Fluid Mechanics

Question 1

branch of physics dealing with the action of fluid at rest or in motion, and with applications and devices in engineering using fluids

Answer 1

fluid mechanics

Question 2

2 major areas of fluid mechanics

Answer 2

• fluid statics
• fluid dynamics

Question 3

deals with fluids at rest

Answer 3

fluid statics

Question 4

concerns with fluids in motion

Answer 4

fluid dynamics

Question 5

applied to the flow of liquids or to low-velocity gas flows where gas can be considered essentially incompressible

Answer 5

hydrodynamics

Question 6

concerned with the behavior of liquids at rest

Answer 6

hydrostatics

Question 7

motion of gases

Answer 7

aerodynamics

Question 8

the ff. falls under fluid statics

Answer 8

• pressure (Pascal’s principle)
• density
• buoyancy (Archimedes’ Principle)
• surface tension
• capillary action

Question 9

the ff. falls under fluid dynamics

Answer 9

• types of fluid flow
• flow rate and equation of continuity
• bernoulli’s equation
• viscous fluid flow

Question 10

ratio between the mass of the substance and its volume

Answer 10

density

Question 11

ability of an object to regain its original form after the deforming force has been removed

Answer 11

elasticity

Question 12

force that allow molecules to come together and create a bigger object

Answer 12

cohesive force

Question 13

objects with more cohesive force are more ____

Answer 13

elastic

Question 14

“the amount of distortion is directly proportional to the distorting force”

Answer 14

hooke’s law

Question 15

quantity that describes the magnitude of the force causing the deformation of an object per unit area

Answer 15

stress

Question 16

3 forms of stresses:

Answer 16

• tensile
• compressive
• shear

Question 17

ratio of the magnitude of the force and the cross sectional area over which the force is acting on

Answer 17

tensile stress

Question 18

when objects are pressed or pushed together

Answer 18

compressive stress

Question 19

equal but opposite force are applied across an object

Answer 19

shear stress

Question 20

quantitative description of the resulting deformation due to the applied force

Answer 20

strain

Question 21

strain is defined as the ratio of the ____ in length of the object to the ____ length of the object

Answer 21

• change
• original

Question 22

found that “for the small value of tensile stress and tensile strain, their ratio was constant for a given object”.

Answer 22

thomas young

Question 23

force per unit area

Answer 23

pressure

Question 24

pressure at a given level

Answer 24

absolute pressure

Question 25

"the **pressure** applied to an enclosed fluid is transmitted equally in all directions and to all parts of the enclosing vessel"

Answer 25

pascal's principle

Question 26

"it states that the body immersed in a liquid is buoyed up by a force equal to the weight of the displaced fluid"

Answer 26

archimedes' principle

Question 27

"when the **speed** of the fluid increases, the **pressure** in the fluid decreases"

Answer 27

bernoulli's principle

Question 28

"for vessels having varied cross sectional area, **flow rate** in must equal flow rate out"

Answer 28

equation of continuity

Question 29

volume of water that passes a section in a unit of time

Answer 29

flow rate

Question 30

property of fluids that tends to **prevent it from flowing** when subjected to an applied force

Answer 30

viscosity

Question 31

____ viscosity fluids **resist** flow

Answer 31

high

Question 32

____ viscosity fluids flow **easily**

Answer 32

low