Constants in the sense you mean are different to mathematical constants. They usually refer to a system in which two values are proportionate and so are of the units associated with the system.
No, not all do. The proportionality constants that change the units will have units themselves.
All numbers are constants.
A constant is a value that never changes
A constant in an experiment is the object or value that does not change through out the experiment.
Numeric constants have the capacity to store numeric value.
No, not all do. The proportionality constants that change the units will have units themselves.
Constants.
The constant is 2.
I only know of two constants in the universe. One is time which is an invariable constant and change which is a variable constant.
All numbers are constants.
Integer constants Character constants Real/floating point constants String constants
A symbolic constant is a constant with a name, numeric constants are unnamed and must be retyped in the code on each usage. Generally use of symbolic constants is preferred as it makes the code self documenting and allows the compiler to catch typing errors in constant usage.
A constant is a value that never changes
Constant is the speed of light and as the speed of light cannot change it is 'constant'
Certain numbers like Pi and e and Euler's constant are know as math constants. A constant is a quantity assumed to have a fixed value in math. There are many constants, the ones I mentioned are only a few of the most famous ones.
Since volume is an extensive property, there is no particular constant associated with it - indeed, by virtue of being an extensive property, it is not constant unless the mass, temperature, pressure, phase, and composition remain constant. There are, of course, conversion factors between different volume units - and the conversion factors are constants.
Mathematical constants are always single-valued. That is what is constant about them. Examples are pi and e. Physical constants could have values that change due to variable conditions.