Q5/ A hollow pressurized sphere having radius r=122 mm .and wall thickness t=10mm. is lowered into a lake (see figure). The compressed air in the tank is at a pressure of 165 kPa (gage pressure when...

Extracted text: Q5/ A hollow pressurized sphere having radius r=122 mm .and wall thickness t=10mm. is lowered into a lake (see figure). The compressed air in the tank is at a pressure of 165 kPa (gage pressure when the tank is out of the water). At what depth d will the wall of the tank be subjected to a compressive stress of 620 kPa? Answer