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The diagram shows a safety valve which releases steam when the pressure rises above a pre-determined value. The mass of the rod and the valve cover are negligible.

The diagram shows a safety valve which releases steam when the pressure rises above a pre-determined value. The mass of the rod and the valve cover are negligible.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Answer A45 b(i), (ii) & (iii)

A45 (a) State the conditions for equilibrium for a body which is acted upon by a system of coplanar forces. (b) The diagram shows a safety valve which releases steam when the pressure rises above a pre-determined value. The mass of the rod and the valve cover are negligible. 5.0 cm 50 cm Fivot" Valve Rod cover 5.0kg Steam preusure vessel (i) Sketch a diagram showing the forces acting on the rod when there is normal atmospheric pressure in the steam vessel. (ii) Determine the magnitude of the force at the valve which just opens the valve. (ii) The outlet has a cross-sectional area of 2.0 cm. Using the force calcu- lated in (b)(ii) determine the excess pressure above atmospheric pres- sure in the vessel when the valye just opens. Give your answer in pascals (Pa). [АЕВ, "90]
Transcribed Image Text:A45 (a) State the conditions for equilibrium for a body which is acted upon by a system of coplanar forces. (b) The diagram shows a safety valve which releases steam when the pressure rises above a pre-determined value. The mass of the rod and the valve cover are negligible. 5.0 cm 50 cm Fivot" Valve Rod cover 5.0kg Steam preusure vessel (i) Sketch a diagram showing the forces acting on the rod when there is normal atmospheric pressure in the steam vessel. (ii) Determine the magnitude of the force at the valve which just opens the valve. (ii) The outlet has a cross-sectional area of 2.0 cm. Using the force calcu- lated in (b)(ii) determine the excess pressure above atmospheric pres- sure in the vessel when the valye just opens. Give your answer in pascals (Pa). [АЕВ, "90]
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