Question

6.
Given P=0.0030m, Q=2.40m, R=3000m. Significant figures
in P, Q and R are respectively
(a) 2,2, 1 (b) 2,3,4 (c) 4,2,1 (d) 4,2,3 why all zeroes will be significant in 3000m​

Answer 1

Explanation:

if there is decimal don't count the leading 0

but

count the treling 0

P=1 significant figure

Q=3

no decimal don't count the treling 0

R=1