Textbook Guide Physics: Ais People, Pennsylvania Route 760, Vacuum Chamber

• School: UTSG
• Department: Physics
• Course: PHY131H1
• Professor: all

Document Summary

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. V at that point is made smaller and smaller, and this assumption allows us to write the density in terms of the mass mandvolumev of the sample: m. Density is a scalar property; its si unit is the kilogram per cubic meter.