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A spring balance reads $W_{1}$ when a ball is suspended from it. A weighing machine reads $W_{2}$ when a tank of liquid is kept on it. When he ball is immersed in the liquid, the spring balance reads $W_{3}$ and the weighing machine reads $W_{4}$ . Then, which of the following are not correct

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W_{1} < W_{3}

W_{2} > W_{4}

W_{1} < W_{3}

W_{2} < W_{4}

answer is A, B, D.

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Detailed Solution

w_{1} and w_{2}

are the forces exerted by the ball and the spring balance on each other before and after immersion

W_{2} {,W}_{4}

are the forms exerted by the tank and the weighing machine on each other before and after immersion.

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Let m and M be masses of the ball and the tank respectively and let N be the force of interaction between the ball and the liquid in the tank

$W_{1} = mg, W_{2} = Mg$

$W_{3} = N - mg, W_{4} = N + mg$

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