I can understand the pressure increase below,but why did pressure decrease above as more bricks were added?
Image source: https://www.youtube.com/watch?v=4REdJIW6-Kg
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Sign up to join this communityI can understand the pressure increase below,but why did pressure decrease above as more bricks were added?
Image source: https://www.youtube.com/watch?v=4REdJIW6-Kg
Because as the piston was moved down by the mass of the bricks the volume above the piston was increased.
With the valve closed then the fluid expanded to still fill that increased volume and the pressure decreases.