19. The molecules of a given mass of a gas have a m.s. velocity of 200 m/sec at
27°C and 1.0×105 N/m2 pressure. When the temperature is 127°C and pressure is 0.5×105 N/m2 , the r.m.s. velocity in m/sec will be
(a) (100√2)/3 (b) (100√2)
(c) 400/ √3 (d) None of the above
Answer-c
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a