Question

[5 prs] An 8-cm-diameter piston compresses manometer oil into an inclined 7-mm-diameter tube, as shown in the figure. When a weight is added to the top of the piston, the

oil rises an additional distance of 10 cm up the tube, as shown. How large is the weight, in N? (The fluid level in the cylinder drops due to additional increase of the fluid in the tube.)

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