Properties of fluids

Question 1

any characteristic of a system

Answer 1

property

Question 2

independent of the mass of the system

Answer 2

intensive properties

Question 3

depend on the size or extent of the system

Answer 3

extensive properties

Question 4

extensive property per unit mass

Answer 4

specific properties

Question 5

what the number of properties requires to fix the state of a sysyem

The state of a simple compressible system is completely specified by two independent intensive properties

Answer 5

state postulate

Question 6

continuous homogeneous matter with no holes therefore the atomic nature of the fluid can be disregarded

Answer 6

Continuum

Question 7

the idealisation which means that properties can be treated as ‘point functions’ and the properties differ in space and there is no jump discontinuties.
It is only balid when the size of the system is large compared to the space between the molecules

Answer 7

continuum idealisation

Question 8

the idealisation which means that properties can be treated as ‘point functions’ and the properties differ in space and there is no jump discontinuties.
It is only balid when the size of the system is large compared to the space between the molecules

Answer 8

continuum idealisation

Question 9

average distance that a moving particle travels before changing direction or energy. This usually happens due to sucessive collisions with other particles

Answer 9

mean free path

Question 10

dimensionless number which is used to determine whether a fluid medium can be approximated to a continuous medium

Answer 10

Knudsen’s number

Question 11

if Knudsen’s number is ____ the fluid medium can be approximated to a continous medium

Answer 11

small

less than 0.01 normally