Term
why are the molecular bonds of a fluid constantly breaking and reforming 

Definition
this is due to the high kinetic energy of the molecule 


Term
the only permanent force a resting fluid can exert is one 

Definition


Term
in gas, why does gravity have an insignificant effect on the path of an individual molecule 

Definition
because of the molecules high average velocity 


Term
typically in fluid mechanics, we don't know how much fluid we're dealing with, so we use intrinsic properties like 

Definition
denisty and pressureanalogous to mass and energy 


Term
what is density (in terms and in equation form) 

Definition
the heaviness of a fluid in a specified volume
density=m/V 


Term
for MCAT purposes, how should you think about liquid and solids in terms of denisty 

Definition


Term

Definition
this was created to compare the density of a substance with the density of water 


Term
there are two forms for the density of water that you should memorize, what are they 

Definition


Term

Definition
the average magnitudes of the change in momentum of these collisions divided by the time duration of the collisions and the area over which these collisions occur 


Term
even when there is not an object submerged into liquid, there is a constant pressure 

Definition
think of this as a measure of the kinetic energy of the random velocities of molecules within a fluid 


Term
what is the eqaution for pressure (pascals) 

Definition


Term
how can you determine the pressure of a fluid 

Definition
P= (density)(gravity)(depth) 


Term
how does pasacal's principle apply to liquids but not gases 

Definition
pressure applied anywhere to an enclosed imcompressible fluid will be distributed undiminished throughout the fluid.
it does not apply to gas because it is compressible 


Term
what are the two types of motion that molecules of a moving fluid can have 

Definition
random and uniform translational motion 


Term
what type of motion attributes to pressure 

Definition
random translational motion 


Term
idea fluid differs from real fluid in four ways, what are they 

Definition
zero viscosity meaning that there is no drag, so no opposition to motion
incompressible
lacks turbulence
they experience irrotational flow
All fluids on the MCAT are idealremember this 


Term
what is Bernoulli's equation 

Definition


Term
context: a tank of water has a small spigot
as the velocity of the fluid leaving increases, what happens to pressure 

Definition


Term
where is the greatest velocity of a liquid 

Definition
the middle of the pipe, furthest distance from fluidobject interface 


Term
if the pipe is narrowed, how will this effect viscosity 

Definition
it will increase viscosity 


Term
in order to discuss the elasticity of a solid we must first understand two concepts, what are they 

Definition


Term
what is stress and what is its equation 

Definition
stress is the force applied to an object divided by the area over which the force is applied
the equation is: F/A and its in N/m2 


Term

Definition
strain is a ratio of change in dimension compared to the original dimension
change of dimension/original dimension 


Term
what is modulus of elasticity 

Definition
this is a ratio that makes stress and strain proportional to each other
stress/strain 


Term
an object will only retain its shape if the stress on the object does not reach higher than 

Definition
the yield point, if it is greater than the yield point, this is what is called a fracture point, and the object will either break or be so strained it will never regain its shape again 


Term
context: solids expand when heated
as their molecules absorb energy, what happens to their vibrations 

Definition
their vibrations need more space, and vibrate faster 

