Quiz 1 CCE 282

fluid

substance that flows

shear stress

tangential to the surface

normal stress

perpendicular to the surface

N

kg * m/s²

J

Nm

1W

J/s

micro

10^-6

1 kg

2.2 lb

1 gallon

3.78 L

1 m³

1000 L

1 ft³

7.48 gal

1 in

2.54 cm

density

mass per unit volume

density

p = mass/ volume

specific weight

λ = pg

specific gravity

SG = p / p_water

density of water

1000 kg/m³ or 1.94 slugs/ft³

SG water

9810 N/m³ or 62.4 lb/ft³

ideal gas law

p = P / RT

Shear force = T * A = M* (du/dy) * A

shear force = dynamic viscosity * (velocity / distance from plate) * contact area

cylindrical weight is static = not moving

shear force = 0

no acceleration, sum of forces = (think F=ma)

0

dynamic viscosity

related to shear forces

kinematic viscosity

related to gravitational forces

viscosity in liquids increases when temperature

decreases

viscosity in gases increases when temperature

increases

ex of high viscosity

honey

commonly used for tires

gage pressure

absolute pressure

Pabs = Pgage + Patm

liquids are

incompressible