A Rotameter through which air at room temperature and atmospheric
pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If
helium (molecular weight 4) is used and Rotameter shows the same reading,
the flow rate (cc/sec) is
(A) 26
(B) 42
(C) 269
(D) 325
pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If
helium (molecular weight 4) is used and Rotameter shows the same reading,
the flow rate (cc/sec) is
(A) 26
(B) 42
(C) 269
(D) 325