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Physlet® Physics 2E: Fluids

Chapter 14: Static Fluids

The study of fluids brings us to an application of Newton's Laws and Conservation of Energy that does not involve rigid bodies and point particles. Instead of mass and force we use density and pressure, but the laws do not change. We simply apply them in a different context. This chapter focuses on fluids that are static, i.e., stationary. The basic concepts allow us to understand pressure variations in fluids and objects that float (or sink) in fluids.

Chapter 15: Fluids in Motion

Fluid dynamics is a rich and complex field of study with turbulence and chaos in its wake. For our purposes, however, just as in the case when we first introduced Newton's laws where we learned how to describe motion on "frictionless" surfaces, we will focus primarily on ideal fluids (fluids without friction (no viscosity) and fluids that do not rotate). The two main equations we will use are the continuity equation (what flows in must flow out) and Bernoulli's equation (conservation of energy). As a result, we will be able to understand the connection between fluid motion and pressure.

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