Physics II PHY 202/222 Fluid Mechanics

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Physics II PHY 202/222 Fluid Mechanics

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• Rock Hill, SC 29730
• www.yorktech.com

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Fluid Mechanics Test 1

• Beiser Chapters 16 17
• Multiple Choice All
• Supplementary Problems 16 even, 17 odd
• Browne Chapter 15 for PHY 222 Students
• Supplementary Problems - Odd

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Chapter 16 Fluids at Rest
Beiser p.190
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Density
Density is the mass per unit volume of a
substance.
Beiser p.190
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Density Examples
Beiser Solved Problem 16.3 p.191 An oak beam 10
cm by 20 cm by 4 m has a mass of 58 kg. Find the
density of the beam.
Beiser Solved Problem 16.2 p.191 Find the
volume of a 250 kg lion if the density of mammals
is equal to water.
Beiser p.190,1
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Densities of materials

• Solids
• Wood .3-.9 g/cm3
• Ice .91 g/cm3
• Stone 2.3 g/cm3
• Al 2.7 g/cm3
• Iron 7.8 g/cm3
• Steel 7.8 g/cm3
• Cu 8.9 g/cm3
• Pb 11.3 g/cm3
• Au 19.3 g/cm3

• Liquids
• Gas .68 g/cm3
• Water 1 g/cm3
• Sea 1.025 g/cm3
• Hg 13.6 g/cm3

• Gases
• He .179 g/cm3
• Steam .598 g/cm3
• Air 1.29 g/cm3

Beiser p.190
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Specific Gravity
Specific Gravity is the density of a substance
divided by the density of water.
This is a nice way to say that lead is 11.3 more
dense than water.
Beiser p.190
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Pressure
Pressure is the ratio of the force on an object
to the area over which the force is distributed.
Beiser p.191
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Other Units of Pressure
Beiser p.191
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Gauge Pressure
Gauge pressure is what a pressure gauge reads
shows the pressure above atmospheric pressure
Beiser p.191-2
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Hydrostatic Pressure
Gauge pressure is what a pressure gauge reads
shows the pressure above atmospheric pressure
Beiser p.192-3
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Archimedes Principle/Buoyancy
Buoyant force is equal to the weight of the of
the fluid displaced by an object. If the
buoyant force is more than the weight of the
object, the object floats.
FB (the buoyant force)
mg (the weight)
Beiser p.193
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Hydraulic Press
Beiser p.195
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Chapter 17 - Fluids in Motion
Beiser p.201
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Fluid FlowEquation of continuity
v1
v2
d2
d1
Beiser p.201
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Bernoullis Equation
Relates pressure, velocity and change of height
of fluid moving in a pipe
Beiser p.203-4
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Torricellis Theorem
Gives the velocity of fluid escaping from a hole
a distance h below the surface of the fluid.
Beiser p.204
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Viscosity Poiseuilles Law
Beiser p.207-8
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Reynolds Number
Beiser p.208
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Worked Examplesfrom chapters 16 and 17 of Beiser
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16.7 SP Beiser
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16.9 SP Beiser
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16.11 SP Beiser
16.15 SP Beiser
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16.17 SP Beiser
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16.19 SP Beiser
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16.21 SP Beiser
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17.2 SP Beiser
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17.4 SP Beiser
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17.6 SP Beiser
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17.10 SP Beiser
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17.12 SP Beiser
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17.14 SP Beiser
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17.18 SP Beiser