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.

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

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.

2) The following data was recorded from viscosity experiment: The recorded distance of falling ball = 100 cm and time 1.08 s. The density of oil (pL) = 826 kg/m' and the density of steel (ps) = 7810 kg/m', kinematic viscosity (v) = 0.000124 m'/s, g-9.81 m/s. The dynamic viscosity for the oil: A. 0.175 kPa.s B. 0.175 Pa.s C. 0.102 kPa.s D. 0.102 Pa.s E. None of the choices

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

Situation 3: A calibrated test of a 0.00785 m² circular sharp-edge orifice in a vertical side of a large tank showed a discharge of 22,300 N of water in 1 minute and 40 seconds at a constant head of 1.20 m. Measurement of the jet showed that it traveled 1.92 m horizontally while dropping 0.8 m. 6. Determine the coefficient of discharge. a) 0.621 b) 0.597 c) 0.649 d) 0.721 7. Determine the coefficient of velocity. a) 0.84 b) 0.93 c) 0.74 d) 0.98 8. Determine the coefficient of contraction. a) 0.77 b) 0.97 c) 0.61 d) 0.67 B

A pipe has an outer diameter of 26 mm and an inner diameter of 19 mm. What is the polar moment of inertia "J" for the shaft in mm^4? Type your answer...

Given the two-dimensional velocity field V = 2 xi+ 5 yj, where x is in cm, and V is in cm/s, what is the volumetric strain rate? O751 4 (cm-s)-1 x 4 (cm-s)-1 x+ 25 (cm-s)*1 y O 14 (cm-s)1 x QUESTION 8 If a steady flow of water enters a nozzle with an entry diameter of 8 cm at a speed of 20 cm/s, and leaves the nozzle with a speed of 120 cm/s, what is the exit diameter of the nozzle? 3.27 сm 1.33 cm 0.75 cm 1.84 cm 10.7 cm

Question (2): Determine the head in the region between the two materials and the discharge in cm³/sec for the following sketch. Y Area=34 cm² K=0.03 cm/sec H Area=34 cm² K=0.004 cm/sec

ΕΧΑMPLΕ2 A body of 12 mm diameter is tested and the following results are noted. gauge length =200mm, load =20 kN. , change in length =0.2mm, change in diameter at proportional limit = 0.0025 mm. Calculate the value of poison's ratio and young's. modulus. Given data; - D=12 mm. L= 200mm. P= 20 k N AD = 0.0025 mm AL= 0.2mm 1-и?? 2- E??