What sort of objects does this refer to?
volts is the unit of votage while watts is the unit of power
In satin weave construction, the letter D stands for the word denier. Denier is a unit of weight which measures the density of the fibers.
The ratio between two different quantities is the rate.Usually, the second unit is a measure of time.
Volt
different between centimeter square centimeter is that cm is a unit of length and cm square is used for measuring area
Volts
an unknown quantity represented by a letter
You can't convert between units that measure different kinds of things. A meter is a unit of length, a kilogram is a unit of mass.
These are two different units. A square foot is a unit of area, and a cubic foot is a unit of volume. You cannot convert between them.
There is no universal conversion between the two. A gram is a unit of mass; a quart is a unit of volume, so they really measure different things.
Gram is a unit of mass. Kilometer is a unit of distance. You cannot convert between these two dimensions.