On a ruler, .81 inches would be just slightly less than 7/8 of an inch, since 7/8 is equivalent to .875 inches. You would find .81 inches between the 3/4 inch mark (0.75) and the 7/8 inch mark (0.875). It would be approximately 13/16 of an inch, which is slightly past the three-quarters mark but not quite reaching the seventh-eighths mark.
6mm is approximately a quarter of an inch on a ruler. It is a small measurement, about the width of a pencil lead. It is typically marked as a short line on most rulers.
To find the precision on a ruler, look at the smallest division or marking on the ruler, as this indicates the precision of measurements that can be made using the ruler. For example, if the ruler is marked in millimeters and the smallest division is a millimeter, the precision is 1 millimeter.
On a standard ruler, 3.9 inches would be equivalent to 9.906 centimeters. This conversion is based on the fact that 1 inch is equal to 2.54 centimeters. Therefore, to convert inches to centimeters, you would multiply the number of inches by 2.54.
The atomic number of thallium (Tl) is 81, which represents the number of protons in the nucleus. Since thallium is a stable element, the number of protons and neutrons in its nucleus should be equal. Therefore, the number of neutrons in a thallium atom is also 81.
A 16-mark looks like a small vertical line that is slightly longer than the surrounding lines on a standard ruler. It typically falls between the 15-mark and the 17-mark on the ruler scale.
A ruler
It look like 1.93
where is .39 on a ruler
81 27,3 9,3,3 3,3,3,3
2.5 cm looks like about 1 inch on a ruler
i inch
A ruler
0.081
3,3,3,39,3,327,381
one and 1/4
1.77 inches
6.14" is the length of a U.S. Dollar bill. Measure it with your ruler.