Hippos spend much of their lives in water, but amazingly, they don’t swim. They have, like manatees, very little body fat. The density of a hippo’s body is approximately 1030 kg/m3, so it sinks to the bottom of the freshwater lakes and rivers it frequents— and then it simply walks on the bottom. A 1500 kghippo is completely submerged, standing on the bottom of a lake. What is the approximate value of the upward normal force on the hippo?
Viscosity
The measure of the resistance of a fluid to flow is known as viscosity. Most fluids have some resistance to motion, the resistance provided by the fluid is called viscosity. This resistance is created by the force of attraction between the fluid molecules. If you pour water through a funnel, it flows easily and quickly, because it has very little resistance. But if you pour honey through a funnel, it may take a little time longer, as the density of honey is high.
Poiseuille's Law
The law of Poiseuille or Poiseuille's equation states that the pressure drop of an incompressible fluid especially a liquid in a laminar flow that passes through a cylindrical tube of length L, radius r, pressure gradient ΔP, and mainly depends on the viscosity of the fluid is nothing but the pressure difference of the layers of fluids. ΔP=P1-P2
Drag Forces
Forces that occur due to the movement of fluid are known as fluid mechanics. Following are the fluids present:
Hippos spend much of their lives in water, but amazingly, they don’t swim. They have, like manatees, very little body fat. The density of a hippo’s body is approximately 1030 kg/m3, so it sinks to the bottom of the freshwater lakes and rivers it frequents— and then it simply walks on the bottom. A 1500 kg
hippo is completely submerged, standing on the bottom of a lake. What is the approximate value of the upward normal force on the hippo?
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