Mass is costant and can not be altered. It represents quantity of matter in an object.
We would have a much better chance of dealing with the question, possibly even to the point of proposing a reasonable answer, if we knew what 'theta' represents.
Length. The longer the vector arrow, the bigger the quantity it represents.
It is a "scalar quantity", it refers to a quantity that has magnitude but no direction, as distinct from a vector quantity
Which of the following is a vector quantity
Yes, a value can represent a quantity or amount.
All the atoms in the visible universe - about 10E85 grams.
a variable
x= the unknown
$75
velocity.
It represents a fixed quantity.
The number which best represents it is 265.15
veribal
The quantity designated by the letter "c" is the speed of light
I believe it is because Q represents quantity
A variable is usually used for that - for example, a single letter that represents the unknown quantity.