1.Helium(15 degrees celsius, 1atm) will be transported in a straight horizontal copper tube over a distance of 150 m at a rate of 0.1 m^3/s. If the pressure drop in the tube should exceed 6 in h20, what is the minimum pipe diameter? ( first classify the problem as case 1, 2 , or 3)
2.A bowstring produces a force against a 2.0 oz arrow given by where a = 40 lbf, b = 3.2 ft-1 and x is in ft. x = 0 when the arrow is pulled fully back and increases as the arrow moves forward. Determine the speed of the arrow after traveling from rest at x = 0 to x = 1.6 ft.