first parcial Flashcards
density (p)
the amount of matter per unit volume
pressure (P)
pressure is the force applied on a surface
Pascal’s principle
Pressure applied to an enclosed fluid is transmitted undiminished to every part of the fluid, as well as to the walls of the container
Archimede’s principle
The buoyant force on an object immersed in a fluid is equal to the weight of the fluid displaced by that object
Surface tension
is when a liquid’s surface acts as a membrane in tension
Capillarity
is the fluid’s capacity to go up through a capillary tube (of a very small diameter)
laminar flow
a fluid in motion continues in a stream line
turbulent flow
a fluid in motion swirls and doesn’t follow a single stream line
continuity
Let’s say you reduce the area of the hose by placing your finger in front of it. Then, according to the continuity equation the flow should stay the same. This means that to compensate for the loss in area, the speed needs to be larger.
Bernoulli’s principle
the work done on a unit volume of fluid by the surrounding fluid is equal to the sum of the changes in kinetic and potential energies per unit volume that occur during the flow
Torricelli’s theorem
the speed at which a liquid will be moving, if there is no change in pressure and only the gravity acts on it
longitudinal wave
They produce compression efforts
transverse wave
produce cutting efforts, because they are perpendicular to the spread direction
rayleigh waves
These are spread similarly to sea waves
love ways
These are spread horizontally with cutting effort.
