Of the numbers 0.0034 m, 45.6 m, and 1234 m, which is the most precise?
0.0034 m
45.6 m
1234 m
none

The most precise is 0.0034 m ⇒ 1st answer

Explanation:

Lets revise the meaning of precise

Precision is referred as the closeness of two measurements to one

another.

Highest number with significant digit is the most precise

Ex: Highest significant of optical instrument is the Wavelength of visible (red)

light = 0.00006 cm

Hence the most precise device for measuring length is the given optical

instrument

The difference between accuracy and precise

Accuracy is how close a value is to its true value

Precision is how repeatable a measurement is

We have three numbers

0.0034 m, 45.6 m, and 1234 m

The least precise is 1234 m

The most precise is 0.0034 m

the first, second, and fifth options

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me