Some pressure concepts i don't understand

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The discussion revolves around understanding pressure concepts related to seawater and air. The pressure at 10 meters below the ocean's surface is approximately 2.00×10^5 Pa, which leads to evaluating the weight of seawater and air columns. Participants are prompted to identify which statement about the weight of seawater, air, and their densities is correct. The conversation emphasizes the importance of defining pressure to clarify the correct answer. Ultimately, the focus is on understanding the relationship between pressure, weight, and density in fluid mechanics.
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Homework Statement



The pressure at 10 m below the surface of the ocean is about 2.00×10^5 Pa.

Which of the following statements is true?

a. The weight of a column of seawater 1 m^2 in cross section and 10 m high is about 2.00×10^5 N.
b. The weight of a column of seawater 1 m^2 in cross section and 10 m high plus the weight of a column of air with the same cross section extending up to the top of the atmosphere is about 2.00×10^5 N.
c. The weight of 1 m^3 of seawater at 10 m below the surface of the ocean is about 2.00×10^5 N.
d. The density of seawater is about 2.00×10^5 times the density of air at sea level.

I may sound a bit greedy but if you can please explain why it is that and why others aren't right
 
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Welcome to PF!

Hi benedict9999! Welcome to PF! :smile:
benedict9999 said:
I may sound a bit greedy but if you can please explain why it is that and why others aren't right

No, you first! :wink:

Tell us which one you think it is, and why. :smile:

( Start with the definition of pressure )
 

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