Question

QUESTION TWO (15 marks) A. A small chemical-industry tank fitted with a manometer as shown contains a dense fluid with specific gravity S 3.0 and 20 cm deep. Workers should have added water to a depth of 15 cm above the dense fluid. What height Ah do you expect to find when you inspect the tank? (7 marks) 15 cm Water Ah? 20 cm S 3.0 B. A sea-water aquarium is planned to have a circular window with diameter D-80 cm. Its top is h=1.2 m below the water surface and the aquarium wall is at the angle shown in the figure below What is the hydrostatic force acting on the window? Where is the Centre of Pressure? (8 marks) Window Sea water 60

Answer 1

ala 15cm wates. I for water specifice goauty sal. i5-3 20cm lw= 1000 kg/m? the about line A-4 pressure egni = egon Pwgl his effon eft denstey of fluid . = specific grauty of fluid y ew. = 3x bw (1000) (15) - 3x looo)x 45 she is a = sem Bh= 5cm Cuven D= 0.8m s=1003 h= 1.2m 0,8m L slant height slant height ý= of th no = love to se e 1985cm depth of centroid ñ= hto smo = list ort smbo = 1.546um

1. a) hydrostatic force F= egañ = (1000 X 1103) (9181) 5 (9,832)x(11546) 7853,60 hydrostatic force TF= 7,854 kn b) centre of gross use Ah Ah yeps ñt Insurance that wou ) esmo) a lesu6t che con8.4 + smo) - I (0.88² x 1,564 1.565m of 1 Centre pressure = 1.565m 1 from top of surface of water