CAS PY 105 Chapter Notes - Chapter 14: Torah, Energy Density, Viscosity
Document Summary
Learning objectives: distinguish uids from solids, when mass is uniformly distributed, relate density to mass and volume, apply the relationship between hydrostatic pressure, force, and the surface area over which that force acts. A uid is any substance that can ow. Fluids conform to the boundaries of any container in which we put them. With uids, we are more interested in the extended substance and in properties that can vary from point to point in that substance. It is more useful to speak of density and pressure than of mass and force. To nd the density of a uid at any point, we isolate a small volume element v around that point and measure the mass m of the uid contained within that element. In theory, the density at any point in a uid is the limit of this ratio as the volume element.
