If air at a temperature of 100°f flows through a smooth, circular duct of 8-inch diameter with a volumetric flow rate of 10.5 ft3 /s, calculate the pressure drop (δp = pin – pout) that occurs over a 15-ft length of the duct. give the answer in psi.

Acar traveling at a constant speed of 22.0 m/s passes a trooper hidden behind a billboard. one second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.50 m/s2. how long does it take the trooper to overtake the speeding car? solve this problem by a graphical method. on the same graph, plot position versus time for the car and the trooper.