Term
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Definition
| whales, dophins, porpoises, otters |
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Term
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Definition
true seals (phocid)
fur seals (othriid)
walrus (Odobenidae) |
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Term
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Definition
manatees (Trichechidae)
Dugongs (Dugongidae) |
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Term
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Definition
size is...
not correlated to the speed of the animal |
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Term
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Definition
| drag is the rate of removal of momentum from a moving body immersed in a fluid |
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Term
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Definition
P=Du
P=power output
D=drag
u=speed |
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Term
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Definition
1.Viscous Drag or Skin Friction
2.Pressure Drag
3.Wave Drag |
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Term
| Viscous Drag or Skin Friction |
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Definition
| effects felt in boundary layer (close to body suface) |
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Term
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Definition
*Proportional to surface area & the sq area of speed
*Body creates a low pressure wake behind it |
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Term
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Definition
*kinetic energy transformed into potential enegry in the waves
*Reaches a maximums at a depth of 0.5 body diameter |
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Term
| Thin layer of fluid whose velocity is affected by the body surface (fluid in boundry layer does not move relative to body surface) |
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Definition
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Term
| occurs dues to the friction of the fluid against the body surface |
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Definition
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Term
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Definition
higher surface area to volume ratio
(better!) |
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Term
| why do dolphins shed their skin every 2 hours? |
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Definition
| they are "bare skinned cetaceans" because of their epidermal cell |
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