thank you for answering but i wonder that if velocity changed, then kinetic energy needs to change why did you ignore kinetic energy value(1/2*v^2) in bernoulli equation? what was the assumption to address that conclusion?

Question Gas of 800 psia and 20 C flows at a flow rate of 15 m/s in a cylindrical tube with an inner diameter of 60 cm. This tube was connected to another tube with a diameter of 1m and changed to 500 psia and 20 C. What is the flow rate [m/s] of city gas in the connected pipe? (However, suppose the gas is an abnormal gas.) 1 5.4 2 8.6 3 144 Show full question Answers C Chemical Engineering expert Option 4). 24 Because reducing Bernoulli equation will get as P1V1 =P2V2 So 800x15 = 500xV 12000-500= V V=24m/s