Flashcards in Fluids Physics Deck (30):

1

## What does specific gravity tell us?

### How dense something is when compared to water

2

## What is pressure?

### Force divided by area

3

## What is hydrostatic gauge pressure?

### Pressure due to water in tank

4

## What is hydrostatic gauge pressure proportional to?

### Depth and density

5

## Under what circumstances is total pressure not proportional to depth and density of the liquid?

### When pressure on the surface does not equal zero

6

## If the density of a liquid is constant it is said to be

### Incompressible

7

## What is buoyant force equal to?

### Weight of the fluid displaced by the object

8

## Archimedes principle

### Buoyant force = weight of fluid displaced by the object

9

## If density of object is less than density of fluid

### Object will float

10

## If object density greater than fluid density

### Object will sink

11

## When does static equilibrium result?

### When object has same density as fluid

12

## Pascals law

### Confined fluid will transmit an externally applied pressure change to all parts of the fluid and container without a loss of magnitude

13

## What is flow rate?

### Volume of fluid that passes a particular point per unit time

14

## What is flow speed?

### How fast the fluid moves

15

## When does flow speed increase?

### When tubes narrow

16

## When does flow speed decrease?

### When tube widens

17

## What is the relationship between flow speed and cross sectional area?

### Inversely proportional

18

## What are requirements for ideal fluid flow?

### Fluid is incompressible, viscosity is negligible, streamlines are visible, flow rate is steady

19

## What condition of flow does bernoullis equation apply to?

### Ideal fluid flow

20

## What is efflux speed?

### How fast fluid will flow out

21

## What is torcellis result?

### Shows the efflux

22

## When flow speed is greater, what is pressure?

### Pressure is lower

23

## What is stress?

### Force divided by area

24

## Why doesn't stress equal pressure?

### It does not have to be perpendicular to the area that it acts on

25

## What is strain?

### Ratio of appropriate change in length to objects original length

26

## What is Hookes law?

### Stress is proportional to strain

27

## What is Young's modulus?

### Constant of proportionality for tensile or compressive stress

28

## What is shear modulus?

### Constant of proportionality for shear stress

29

## For tensile tensile or compressive stress what is strain equal to?

### Change in length over original length

30