The length of a spring when it's at rest is measured to be 0.56 centimeter. How many significant figures are there in this measurement?

A. 3

B. 2

C. 1

D. 0

Option B - 2

Step-by-step explanation:

We have given, the length of a spring when it's at rest is measured to be 0.56 centimeter.

We have to find, how many significant figures are there in this measurement?

Solution:

The rules to get the significant figure are

Non-zero digits are always significant. Any zeros between two significant digits are significant. A final zero or trailing zeros in the decimal portion ONLY are significant.

The given measurement is 0.56 cm.

It has two trailing zeros in the decimal i. e. 5 and 6.

There are only two significant figures.

Therefore, Option B is correct.