Question: Air is flowing in a wind tunnel at 12C and 66 kPa at a velocity of 230 m/s. The Mach number of the flow is

Air is flowing in a wind tunnel at 12°C and 66 kPa at a velocity of 230 m/s. The Mach number of the flow is
(a) 0.54 m/s
(b) 0.87 m/s
(c) 3.3 m/s
(d) 0.36 m/s
(e) 0.68 m/s

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