Refers to how much you pay for a unit of energy. When talking about natural gas, 1 unit = 1 CCF. When talking about electricity, 1 unit = 1 kiloWatt.
1 unit
There really isn't much to memorize. The unit circle is a circle with a radius of 1.
1 decimeter is a unit of length and sqft is a unit of area, you can not equate the two, so your question is meaningless.
1 cc water weighs 1 gm, any other unit volume will be a multiple or fraction of that.
1 decisecond is a unit in its own right.
i think about 50p
A pfennig was 1/100 of the German unit of currency
As a unit of measurement, they're pretty much the same.
It is 1 square unit.
Not possible to compare. Mile is unit of distance, kg is unit of weight
A cent is a unit of area. A centimetre is a unit of distance. The two units are therefore incompatible.