An empty glass jar is submerged in tank of water with open mouth of...

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An empty glass jar is submerged in tank of water with open mouth of the jar
\( \mathrm{P} \) downwards, so that air inside the jar is trapped and cannot get out. As the jar is
W pushed down slowly, the magnitude of net buoyant force on the system of volume of gas trapped in the jar and on the jar :
(1) increases
(2) decreases
(3) remains same
(4) Information is insufficient to draw inference.
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