• Please sit together
in pairs:
–
–
–
–
–
–
–
–
–
–
–
–
–
Onyema and Honglu
Alejandra and Sean
Chris and Lin
Rachel and Anwen
John F. and Mengyue
Walter and Melissa
Max and Zhongyun
Matthew and Anna
Amanda and Kaijun
Pauline and Erich
Jacob and Irfan
John W. and Michael
Jennifer and Jiayuan
–
–
–
–
Alexandra and Erica
Emmanuel and Dian
Robert and David
Andrew and Shiying
Phys 150 Lecture 1
1
Phys 150 – Physics of Societal Issues
• Professor Scott Willenbrock
– Research interests in particle physics and finance
• Teaching Assistant: Mae Hwee Teo
• Intended for non-science majors interested in
science in today’s world
– No background required or assumed
– Satisfies the Physical Sciences requirement of the
Natural Sciences and Technology requirement of the
General Education requirements
– Satisfies the Quantitative Reasoning II requirement
• Textbook
– Physics and Technology for Future Presidents by
Richard Muller
– DO NOT CONFUSE WITH Physics for Future Presidents by
the same author – buy that one for your parents!
Phys 150 Lecture 1
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Other required materials
• i>clicker
– Register your i>clicker on the Phys 150 web
page
– Student ID = Net ID = your UIUC email address
(Net ID @illinois.edu)
– Set i>clicker frequency to BB
• A basic calculator
– Choose one with scientific notation
(EE or EXP button)
Phys 150 Lecture 1
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Why take this course?
• Modern science is essential to understanding and
solving major societal issues
– We will eventually run out of fossil fuels (oil, coal,
natural gas). What alternative sources of energy make
sense?
– Burning fossil fuels emits carbon dioxide. How will this
affect the Earth’s climate?
– What are the benefits and risks of nuclear energy? What
happened at Fukushima? Chernobyl? Three Mile Island?
– What are the different kinds of nuclear weapons? Why
are they hard to make?
– What are the benefits and risks of medical imaging?
How dangerous are different kinds of radiation?
– What is an earthquake? A tsunami? Where does the
Earth’s magnetic field come from?
– How do spy satellites work? How about GPS satellites?
Weather satellites?
Phys 150 Lecture 1
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How to read the textbook
• First reading of Chapter BEFORE coming to
lecture
– Read like a novel, don’t get hung up on
numbers or calculations
• Further reading of Chapter for studying
material more carefully
– Useful for homework
• Things that you can ignore:
– Footnotes (although they are often interesting)
– Sections labeled “Optional”
Phys 150 Lecture 1
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What do I really need to know?
• Everything that the author tells you that
you need to know
– Unnecessary to memorize tables of numbers
• Everything that is covered in lecture
(unless you are told otherwise)
– Lectures contain material supplemental to the
textbook
• One difference from the textbook: I will
teach you how to work with and
understand numbers
Phys 150 Lecture 1
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Weekly assignments
• Read the Chapter BEFORE coming to
Tuesday lecture.
– Read like a novel
• Quiz (almost) every Tuesday at the
beginning of class
– Multiple choice questions based on the reading
for the week
• Homework due the following Sunday at
midnight
– Multiple choice questions and written-answer
questions
Phys 150 Lecture 1
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Exams
• Exam 1 – Thursday, February 28, in class
– Chapters 1-5
• Exam 2 – Thursday, April 18, in class
– Chapters 6-10
• Final Exam – Tuesday, May 7, 7:00-10:00 PM
– Chapters 1-10
• Exams will have both multiple-choice and
written-answer questions.
Phys 150 Lecture 1
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Grading
• 60 pt (max): i>clicker - 3 points per lecture
– Starting next Tuesday
• 100 points: Quizzes - 10 points each
– Starting next Tuesday (Quiz on Chapter 1)
• 240 points: Homework – 20 points each
– Homework 1 is due Monday at midnight
• 300 points: Exams 1 and 2 – 150 points each
• 300 points: Final Exam
• 1000 points total
– A (>900), B (>800), C(>700), D(>600)
Phys 150 Lecture 1
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Turn off all electronic devices
• Except for your i>clicker, of course
• This includes laptops, smartphones, etc.
• Violators will lose their 3 points for
lecture participation
Phys 150 Lecture 1
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Chapter 1 – Energy and Power
• Chemical energy
Phys 150 Lecture 1
Canister
11
Chapter 1 – Energy and Power
• Chemical energy
Canister
100 Tons TNT
Phys 150 Lecture 1
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i>clicker question
Which of these has the LEAST amount of
energy per gram?
A.
B.
C.
D.
TNT
Chocolate Chip Cookies
Ethanol
Hydrogen
Phys 150 Lecture 1
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Energy per gram
Compared to TNT
•
•
•
•
TNT
Chocolate chip cookies
Ethanol
Hydrogen
- TNT does not require Oxygen to burn,
while the others do
Phys 150 Lecture 1
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8
10
40
Balloon
14
Energy per gram
Compared to TNT
•
•
•
•
TNT
Chocolate chip cookies
Ethanol
Hydrogen
1
8
10
40
- TNT does not require Oxygen to burn,
while the others do
Balloon
Fukushima 2011
Hindenburg 1937
Phys 150 Lecture 1
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Energy per gram
Compared to TNT
•
•
•
•
•
•
•
•
•
Car battery
Computer battery
Chocolate chip cookies
Coal
Ethanol
Gasoline
Natural gas (methane)
Hydrogen
Uranium-235
Phys 150 Lecture 1
0.05
0.15
8
10
10
15
20
40
30 million
16
Explosions
Cannon
• Rapidly expanding hot gas
Phys 150 Lecture 1
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Explosions
Cannon
• Rapidly expanding hot gas
Comet Shoemaker-Levy 9
1994
Phys 150 Lecture 1
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Explosions
• Kinetic energy = energy of motion = ½ mv2
Extinction of dinosaurs 65 million years ago
Phys 150 Lecture 1
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