Physical quantities/ magnitudes

[Gruxg]

I've seen that in English you refer to the measurable physical properties as http://en.wikipedia.org/wiki/Physical_quantity" , but some sites call them "physical magnitudes". Are both of them correct?. Do you consider them as synonyms?

In Spanish we say "magnitudes físicas", and I wonder if "physical magnitudes" is a bad translation from Spanish.

Thanks in advance!

 

[mathman]

In general "quantity" is a more general term, while "magnitude" is more specific. Example, one property of an object is that is has a mass (quantity) - specifying it is 10 kilos defines the magnitude.