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Lecture 6

PHYS1080 Lecture 6: Week+06+-+Prelecture+Notes.pdf


Department
Physics
Course Code
PHYS 1080
Professor
Burnaby Orbax
Lecture
6

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Week 6 Material
Scaling
Pressure in a liquid
Units of pressure
References:
Study Guide 12 (Section 2), Study Guide 13 (Sections 1 4)
Chapters 10.4, 11.1, 11.2, and 11.5 in text book
Experiment #13
Next Week
Pressure in Gases
Barometric Equation
Surface Tension & Capillarity
Fluid Dynamics
References:
Chapters 11.3-11.9, 12.1-12.3 in text book
Experiments #13 and 14
Study Guide 13 (Sections 4 and 5) and Study Guide 14 (Section 1)

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Scaling
A set of arguments that can be used to suggest reasons behind
some trends in living organisms such as:
upper limits to size
function of organs (organelles)
strength, speed
intelligence?
age
Body Mass
Brain Mass
PRIMATES
MAMMALS
BIRDS
BONY FISH
REPTILES
H.J. Jerison, Paleoneurology and the Evolution of
the Mind, Scientific American, January 1976

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Geometric Scaling
Isometric same geometry, different size
if you double every dimension, what change is observed for
volume, area, or mass?
Key to isometric scaling: when we compare two objects, we
assume that all their linear dimensions (length, width, height)
scale in same proportion
𝒅
𝒅
𝒅
𝟐𝒅 𝟐𝒅
𝟐𝒅
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