lecture11_capacitors_energy_current_072611

Physics 122 the fluid flow model key key concept

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Unformatted text preview: low These These help us make sense of the fundamental laws that govern current flow. Physics 122 The fluid flow model Key Key concept: Pressure Recall: Recall: 1 2 3 4 – Pressure is like a tension but in 3D. – It pushes in all directions at once, so it has no direction. – Forces due to pressure occur when you only let it push on one side of an area. Then r r F = PA Physics 122 Viscous Drag A fluid flowing in a pipe doesn’t slip through the fluid pipe frictionlessly. The The fluid sticks to the walls moves faster at the middle of the pipe than at the edges. As a result, it has to “slide over itself” (shear). There There is friction between layers of fluid moving at different speeds that creates a viscous drag force,...
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