JDer8745 wrote:

snip


UNITS: 10-pF capacitor. 10-pF is hypenated when used as a modifier, i. e.,
adjective.

Others: 10-ft pole, 5-cent cigar, 2-dollar pistol, 12-V battery, 500-mile
track.

73 de Jack, K9CUN


Partly correct.

The use of "10-picofarad capacitor" is preferred under the standard rules of
English and the NIST style guide. The use of "10-pF capacitor" should be
replaced by "10 pF capacitor" according to NIST.

See section 7.2 in http://www.physics.nist.gov/Pubs/SP811/contents.html

"Even when the value of a quantity is used in an adjectival sense, a space is
left between the numerical value and the unit symbol. (This rule recognizes that
unit symbols are not like ordinary words or abbreviations but are mathematical
entities, and that the value of a quantity should be expressed in a way that is
as independent of language as possible.)"

"When unit names are spelled out, the normal rules of English apply. Thus, for
example, ‘a roll of 35-millimeter film’ is acceptable."

73,
Gene
W4SZ