1.A smooth nozzle with a tip diameter of 2 inches terminates a 6 in waterline. Calculate the mean velocity of efflux from the nozzle when the velocity in the line is 10 ft/s.
2.A student trying to test the braking ability of his car, determined that he needed 15 m more to stop his car downhill on a particular road than uphill when driving at 90 km/h. Assuming that the coefficient of friction between the tires and the pavement is 0.30, determine the braking distance downhill and the percent grade of the highway at that section of the road.