They denote different fractions of the inch. A good engineers ruler will have 64 ths, 32 nds 16 ths and 8 ths at least.
The "tiny lines" that make up an inch on a ruler are centimeters.
On a typical inch ruler the smallest lines are 1/16th dimensions. The next biggest are 1/8th", then 1/4", and finally 1/2".
DOODOO
Typically the smallest lines are a sixteenth of an inch apart. Some rulers may show thirty-seconds or sixty-fourths of an inch.
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The "tiny lines" that make up an inch on a ruler are centimeters.
On a typical inch ruler the smallest lines are 1/16th dimensions. The next biggest are 1/8th", then 1/4", and finally 1/2".
DOODOO
Typically the smallest lines are a sixteenth of an inch apart. Some rulers may show thirty-seconds or sixty-fourths of an inch.
This site has software for you- sawmillsoftware.com
In an inch, there are 16 lines. It should be the 12th line. From line 0 to line 12 is 3/4 an inch.
The center of gravity on a plastic ruler would typically be located at the midpoint, which is where the ruler balances evenly when placed on a narrow edge or fulcrum. This point is usually at the 15 cm mark on a 30 cm ruler or at the 6 inch mark on a 12 inch ruler.
It depends: 8, 10, 16, 32 and, in precision rulers, 64.
A standard metric ruler is just slightly longer than 30 centimetres and slightly longer than 12 inches.The "slightly longer" is for the extra bits of ruler that stick out in front of the 0 (zero) cm/in at the beginning of the ruler and behind the 30 cm/12 in mark at the end of the ruler
inch ruler
On a standard ruler, 5.75 inches is located between the 5-inch and 6-inch marks. Specifically, it is three-quarters of the way past the 5-inch mark. You can find it by counting three small lines (each representing 1/8 inch) past the 5-inch mark, which will lead you to the 5.75-inch mark.
Different rulers will have different increments, so we can't give a definitive answer - however - I would expect the ruler to at least mark off the centimeters with larger lines and then probably use smaller lines as millimeter increments. Some rulers could use even smaller increments such as half millimeters but I've never personally seen any rulers that went for tenths of a millimeter. When I need to get to that kind of precision I always opt for a different measuring tool such as a micrometer.