3. From the textbook problem 8.20 [Statement: Asphalt at 120 °F, considered to be a Newtonian fluid with a viscosity 80000 times that of water and a specific gravity of

1.09, flow through a pipe of diameter 2.0 in. If the pressure gradient is 1.6 psi/ft determine the flow rate assuming the pipe is (a) horizontal; (b) vertical with flow up.]