9 - Is this a test answer or do you just want to know for a project you're doing? Take a look at NEC chapter 9 - tables 4 and 5 (in the 2005 edition at least)
9
29
12
Two quarters of an inch are in a half inch.
Half inch is equal to 12.7mm
there are 1.27 cm in half an inch 1.27cm
According to the 2005 NEC Annex C, table C.1 you are allowed nine #12 THHN conductors in a 1/2" trade size EMT conduit. If your conduit run is any length at all, you would be wise to increase the conduit size to 3/4". as pulling 9 #12's for any length in 1/2" EMT is very difficult.
there are 1\24 of a foot in a half an inchthere are 1\2 of an inch in a half an inch
Two of them
1/2 inch is 1.27 cm
There are eight eighths in one inch. Therefore, in half an inch, there would be four eighths.
There are 12.7 millimeters in half an inch.