How many meters is 12 nanometers?
1nm = 10 ^ (- 9)
12 nm = 12 * 10 ^ (- 9) M = 1.2 * 10 ^ (- 8) M
How many 0.1nm is equal to 1mm?
10 to the 7th power
How to measure the diameter of a hair?
If you wrap your hair around a pencil, it's not that long
Use micrometer, screw micrometer