Gen Phys 1

Fluids

Video

Article

Equations

\begin{equation} \rho = \frac{m}{V} \qquad (\textnormal{Density}) \tag{1} \end{equation} \begin{equation} p = \frac{F}{A} \qquad (\textnormal{Pressure}) \tag{2} \end{equation} \begin{equation} p = \frac{dF_{\perp}}{dA} \end{equation} \begin{equation} \Delta p = - \rho g \, (y_2 - y_1) \qquad (\textnormal{Pressure in uniform density fluid}) \tag{3} \end{equation} \begin{equation} p = p_0 + \rho \, g \, h \end{equation}

Pascal's law: Pressure applied to an enclosed fluid in a container is transmitted to every part of the fluid and to the walls of the container.

Archimede's principle: When a body is partially or completely submerged in a fluid, the fluid exerts a force on the body equal to the weight of the displaced fluid.

\begin{equation} A_1 \, v_1 = A_2 \, v_2 \qquad (\textnormal{Continuity equation, incompressible fluid}) \tag{4} \end{equation} \begin{equation} \frac{dV}{dt} = A \, v \qquad (\textnormal{Volume flow rate}) \tag{5} \end{equation} \begin{equation} p_1 + \rho g y_1 + \frac{1}{2} \rho v_1^2 = p_2 + \rho g y_2 + \frac{1}{2} \rho v_2^2 \qquad (\textnormal{Bernoulli's equation}) \tag{6} \end{equation}

Exercises

  1. problem 1
  2. problem 2
  3. problem 3

Quiz

  1. Question 1
  2. Question 2
  3. Question 3

Next module Oscillations