon is not considered as matter?

well its more accurate to consider it as a packet of energy, keeping in mind matter can be turned to energy and vice versa , i think 'physical' itself should be defined , maybe even some criteria to differentiate physical from non-physical.