A 6.00cm diameter sphere with a mass of 89.3 g is neutrally buoyant (static and suspended) in a liquid. What's the liquid? Approach: Write the sum of forces in the y direction and set it equal to zero. Solve for the density of the liquid. 89.3 g liquid 6 cm Se Buoyant Force: F₁ = Pevs g 140 = = Buoyant Force Gravitational Force Pé Vs д density of liquid Volume of Sphere = gravitational constant 9.8 m/s^2 weight of the liquid displaced by the volume of the suspended object. upward force on an object in a fluid and is equal to the weight of the liquid displaced by the volume. orce equation from an FBD and solve for density. TABLE 15.1 Densities of fluids at standard temperature (0°C) and pressure (1 atm) Substance p (kg/m³) 1.28 Air Ethyl alcohol Gasoline Glycerin Helium gas Mercury Oil (typical) Seawater Water 790 680 1260 0.18 13,600 900 1030 1000
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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