A porthole on a vertical side of a submarine (submerged in seawater) is 
square 
. Find the fluid force on the porthole, assuming that the center of the square is 
feet below the surface.
Definitions:
Independent Variable
The variable in an experiment that is manipulated or changed by the researcher to observe its effect on the dependent variable.
Manipulated
Being controlled or influenced in an unfair or deceitful way, often without awareness of the manipulation.
Research Question
A precise, clearly stated question that outlines the problem or area of interest to be investigated through research.
Hypothesis
A preliminary hypothesis formed on the grounds of scant evidence, aimed at facilitating further investigative work.
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