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Pressure cookers have been around for more than 300 years, although the early ones had a nasty habit of exploding. How much force must the latches holding the lid onto a pressure cooker be able to withstand if the circular lid is 20.0 cm in diameter and the gauge pressure inside is 3.10 atm? Neglect the weight of the lid.
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Added Mon, 20 Jul '15
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Force = Pressure * Area

P = 3.10 atm = 314108 Pa

A = pi / 4 * 0.2^2

= 0..0314 m^2

So, Force = P * A

= 9868 N

= 9.868 kN

Edit
Added Mon, 20 Jul '15
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