Question: A pressure cooker has the lid screwed on tight. A small opening with A = 5 mm2 is covered with a petcock that can be

A pressure cooker has the lid screwed on tight. A small opening with A = 5 mm2 is covered with a petcock that can be lifted to let steam escape. How much mass should the petcock have to allow boiling at 120oC with an outside atmosphere at 101.3 kPa?

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