Q. 44.5( 66 Votes )

Express the numbe

Answer :

(a) It is given that,

Distance between Earth and Moon = 384, 000, 000 m


Thus,


384, 000, 000 = 3.84 × 108 m


(b) It is given that,


Speed of light in vacuum = 300, 000, 000 m/s


Thus,


300, 000, 000 = 3 × 108 m/s


(c)It is given that,


Diameter of Earth = 1, 27, 56, 000 m


Thus,


1, 27, 56, 000 = 1.2756 × 107 m


(d) It is given that,


Diameter of Sun = 1, 400, 000, 000 m


Thus,


1, 400, 000, 000 = 1.4 × 109 m


(e) It is given that,


Average number of stars in galaxy = 100, 000, 000, 000 stars


Thus,


100, 000, 000, 000 = 1 × 1011 stars


(f) It is given that,


Estimated age of universal = 12, 000, 000, 000 years


Thus,


12, 000, 000, 000 = 1.2 × 1010 years


(g) It is given that,


Distance of sun from the centre of Milky Way galaxy = 300, 000, 000, 000, 000, 000, 000 m


Thus,


300, 000, 000, 000, 000, 000, 000 = 3 × 1020 m


(h) It is given that,


Total number of molecules in a drop of water weighing 1.8 gram = 60, 230, 000, 000, 000, 000, 000, 000 m


Thus,


60, 230, 000, 000, 000, 000, 000, 000 = 6.023 × 1022


(i) It is given that,


Area of sea water on earth = 1, 353, 000, 000 cubic km


Thus,


1, 353, 000, 000 = 1.353 × 109 cubic km


(j) It is given that,


Population of India in March 2001= 1, 027, 000, 000


Thus,


1, 027, 000, 000 = 1.027 × 109


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