Assume you are a scuba diver preparing for a 30m dive into sea water of density 1025 kg/m3
a) if the denisty of air at sea level is 1.3kg/m cube, calculate the pressure difference in Pa and in mmHg between the bottom and top of your seaside hotel which is 30 m tall.
b) what are the gauge and absolute pressures in Pa you experience at a depth of 30 m in the sea?