A 4.27-m diameter cylindrical tank, open to atmosphere, is filled to a depth of 4.88 m with seawater. The pressure at the bottom of the tank is 117.21 kPa (gage) when atmospheric pressure is 775 mm Hg. What is the depth of a layer of SAE 30 oil floating on the seawater? water

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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Hello. Our instructor solved this question and subtracted the product of water's height and specific weight from the P1 pressure, as well as oil's. He didn't factor air pressure into the equation. What is the reason why we do not use open air pressure to solve the problem?

A 4.27-m diameter cylindrical tank, open to atmosphere, is filled to a depth of 4.88 m with
seawater. The pressure at the bottom of the tank is 117.21 kPa (gage) when atmospheric
pressure is 775 mm Hg. What is the depth of a layer of SAE 30 oil floating on the seawater?
oil
water
(not to scale)
a. 6.99 m
O b. 4.57 m
O c. 5.08 m
O d. 3.12 m
O e. 7.62 m
Transcribed Image Text:A 4.27-m diameter cylindrical tank, open to atmosphere, is filled to a depth of 4.88 m with seawater. The pressure at the bottom of the tank is 117.21 kPa (gage) when atmospheric pressure is 775 mm Hg. What is the depth of a layer of SAE 30 oil floating on the seawater? oil water (not to scale) a. 6.99 m O b. 4.57 m O c. 5.08 m O d. 3.12 m O e. 7.62 m
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