An empty weather balloon of mass M is filled with helium gas until its volume is V. The density of air and helium is e and pA respectively. When the balloon is released in air, in terms of M, V, Pa and A, determine i) the buoyant force acting on the balloon. i) the net force acting on the balloon. i) the additional mass that can be supported by the balloon when it is in equilibrium, if M = 200 kg, V= 300 m³, p, = 1.20 kg/m³, and p = 0.180 kg/m³.
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.
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