Physics 3 - Fluids

Question 1

density(p)

Answer 1

p=m/vunits: kg/m3

Question 2

density of water?

Answer 2

1000kg/m3 or 1g/cm3

Question 3

specific gravity?

Answer 3

sp. gravity= psubstance/pwater

Question 4

fluid pressure equation?

Answer 4

P=F/a(area)units: Pascal (N/m2)

Question 5

hydrostatic pressure equation?(fluid at rest,Pascal’s law)

Answer 5

pressure=density(p)*gy

Question 6

what is atmospheric pressure?

Answer 6

101,000 Pa, 1 atm, or 760 mmHg

Question 7

buoyant force equation?

Answer 7

Fb=pfluidVfluidg

Question 8

the buoyant force on an object= ?

Answer 8

weight of displaced fluid

Question 9

fraction submerged equation?

Answer 9

pobject/pfluid=fraction submerged

Question 10

a floating object displaces volume of fluid=

Answer 10

to its own mass

Question 11

characteristics of ideal fluid?

Answer 11

no viscosity, incompressible, uniform density, steady flow

Question 12

volume flow rate equation?

Answer 12

Q=Av

Question 13

Bernoulli’s equation?

Answer 13

v=sqrt(2gh)as velocity increases, pressure decreases.

Question 14

venturi effect?

Answer 14

as cross sectional area decreases, velocity increases and pressure decreases (as stated in Bernoulli’s shit)

Question 15

poiseuille’s law

Answer 15

states that a small increase in radius=large increase in flow rate.Q=deltaP(pir4)/8nL

Question 16

blood flow rate is ___ throughout the body

Answer 16

equal

Question 17

what does (+) mean?

Answer 17

dextrorotatory

Question 18

what does the continuity equation state?

Answer 18

while flow rate can change, the volume displaced remains the same

Question 19

what is the continuity equation?

Answer 19

A1v1=A2v2

Question 20

what are the characteristics of laminar flow?

Answer 20

SHEAR FORCES, “stacking effect” so its faster in the middle and slower on the sides of the walls

Question 21

how do you find the density of an object when you are given its specific gravity?

Answer 21

multiply the specific gravity by the density of water (keeping an eye on units)