A spherical ball made of wood (SG=0.81) is immersed deep in a freshwater lake. The ball is 0.2-m in diameter. It accelerates upwards toward the surface and attains a terminal velocity before reaching the surface. What is its terminal rise velocity? HINT: The drag coefficient is in a range where it is constant over a wide Reynolds number range. The water temperature is 15 degrees C. Ans: v = 1.11 m/s Show how that is the answer please.
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.
A spherical ball made of wood (SG=0.81) is immersed deep in a freshwater lake. The ball is 0.2-m in diameter. It accelerates upwards toward the surface and attains a terminal velocity before reaching the surface. What is its terminal rise velocity? HINT: The drag coefficient is in a range where it is constant over a wide Reynolds number range. The water temperature is 15 degrees C.
Ans: v = 1.11 m/s
Show how that is the answer please.
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