Question

do significant figures change if we measure a physical quantity inndifferent system of units expain with example

Answer 1

No, significant figures of a physical quantity do not change if we measure a physical quantity in a different system of units.

E.g. 3.23 inch = 8.20 cm

In both cases we see the number of significant figures is same.

A confusion may arise here

1 foot = 0.3048 meter exactly

Apparently this may mean for one significant figure for foot it resulted in 4 significant figures in meters. But this representation is erroneous because 1 meter is accurate .

Now if 1 m is written as 3 significant figures in this way

1.00 m = 0.30 ft.