QUESTIONS

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QUESTIONS

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Buoyancy

• Fb ?f ? o
• ? o submerged volume of object

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Examples

• Car ferry (25x300) ft2 60 cars, each weighs
  3000lbf. Depth of submergence?
• 50gal empty drum an aid to lift anchor weighing
  400lbf. Submerged in seawater 64 lbf / ft3.
  Force supplied by diver?

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Examples

• Hydrometer sinks 5.3cm into water at 15oC . Bulb
  displaces 1.0cc stem area 0.1cm2. Hydrometer
  weight?

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Homework

• Concrete block at 100lbf in air and 60lbf in
  water what is ? of block?
• Rectangular pontoon has width 6m, length 12m,
  and draught 1.5m. In fresh water. What is
  weight? Draught in water at 1025 kg / m 2 ?
  Load supported in fresh water?

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Buoyancy

• Mott Chapter 5
• Practice
• 5.3
• 5.4
• 5.5
• 5.13

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Schedule

• Chapters 1 through 5 pressure, forces on
  submerged surfaces, buoyancy
• 1/22 One minute paper
• 1/24 response
• 1/29 Test 1

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Fluid dynamics

• Fluids in motion
• Pumps
• Fans
• Compressors
• Turbines
• Heat exchangers

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Conservation

• Energy mass neither created nor destroyed in
  ordinary process
• Control volume
• Steady state no accumulation nor depletion

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Flowing fluid

• Steady flow
• Uniform flow
• Mass flow rate Kg/ time, lbm/time
• Volume flow rate m3/time, ft3/time, cfm, gpm

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