Q.

Energy equal to the mass of one electron is

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a

8.2 × 10–7erg

b

9.2 × 10–8erg

c

8.2 × 10–10erg

d

4.1 × 10–8erg

answer is A.

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Detailed Solution

E = mc2E = (9.1 × 10-28g)(3 × 1010 cm/s)2E = 8.2 × 10-7 ergs.
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Energy equal to the mass of one electron is