Pressure..

[Temperature101]

At a specific depth in a swimmming pool, a barometer measures the total pressure to be twice of the atmospheric pressure. If the barometer is now submerged to a depth that is twice its initial depth, by how much does the total pressure increase?

A. 50%
B. 100%
C. 200%
D. 300%

Answer: A

I just dont get the explanation in TBR?

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[nabilesmail]

Initially total pressure = 2 atm, 1 of the atm is from atmospheric, the other is from depth ( 1 atm). Going to twice the depth= 2 atm + atmospheric= 3 atm 3/2= 150%, the pressure increases by 50% =]

 

[Temperature101]

Initially total pressure = 2 atm, 1 of the atm is from atmospheric, the other is from depth ( 1 atm). Going to twice the depth= 2 atm + atmospheric= 3 atm 3/2= 150%, the pressure increases by 50% =]

Thanks...

 

[Postictal Raiden]

Initially total pressure = 2 atm, 1 of the atm is from atmospheric, the other is from depth ( 1 atm). Going to twice the depth= 2 atm + atmospheric= 3 atm 3/2= 150%, the pressure increases by 50% =]

I thought the question was asking about the total increase in pressure from 1 atm (above the water), not from the original depth.