The pressure P and volume V of an expanding gas are related by the formula PV D C, where b and C are constants (this holds in adiabatic expansion, with or without loss). dP 11 kPa/min, V = 90 cm, and dV = 20 cm /min. dt 3 Find b if P = 39 kPa, dr (Use symbolic notation and fractions where needed.) b

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