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# problem_pdf - liquid is 30 4 cm and the liquid’s density...

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min (mm64262) – Homework 7 – lee – (GEDB00864) 1 This print-out should have 4 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0points The small piston of a hydraulic lift has a cross-sectional area of 8 . 1 cm 2 and the large piston has an area of 63 cm 2 , as in the figure below. F 8 . 1 cm 2 area 63 cm 2 What force F must be applied to the small piston to maintain the load of 89 kN at a constant elevation? Answer in units of N. 002 10.0points A water tank with a valve at the bottom is shown. Assume the cross-sectional area at A is very large compared with that at B, and the acceleration of gravity is 9 . 81 m / s 2 . value A B 8 . 9 m 5 . 9 m 45 Δ y max If this valve is opened, what is the maxi- mum height Δ y max (above the opening of the spigot) attained by the water stream coming out of the discharge spigot (at B)? Answer in units of m. 003 10.0points The air pressure above the liquid in figure is 0 . 982 atm . The depth of the air bubble in the
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Unformatted text preview: liquid is 30 . 4 cm and the liquid’s density is 804 kg / m 3 . 30 . 4 cm air air Determine the air pressure in the bubble suspended in the liquid. The acceleration oF gravity is 9 . 8 m / s 2 . Answer in units oF Pa. 004 10.0 points A heavy liquid with a density 9 . 4 g / cm 3 is poured into a U-tube as shown in the leFt-hand fgure below. The leFt-hand arm oF the tube has a cross-sectional area oF 13 . 7 cm 2 , and the right-hand arm has a cross-sectional area oF 5 . 95 cm 2 . A quantity oF 102 g oF a light liquid with a density 1 . 7 g / cm 3 is then poured into the right-hand arm as shown in the right-hand fgure. h 1 h 2 13 . 7 cm 2 5 . 95 cm 2 heavy liquid 9 . 4 g / cm 3 L 13 . 7 cm 2 5 . 95 cm 2 light liquid 1 . 7 g / cm 3 IF the density oF the heavy liquid is 9 . 4 g / cm 3 , by what height h 1 does the heavy liquid rise in the leFt arm? Answer in units oF cm....
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