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Web Activities
UNIT 5 - MATTER-ENERGY INTERFACE
Chapter 13 - Radioactivity and Elementary Particles
13.2 Rate of Radioactive Decay
13.3 Working with Particles
13.4 Particle Interactions
13.5 The Particle Zoo
Careers
Chapter 13 Review (p. 737)
Unit 5 Performance Task (p. 738-9)
Unit 5 Review (p. 745)
Chapter 13 - Radioactivity and Elementary Particles
13.2 Rate of Radioactive Decay
Section 13.2 Questions (p. 686)
- Research the methods used in mining radioactive substances, such
as uranium. Briefly describe some of the safeguards taken to protect
the health of the miners.
Nuclear
Electricity
A website from the uranium information centre of Melbourne, Australia.
Read section 4.1: Mining and Milling of Uranium Ore.
Canadian
Nuclear Safety Commission
The Canadian Nuclear Safety Commission (CNSC) can be best described
as the watchdog over the use of nuclear energy and materials in
Canada. You need to search for it but there is a lot of information
on Mining and Milling safety safeguards.
Government
of Australia
This is the Supervising Scientist Division that is responsible of
radiation safety in milling and mining of Uranium. This is a health
code developed and implemented for maximum acceptable dose exposure
of Uranium miners.
13.3 Working with Particles
Explore an Issue: Funding Research on Elementary Particles
(p. 692)
- Search the Internet using key words such as "particles physics"
and "particle accelerators." Visit the Web sites at Brookhaven,
CERN, Fermilab, TRIUMF, and Stanford to get an idea of the megaprojects
currently underway.
- Imagine that you are in charge of building the next gene ration
of superaccelerator. You have settled on a synchrotron 100 km in circumference.
- From which organizations would you seek funding? What would
be the basis for your proposal?
- What opposition would you expect to encounter? How would
you deal with it?
- What recommendations regarding future directions for elementary
particle research would you make to the international research community?
Brookhaven
National Laboratory
Gateway
to CERN
European Laboratory for Particle Physics. Includes an introduction
of the laboratory, information on experiments being conducted, publication
archives, photos and press releases.
Fermi
National Accelerator Laboratory
A proton-antiproton collider in Batavia, Illinois.
TRIUMF
Home Page
Tri - University Meson Facility in Vancouver, Canada. A particle
accelerator which focuses on pion and kaon experiments
Section 13.3 Questions (p. 698)
- In this section, you learned that sophisticated computers are
needed to process the data from particle experiments. Visit the TRIUMF
Web site and learn about new microchips created for this purpose.
TRIUMF
Home Page
Tri - University Meson Facility in Vancouver, Canada. A particle
accelerator which focuses on pion and kaon experiments.
13.4 Particle Interactions
Section 13.4 Questions (p. 704)
- Visit the SNO Web site and answer the following questions:
- Approximately how many people were involved in constructing
the facility?
- How has the facility been funded?
- What is the expected lifespan of the facility?
- Briefly describe one of the three ways in which neutrinos
are detected in the SNO.
- Briefly describe some research results from the facility.
The
SNO Homepage
The Sudbury Neutrino Observatory
13.5 The Particle Zoo
Section 13.5 Questions (p. 712)
- How many different elementary particles are there in a CO2 molecule?
General
Chemistry Online: Library of common compounds
A searchable database of over 800 common compound names, formulas,
structures, and properties.
ChemSketch:
free software - Advanced Chemistry Development, Inc.
Molecule drawing and modeling program. Download for free. "In
the past four years the Chemsketch drawing package has attracted
enthusiastic comments from its users and it has been acknowledged
to be the most powerful and easiest to use molecular structure and
chemical drawing tool available today."
elementary
particles on Encyclopedia.com 2002
A very good overview of elementary particles including the laws
that govern them and standard models.
Careers
Practice (p. 733)
- Identify several careers that require knowledge about matter
and energy. Select a career you are interested in from the list you
made or from the careers described above. Imagine that you have been
employed in your chosen career for five years and that you are applying
to work on a new project of interest.
- Describe the project. It should be related to some of the
new things you learned in this unit. Explain how the concepts
from this unit are applied in the project.
- Create a resume listing your credentials and explaining why
you are qualified to work on the project. Include in your resume:
- your educational background: what university degree or
diploma program you graduated with, which educational institute
you attended, post-graduate training (if any)
- your skills
- your duties in previous positions
- your salary expectations
Monster.ca
Workopolis.com
Jobs.net
Physics
Web - Careers in Physics
These sites are major job searching sites for Canada. Look for
careers in the Engineering and Science field.
Chapter 13 Review (p. 737)
- Recall from previous quantum theory work in this text that particles
can appear spontaneously from the "quantum vacuum" under appropriate
conditions. Recall also that virtual particles, such as virtual photons,
can mediate forces.
- What are the special conditions that apply to the creation
and properties of virtual particles?
- How do these special conditions govern the relation between
the mass of a virtual particle and the distance over which it
can act?
- If a virtual particle were massless, what conclusion might
reasonably be drawn about the range over which the consequent
force can act?
Virtual
Particles
Some frequently asked questions about virtual particles. This is
a very good introduction.
Virtual
Photon
This is an applet that shows the absorption of radiation by an atom
and the subsequent emission of the virtual photon.
The
Particle Adventure
This is an award winning site from Berkley that "takes you on
a tour of the inner working of an atom".
Unit 5 Performance Task (p. 738-9)
Performance Task: Part I
In preparation for your selected task, research the Internet and other
sources and provide a report, including diagrams, on the following topics:
- How do solar cells use the photoelectric effect to convert solar
energy to electricity?
- How efficient are solar cells? Include methods for enhancing
the efficiency.
- Compare and contrast photovoltaic technology with other forms
of electricity generation, including the impact on the environment.
- Briefly summarize the significant advantages and disadvantages
of solar power generation.
Howstuffworks
"How Solar Cells Work"
Good overview of the technology and scientific theory behind the
solar cell.
National
Center for Photovoltaics - An Informational Resource for PV
A very good source for information on solar cells. The virtual library,
in particular, is an excellent resource for information from "how
solar cells work" to information on the "Department of Energy's
Photovoltaics Program."
National
Renewable Energy Laboratory (NREL) Home Page
This site bills itself as "The U.S. Department of Energy's premier
laboratory for renewable energy research & development and a
lead lab for energy efficiency R&D". There is a tremendous
amount of information here on solar cells and other renewable energy
sources.
Unit 5 Review (p. 745)
- Some television remote controls use an infrared beam to send
signals to a photodetector on the television. Research the Internet
and other sources, and find out how the remote control can send a
variety of signals using a single wavelength of light. Present your
findings to the class.
Inside
a TV Remote Control
This site looks at the insides of a TV remote. It has discusses
the infrared beams of the LED but focuses more on the overall workings
of the remote control itself.
Decoding
IR Remote Controls
This is an in-depth look at Infrared coding. It deals with both
the circuitry and the types of waves produced.
infrared
remote control technology and ASIC design
A manufacturer of remote controls that gives an information page
that includes designing your own remote and how voice operated remotes
work.
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