Question

How many significant figures are there in a length measurement of:
2.5cm
5.32cm
7.180cm
0.042cm

Answer 1

Answer:

• 2.5 -No.of s.f= 2

(since,all non zero digits are significant)

• 5.32 -No.of s.f=3

(all non zero digits are significant)

• 7.180 - No.of s.f=4

(trailing zeros after decimal point are significant)

• 0.042 - No.of s.f=2

(only trailing zeros after decimal point are significant)