Alarge spherical tank (see gure) contains gas at a pressure of 420 psi. the tank is 45 ft in diameter and is constructed of high-strength steel having a yield stress in tension of 80 ksi. (a) determine the required thickness (to the nearest 1/4 inch) of the wall of the tank if a factor of safety of 3.5 with respect to yielding is required. (b) if the tank wall thickness is 2.25 in., what is the maximum permissible internal pressure?

the warning light flashes for a second or two when the engine starts. if it stays on, there's must be something wrong with the coolant. you should never dare to continue driving when the light is on. pull over as soon as possible and shut the engine off.

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the fed will purchase bonds from banks to inject money into the banking system. the banks can use these funds to provide loans to individuals and businesses.

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