Pressure - more examples

examples:

• if the density of air is constant (which it isn’t), and ?air = 1.2 kg/m3, how thick is the atmosphere?
• if the density of water is constant (which it approximately is, ? = 1 gm/cm3), how deep do you have to go to add 1 atmosphere to the pressure?
• if you replace water with mercury (?=13.6 gm/cc), how deep?

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