Although gas station owners lock their tanks at night, a gas station owner was the victim of theft because his employee had a key to the tank. The owner of the gas station wants to bury the gasoline so deep that no vacuum pump will be able to extract it. He has hired a general contractor to dig the holes for the tanks. What is the minimum gasoline surface depth ℎ2 needed to prevent siphoning by any pump? Assume the specific gravity of gasoline is 0.766 and that the tank is not sealed. (You can ignore the drop rate of the gasoline level inside of the tank.) The gas station owner balks at the contractor's estimate. He neither has the funds nor approval from the city to dig that deeply. However, the contractor tels him that the best a thief could hope to have at his disposal is a 192‑mbar vacuum pump. Anything better would be enormously expensive. Given this information, how deep ℎ2 would the gasoline have to sit below the surface to keep it safe from thieves? ℎ2=
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.
Although gas station owners lock their tanks at night, a gas station owner was the victim of theft because his employee had a key to the tank.
The owner of the gas station wants to bury the gasoline so deep that no vacuum pump will be able to extract it. He has hired a general contractor to dig the holes for the tanks. What is the minimum gasoline surface depth ℎ2 needed to prevent siphoning by any pump?
Assume the specific gravity of gasoline is 0.766 and that the tank is not sealed. (You can ignore the drop rate of the gasoline level inside of the tank.)
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