Problem 2 In an experiment aiming to measure the pipe roughness (ε), pressure decrease of 40 kPa was measured across a pipe length of 250 m. The straight pipe has a constant inside diameter of 0.1 m. If the velocity of water (specific weight 9810 N/m³; kinematic viscosity: 1 x 10-6 m²/s) was 1 m/s, what is the absolute roughness of this pipe material? Assume a = 1.0 throughout.

Oil flows through a circular pipe at a rate of 0.4m^3/s.  Density p= 960kg/m3  Length of Pipe = 120m Head loss along the length = 7m Roughness of the pipe, ks = 0.07mm Kinematic viscosity v= 2 x 10^(-5)  m2/s Find the diameter of the pipe to 3dp. (The final solution should be 0.34m, but i am confused with the method so if you could put a few notes next to calculations that would be very helpful). Ive attached a copy of the moody diagram aswell as it is relevant.

Ex.1 Ans. A glass tube 0.25 mm in diameter contains a mercury column with water above the mercury. The temperature is 20°C at which the surface tension of mercury in contact with water is 0.037 kg()/m. What will be the capillary depression of the mercury? Take angle of contact 0= 130°. 3.02 cm

A glass cylinder 5 cm internal diameter with a screen at the bottom is used as a falling head permeameter. The thickness of the sample is 10 cm. The water level in the tube at the start of the test was 40 cm above tail water level and it dropped by 10 cm in one minute while the level of tail water remained unchanged. Determine the value of the coefficient of permeability in mm/s. a. 5.9 x 10^-2 b. 4.8 X 10^-1 c. 2.15 x 10^-2 d. 625 X 10^-2

I hope you solve the question a fluid mechanical material

A plate is sliding down a plane at an angle of 30 ° as shown in figure 5. The plate weighs 15lb, measures 25in x 30in, and has an average velocity of 0.65ft/s. Determine the thickness of the film oil with a viscosity of 1.85x10^-2 lb-s/ft^2.

The velocity distribution for a flow over a plate is given by u = 3y^2 + 2y, where u is velocity in m/s at a distance y meter above the plate. If the dynamic viscosity is 9 poise, the shear stress at a boundary is given by?

A3 mm diameter tube is inserted into a fluid with Surface tension is 0.04 N/m, Density 1400 kg/m Wetting angle is 7°. Calculate the capillary rise.

A 0.6 m square glass plate slides on a plane with a slope of 30° from the horizontal (Figure 1.2). Knowing that the plate weighs 30 N and that it acquires a constant speed of 5 cm/s, it is asked: determine the dynamic viscosity of the film 0.1 mm lubricant, which is between the plates. Assume the velocity diagram linear in the fluid film). (R: 0.0833 Ns/m2) 5cm/s Figure 1.2 0.1 mm

Q2) Figure Q2 shows a 30-kg block is connected to block B through a frictionless pulley. The coefficient of static friction for the contact surfaces is 0.35. (i) (ii) Determine the mass value of block B when the impending motion of block A is down the plane. Determine the mass value of block B when the impending motion of block A is up the plane. 20⁰ А μs=0.35 Figure Q2 B