This preview has intentionally blurred sections. Sign up to view the full version.
View Full DocumentThis preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Bertrand Dano Bertrand Dano Topic#1: Fluid sciences Bertrand Dano Scuba Diving and Hydrostatic Pressure P atm Surface z P Weight of column of water: Hydrostatic pressure: P h = P atm + ρ g z = ρ A z g Pressure = W/A P = W/A = ρ g z W= m g = ρ V g Bertrand Dano • Danger of emergency ascent? P= ρ g z = 998 kg/m 3 x 9.81 m/s 2 x 30m = 293, 711 N/m 2 = 293, 711 Pa / 1.01 x 10 5 Pa/atm = 2.9 atm P h = P atm + P = 1 + 2.9 = 3.9 atm Using Boyle’s law: P atm V atm = P h V h atm h h atm P P V V = atm atm 1 9 . 3 = = 3.9 If you hold your breath on ascent, your lung volume would increase by a factor of 4, which would result in embolism and/or death. Scuba Diving and Hydrostatic Pressure • Pressure on diver at 30m (~100 ft)? Bertrand Dano Therefore, when SCUBA diving, the air in your lungs at a 10m depth has twice the pressure of air on land. At 20m, it has three times the pressure. At 30m, it has four times the pressure, and so on....
View
Full
Document
This note was uploaded on 11/15/2010 for the course PHYSICS 122 taught by Professor Bertranddano during the Winter '08 term at Shoreline.
 Winter '08
 BertrandDano
 Hydrostatic Pressure

Click to edit the document details