PHYSICS HELP

[pizza1994]

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Two fish are submerged in a T-shaped closed container. The first fish is 15 centimeters from the bottom, the second is 30 centimeters from the bottom. Compared to the second fish, the first fish experiences what change in gauge pressure?
(A) The first fish experiences half the gauge pressure.
(B) The first fish experiences twice the gauge pressure.
(C) A change in gauge pressure cannot be determined, because gauge pressure depends on the shape of the container.
(D)A change in gauge pressure cannot be determined, because gauge pressure depends on the depth of the fish.

Answer is D but WHY????

isnt "from the bottom" same as "depth"?

 

[DrknoSDN]

gauge pressure uses "from the surface" (mgy where y is how far it is from the surface)
The closed T-shaped container in this example could be any size so the bigger it is the greater the gauge pressure.

"If you are 1 foot from the bottom of a swimming pool (or lake), how deep are you underwater?"

 

[pizza1994]

gauge pressure uses "from the surface" (mgy where y is how far it is from the surface)
The closed T-shaped container in this example could be any size so the bigger it is the greater the gauge pressure.

"If you are 1 foot from the bottom of a swimming pool (or lake), how deep are you underwater?"

ahh right so surface to object is what they call depth. great! thanks 🙂