Consider a helium-filled airship modeled as an ellipsoid of length = 152 m and a circular cross-section with a maximum diameter = 40 m. Consider a airship flying at a velocity of 25 m/s at a standard altitude of 1000 m (look up the corresponding density in Appendix D). The airship is at a small angle of attack such that its lift coefficient is 0.07 (based on the maximum cross- sectional area). If the airship is flying in straight-and-level flight with no acceleration and has a mass of 120,000 kg, how much cargo is it carrying? (Answer to two decimal places) The total cargo that the airship is carrying is metric tonnes.
Fluid Pressure
The term fluid pressure is coined as, the measurement of the force per unit area of a given surface of a closed container. It is a branch of physics that helps to study the properties of fluid under various conditions of force.
Gauge Pressure
Pressure is the physical force acting per unit area on a body; the applied force is perpendicular to the surface of the object per unit area. The air around us at sea level exerts a pressure (atmospheric pressure) of about 14.7 psi but this doesn’t seem to bother anyone as the bodily fluids are constantly pushing outwards with the same force but if one swims down into the ocean a few feet below the surface one can notice the difference, there is increased pressure on the eardrum, this is due to an increase in hydrostatic pressure.
Density at 1000m is 1.1117 kg/m^3
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