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Q. Explain about Noise absorptive materials?
The fundamental mechanism of noise absorptive material is to change the acoustic energy into heat energy. Amount of heat produced is generally very small because of the limited energy in sound waves (for example less than 0.01watts).
Define friction
Question Why do BS8007 specify permissible crack width of water retaining structure as 0.2mm for severe, extremely severe exposure? Answer For break width less than
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the propane gas tank has an inner diameter of 1500mm and wall thickness of 15mm. If the wall is pressurized to 2MPa, determine the absolute maximum shear stress in the wall of tank
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