Fluid Mechanics Final Exam
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1. Solid A substance that does not flow perceptibly under moder-
ate stress, has a definite capacity for resisting forces which
tend to deform it, and under ordinary conditions retains a
definite size and shape.
2. Plastic Any of numerous organic synthetic or processed materials
that are mostly thermoplastic or thermosetting polymers of
high molecular weight and that can be made into objects,
films, or filaments.
3. Liquid A fluid that has no independent shape but has a definite
volume and does not expand indefinitely and that is only
slightly compressible.
4. Gas A fluid (as air) that has neither independent shape nor
volume but tends to expand indefinitely.
5. Fluid Having particles that easily move and change their relative
position without a separation of the mass and that easily
yield to pressure, capable of flowing.
6. Emulsion A system consisting of a liquid dispersed with or without
an emulsifier in an immiscible liquid usually in droplets of
larger than colloidal size.
7. Two-phase Flow Flows with gases and liquids.
8. Force A convenient abstraction to represent the pushing and
pulling interaction between objects.
9. Stress Ratio of applied force to cross-sectional area (force per
unit area).
10. Tensile Stress Tensile force per unit of cross-sectional area.
, Fluid Mechanics Final Exam
Study online at https://quizlet.com/_7o86yf
11. Compressive Stress Compressive force per unit of cross-sectional area (pres-
sure).
12. Shear Stress Shear force per unit of longitudinal area.
13. How do solids react to compres- They will change volume slightly, which slightly increas-
sive stress? es the density and decreases the specific volume. With
enough stress, a solid will deform plastically (non-linearly)
or fracture.
14. How do liquids react to compres- They will also change volume slightly (elastic deformation),
sive stress? which slightly increases the density and decreases the
specific volume.
15. How do gases react to compres- They will shrink in volume, which significantly increases the
sive stress? density (decreases the specific volume).
16. How do solids react to shear They will deform under shear stress until the material
stress? resists the stress (finite angular deformation proportional
to the shear stress).
17. How do fluids react to shear They will continue to deform as long as a shear stress is
stress? applied (continuous angular deformation strain rate pro-
portional to the shear stress).
18. Non-Newtonian Fluids Fluids having a non-linear shear stress strain rate relation-
ship.
19. Extensive Property Depends on the amount of material considered.
20. Intensive Property Independent of the amount of material considered.
21. Temperature A measure of the kinetic energy of molecules.
Study online at https://quizlet.com/_7o86yf
1. Solid A substance that does not flow perceptibly under moder-
ate stress, has a definite capacity for resisting forces which
tend to deform it, and under ordinary conditions retains a
definite size and shape.
2. Plastic Any of numerous organic synthetic or processed materials
that are mostly thermoplastic or thermosetting polymers of
high molecular weight and that can be made into objects,
films, or filaments.
3. Liquid A fluid that has no independent shape but has a definite
volume and does not expand indefinitely and that is only
slightly compressible.
4. Gas A fluid (as air) that has neither independent shape nor
volume but tends to expand indefinitely.
5. Fluid Having particles that easily move and change their relative
position without a separation of the mass and that easily
yield to pressure, capable of flowing.
6. Emulsion A system consisting of a liquid dispersed with or without
an emulsifier in an immiscible liquid usually in droplets of
larger than colloidal size.
7. Two-phase Flow Flows with gases and liquids.
8. Force A convenient abstraction to represent the pushing and
pulling interaction between objects.
9. Stress Ratio of applied force to cross-sectional area (force per
unit area).
10. Tensile Stress Tensile force per unit of cross-sectional area.
, Fluid Mechanics Final Exam
Study online at https://quizlet.com/_7o86yf
11. Compressive Stress Compressive force per unit of cross-sectional area (pres-
sure).
12. Shear Stress Shear force per unit of longitudinal area.
13. How do solids react to compres- They will change volume slightly, which slightly increas-
sive stress? es the density and decreases the specific volume. With
enough stress, a solid will deform plastically (non-linearly)
or fracture.
14. How do liquids react to compres- They will also change volume slightly (elastic deformation),
sive stress? which slightly increases the density and decreases the
specific volume.
15. How do gases react to compres- They will shrink in volume, which significantly increases the
sive stress? density (decreases the specific volume).
16. How do solids react to shear They will deform under shear stress until the material
stress? resists the stress (finite angular deformation proportional
to the shear stress).
17. How do fluids react to shear They will continue to deform as long as a shear stress is
stress? applied (continuous angular deformation strain rate pro-
portional to the shear stress).
18. Non-Newtonian Fluids Fluids having a non-linear shear stress strain rate relation-
ship.
19. Extensive Property Depends on the amount of material considered.
20. Intensive Property Independent of the amount of material considered.
21. Temperature A measure of the kinetic energy of molecules.
