Question

Convert into meter :

(I) 7 nm (diameter of small virus )

(II) 40 Em(thickness of milky way galaxy)

(III) 1.4Gm(diameter of sun)

Answer 1

(I) 7nm= 7nm/nm× 10 -9 m=7×10-9 m.

(II) 40Em= 40×1018m=4×1019m. (Note E= Exa, 1E= 1018)

(III) 1.4Gm= 1.4×109 m.