Determine with what force the atmospheric air presses on the surface of a notebook measuring 20 cm * 25 cm. Normal atmospheric pressure is 760 mm Hg. Art. The density of mercury is 13600 kg / m3
Atmospheric pressure 760 mm Hg is normal and equal to 10 ^ 5 Pa
Notebook area S = a * b = 0.2m * 0.25m = 0.05m ^ 2
P = F / s, hence F = P * S = 100000 * 0.05 = 5000N
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