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Chapter 1 Presentation 7.notebook
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August 30, 2012
Aug 29-2:17 AM
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CERN's take on the Higgs BosonHiggs Field
Higgs Boson
ParticleWhat is Mass?
Chapter 1 Presentation 7.notebook
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http://dictionary.reference.com/browse/dimension
Aug 29-2:27 AM
Chapter 1 Presentation 7.notebook
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Dimensional AnalysisDerive an equation for acceleration using Dimensional Analysis
[a]=[v][t]
[x][t]2=
L/TT
=LT2=
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". . .except for a possible constant factor. . ."
2
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4 An equa �on that is dimensionally correct is always physically
correct, up to a constant of propor �onality
True
False
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Find a relationship between a constant acceleration a, speed v, and distance r from the origin for a particle traveling in a circle.
Aug 30-3:27 AM
Uncertainty & Significant Figures
Uncertainty
How is the uncertainty determined?
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1230
0.013
1.10 x 103
0.340
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Find the area of the rectangle
14.5 +/- 0.2
5.2 +/- 0.2
Multiplication/Division Rule
Aug 30-4:13 AM
Addition/Subtration Rule
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Aug 30-4:19 AM
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Factor Label
How many mph are in 12.3 x 102 cm/s
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5 The Roman cubitus is an ancient unit of measure equivalent to
about 445 mm. Convert the 2.00 m height of a basketball
forward to cubi �
A 2.52 cubi
B 3.12 cubi
C 4.49 cubi
D 5.33 cubi
E None of the above
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3s
r
3
Actual answer
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Order-of-Magnitude
x
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6 Which of the following is the best es �mate for the mass of all
the people living on Earth?
A 2 x 108 kg
B 1 x 109 kg
C 2 x 1010 kg
D 3 x 1011 kg
E 4 x 1012 kg
Aug 30-4:59 AM
Pythagorean's Theorem
2 2 2
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At 1210 ft. a passenger in a plane spots a person on the ground while looking with an angle of declination of 38o. How far is the person from the plane along the ground?
Aug 30-5:12 AM
7 At a horizontal distance of 45 m from a tree, the angle of
eleva �on to the top of the tree is 2 o. How tall is the tree?
A 22 m
B 31 m
C 45 m
D 16 m
E 11 m
