Chapter 13- Fluids

Question 1

What is the formula for the density of a fluid/gas?

Answer 1

density (p) = mass/volume (kg/m^3)

Question 2

Formula for pressure

Answer 2

Force/area (measured in Pascals= N/m^2)

Question 3

Gauge pressure

Answer 3

pressure - atmospheric pressure

Question 4

Pressure of a liquid at a specific depth

Answer 4

p = p(surface) + (density)gd; d is depth, g is gravity

Question 5

Conversion of 1 atm to kPa

Answer 5

101kPa

Question 6

State when pressure is the same at all points on a horizontal line through a connected liquid

Answer 6

Hydrostatic equilibrium

Question 7

Pascal’s principal

Answer 7

If pressure changes at one point in a fluid, the pressure changes by the same amount at every other point.

Question 8

Buoyancy

Answer 8

Fb= density (p) V(f) g ; Volume of fluid, g is gravity;

or Wf = density(p) Vf g

Question 9

Archimedes Principal

Answer 9

A fluid exerts an upward buoyant force on an object immersed in or floating on the fluid. The magnitude of the force is the weight of the fluid displace by the object.

Question 10

Atmospheric pressure formula

Answer 10

p(atmos)= density x g x h

Question 11

Weight of object

Answer 11

= avg density x Volume x gravity

Question 12

Force of buoyancy equals weight of object

Answer 12

Volume fluid = (density of object/density of fluid) x volume of object

Question 13

Fluid in motion: Reynolds number

Answer 13

A large reynolds number means a small viscous flow

density x velocity x L/ viscosity

Question 14

Equation of continuity

Answer 14

V1A1= V2A2; the volume of fluid entering one part of a tube must be match by an equal volume leaving downstream