The pressure P of a gas at a constant temperature varies inversely as the volume V. If the volume is 450 in3 when the pressure is 30 lb/in2, find the pressure when the volume is 750 in3.

Answer 1

Inverse relation between P and V means that

P₁V₁ = P₂V₂ ⇒

P₂ = P₁V₁ / V₂

Plug in

P₁ = 30 lb/in²

V₁ = 450 in³

V₂ = 750 in³

and get P₂ in lb/in².