![20. Calculate the pressure at a height of 8000 m<br>above sea-level if the atmospheric pressure is<br>101.3 kN/m and temperature is 15°C at the<br>sea-level assuming (i) air is incompressible,<br>(ii) pressure variation follows adiabatic law, and<br>(iii) pressure variation follows isothermal law.<br>Take the density of air at the sea-level equal to<br>1.285 kg/m'. Neglect variation of g with altitude.<br>[Ans. (i) 607.5 N/m², (ii) 31.5 kN/m²<br>(üi) 37.45 kN/m² ]<br>Oil<br>(S= 0.96)<br>Liquid<br>(S- 1.6)<br>Liquid<br>(S= 1.6)<br>Fig. 2.52<br>](https://s3.us-east-1.amazonaws.com/storage.unifolks.com/qimg-008/008_7v5szp0-pt2a4z3d.jpeg)
Extracted text: 20. Calculate the pressure at a height of 8000 m above sea-level if the atmospheric pressure is 101.3 kN/m and temperature is 15°C at the sea-level assuming (i) air is incompressible, (ii) pressure variation follows adiabatic law, and (iii) pressure variation follows isothermal law. Take the density of air at the sea-level equal to 1.285 kg/m'. Neglect variation of g with altitude. [Ans. (i) 607.5 N/m², (ii) 31.5 kN/m² (üi) 37.45 kN/m² ] Oil (S= 0.96) Liquid (S- 1.6) Liquid (S= 1.6) Fig. 2.52