
(a) 20 ergs
(b) 60 ergs
(c) 70 ergs
(d) 700 ergs
Answer: a
(21)
5/5 - (2 votes)

(a) 20 ergs
(b) 60 ergs
(c) 70 ergs
(d) 700 ergs
Answer: a
(21)
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