65. At what temperature r.m.s. speed of air molecules doubles of that at N.T.P. is
(a) 819°C (b) 719°C
(c) 909°C (d) None of these
Answer-a
(5)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)