guest wrote:What do all conversion factors have in common?
moe wrote:all conversion factors contain a "factor-of-one",
which when multiplied by a number with its unit
will convert one measuement to a number and a different unit
each factor-of-one has a number and at least two units
for example a question like: how many metres are in one inch
will look like this in symbol form:
2 inch = ? metres
the symbols for inches could be in, inch, inches or " ... there is no standard
since 1 in = 0.0254 m
the factor-of-one will be
0.0254 m/in
to convert 2 inches to metres in symbols:
1 in * 0.0254 m/in = 0.0254 m
notice that the inches cancel nicely and one is left with metres
there are few sites which do this math properly ... most just multiply by some number and the units just appear ... but this is poor math and also does not teach the learner how to go on and do other related question. this poor math method is employed in schools by teachers that are poorly prepared in this simple math skill