A steel penstock 500 mm in diameter has shell thickness of 10 mm. The modulus of elasticity of the shell material is 2.0 x 105 N/mm2 & the bulk modulus of elasticity of water is 2.0 x 103 N/mm2. The pipe is designed to discharge water at a mean velocity of 2.0 m/sec. Determine the pressure rise caused by the sudden closure of a valve at the downstream end by neglecting the elasticity of the obesgalagalisio pipe material.

Example 1.2 (a) A 25 mm diameter bar is subjected to an axial tensile load of 100 kN. Under the action of this load a 200 mm gauge length is found to extend 0.19 x 10-3 mm. Determine the modulus of elasticity for the bar material. (b) If, in order to reduce weight whilst keeping the external diameter constant, the bar is bored axially to produce a cylinder of uniform thickness, what is the maximum diameter of bore possible given that the maximum allowable stress is 240 MN/m2? The load can be assumed to remain constant at 100 kN. (c) What will be the change in the outside diameter of the bar under the limiting stress quoted in (b)? (E = 210 GN/m² and v = 0.3).

Consider these torsion boxes, they all have the same enclosed area A. The thickness of the skin of the torsion boxes is indicated in the figure above. Which statements are true and which statement are false? Which of the following statements are TRUE? A) All cross-sections have the same shear flow. B) All cross-sections have the same shear stress. C) The shear stress in the circular section is larger than the shear stress in the square section. D) The shear flow in the circular section is smaller than the shear flow in the square section.

Answer number 4 only. Thank you!

A hydraulic punch press is used to punch a slot in a 10-mm-thick plate, as illustrated. If the plate shears a determine the minimum force P required to punch the slot. Punch O 1051 KN O 766 kN O 649 kN O 717 KN O 979 KN Slug Plate 20 mm 75 mm Plan view of slug + a stress of 360 MPa,

please solve the following problem with step by step solutions with neat hand writing so it can be easy to understand.

A steel penstock 60 cm in diameter has a shell thickness of 1.2 cm. The modulus of elasticity of pipe shell material is 2.1 × 105 N/mm² with a Poisson's ratio of 1/4, and the volume modulus of elasticity of water is 2.1 × 103 N/mm². The pipe is designed to discharge water at mean velocity of 2.1 m/sec Determine the water hammer pressure rise caused by sudden closure of the valve at the d/s end (1) neglecting the elasticity of the pipe material; and (2) considering the elasticity of the pipe material.

Compression spring.

I need the answer as soon as possible

A 12 mm thick steel pipe with inside diameter of 600 mm conveys water under a head of 350 m. a. Calculate the tensile stress (in kN/m) in the pipe wall. b. Calculate the stress (kPa) in the pipe wall if the head is increased to 500 m of water. c. Calculate the required thickness (mm) under a head of 500 m if the allowable tensile stress of the pipe is 123 MPa and assuming that the joints are 75% efficient.