Question

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(3) Derive the relation between Joule and ergs.
14 How is the size of an atom indicated? Which​

Answer 1

Answer:

(3)

Joule is the SI unit of energy while erg is the cgs unit of energy.

1 Joule of Energy = 1 Newton x 1 metre

1 erg= 1 dyne x 1 cm

1 joule= 1 newton x 1 metre=105 dynes x 102 cm=107 erg

1 J = 107 erg

Therefore, 1 Joule is equal to 107 erg.

14)

The atomic size depends on the number of shells. An increase in the number of shells increases the size of an atom because the distance between the outermost shell and the nucleus increases.