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A spherical tank of diameter 1 . 2 m and wall thickness 5 0 mm contains compressed air at a pressure of 1 7 MPa.

A spherical tank of diameter

1.2

m and wall thickness

50

mm contains compressed air at a pressure of

17

MPa. What is the value of tensile stress?

(

Assume E

= 210

GPa, v

= 0.29)

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