While driving down the highway you notice that your speedometer reads 50 miles/hr and 80 km/hr. Which is faster, one mile per hour or one kilometer per hour?   a. one kilometer per hour     b. one mile per hour

5.1-3. Frictional Loss in Straight Pipe and the Effect of a Type of Pipe. A liquid having a density of 801 kg/m³ and a viscosity of 1.49 × 10-3 Pa s is flowing through a horizontal straight pipe at a velocity of 4.57 m/s. The commercial steel pipe is 14-in. nominal pipe size, Schedule 40. For a length of pipe of 61 m, do as follows: a. Calculate the friction loss Ff. b. For a smooth tube of the same inside diameter, calculate the friction loss. What is the percent reduction of Ff for the smooth tube?

A fluid is flowing with a mass flow rate om in a smooth horizontal pipe of length L and diameter D as the result of a pressure difference P.-PL. The flow is known to be turbulent. The pipe is to be replaced by one of diameter D/2 but with the same length. The same fluid is to be pumped at the same mass flow rate om. Calculate the pressure difference that will be needed to achieve this flow rate.

A thunderstorm is brewing in the distance. Upon seeing a flash of lightning you begin counting the seconds until you hear the thunder and notice that it took 5 seconds for the sound of thunder to reach you. Assuming the speed of sound in air to be 340m/s , how far away was the lightning strike?   a. 5 miles     b. 2 miles     c. 10 miles     d. 1 mile

Water is flowing at 0.020 m/s at steady-state through a reducing 90-degree bend in the horizontal (r-y) plane. The diameters at the inlet and outlet are 0.050m and 0.030m, respectively, and the pressure at the outlet is 1.0 atm absolute. Neglect frictional forces. Calculate the components of the force in the x-y plane to hold the pipe bend stationary. Also, determine the magnitude and direction of the force in the horizontal plane. 1,a um abs Q= 0,0Z mYs Vに = lo.19n/s Ai Vaこ A = 2 8.29m/s P=atn G use Brenmly to Sulve For P.) one

fluid flow between parallel plates (Fig. 2) that are horizontal and a distance 2h apart. A constant pressure gradient is applied in the x-direction (dp/dx). The flow is fully developed laminar and steady. The plate width is denoted by B a) Simplify the governing equations b) Define the boundary conditions c) Determine the velocity profile d) Develop an expression for the flow rate Continuity Equation ap d + at əx Momentum Equations d'u dr P8x P8y P8z ə a (pu) + (pv) + (pw) = 0 dy əz др Əx + μ әр + м ду ap + M əz d²v dx² + azu dy d²v dy² + + d²u az² ²v əz² a²w dz² azw dzw + + ay² dx² www. p P ди Ət dv at aw at + u + u + u ди ax dv əx dw ax y + v + v g Fixed Fig. 2: Flow between parallel plates with a co- pressure gradient ди + v ду dv ду + w aw ду + W ди az dv + w əz dw u(y) əz #max 介介