A strain gage is installed in the longitudinal direction on the surface of an aluminum beverage can (see figure). The radius-to-thickness ratio of the can is 200. When the lid of the can is popped open, the strain changes by 0= 170 × 10-6.
What was the internal pressure p in the can? (Assume E = 10 ×106 psi and 0.33.)
![970_6eda9505-fa57-4f2b-9f00-8f5a573f182d.png](https://secure.tutorsglobe.com/CMSImages/970_6eda9505-fa57-4f2b-9f00-8f5a573f182d.png)