3. Express the number appearing in the following statements in standard form. (i) 1 micron is equal to 1 1000000 m. (ii) Charge of an electron is 0.000,000,000,000,000,000,16 coulomb. (iii) Size of a bacteria is 0.0000005 m (iv) Size of a plant cell is 0.00001275 m (v) Thickness of a thick paper is 0.07 mm
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Solution:
(i) 1 micron is equal to 1/1000000 m.
1/1000000
=1×10^-6
(ii) Charge of an electron is 0.000, 000, 000, 000, 000, 000, 16 coulomb.
0.000, 000, 000, 000, 000, 000, 16
=1.6 ×10^-19
(iii) Size of bacteria is 0.0000005 m
=0.0000005
=5 ×10^-7
(iv) Size of a plant cell is 0.00001275 m
= 0.00001275
=1.275 ×10^-5
(v) Thickness of a thick paper is 0.07 mm
=0.07
=7×10^-2
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