Review for Quiz 2
NATS 102
Announcements
Quiz 2 happens next class.
Bring your 1 page “cheat sheet”
Bring your calculator
Study the last quiz (questions will be similar)
Note that your paper is far more important
Don’t panic
Science News
As reported in The Economist (29 March 2008, pg 205), a
study at Florida State University indicates that people do not
make good decisions on low blood sugar.
Eat before exams
Coulomb’s law
Two negative particles are 10 inches away from each
other, do they feel a repulsive or attractive force?
These particles are moved to 30 inches away from
each other. By what factor precisely does the force
that they inflict on each other change?
They are moved back to 10 inches distance, but now
one has a charge that is twice that of before. How
does the force differ from the original set-up?
Light
How can light be described in terms of electric and magnetic fields?
What are particles of light called?
What is the equation that relates the wavelength of a light particle to its
energy?
Which has a higher energy: UV light and radio waves?
Which has a longer wavelength: UV light and visible light?
Thermal Radiation
What is the mathematical expression the provides the power of radiation
emitted per unit surface area by a body of temperature T?
Express the power unit of Watts in terms of meters, seconds, kilogram.
What is the equation that relates the wavelength of a light particle to its
energy?
Which has a higher energy: UV light and radio waves?
Which has a longer wavelength: UV light and visible light?
Thermal Radiation Cont.
What the power of radiation emitted per unit surface area by a body of
temperature 30,000 K?
Compare the total power of two round objects (two stars).
Both star A and star B are 20,000 K, but star B has a radius 2
times that of star A. How much more power does star B emit?
Star A is 20,000 K and Star B has a temperature twice that of star
A
How much more power does star B emit?
Thermal Radiation Cont.
What the power of radiation emitted per unit surface area by a body of temperature
30,000 K?
Compare the total power of two round objects (two stars).
Both star A and star B are 20,000 K, but star B has a radius 2
times that of star A. How much more power does star B emit?
Star A is 20,000 K and Star B has a temperature twice that of star A
How much more power does star B emit?
Greenhouse Effect
What is the Greenhouse Effect?
Describe what radiation is involved?
What defines a greenhouse gas?
What are examples of greenhouse
gases?
Global Warming
What are three measurements that indicate that the
Earth’s atmosphere is, on average, warming? (Provide
numbers)
Atoms
What defines an element?
What is alpha, beta and gamma decay?
How in detail does carbon decay work?
What is the parent element?
How is it made?
What is its half life?
What is the daughter element?
What does this technique date
precisely?
What does uranium U238 date?
Atomic Electron Energy States
What can cause an atomic electron to jump to a higher energy state?
What kind of additional “particle” is involved?
How does the energy of this particle relate to the lower initial energy state,
E1, and the higher final energy state?
What how does the particle’s wavelength relate to its energy?
Electronic Structure
What defines the sequence of the periodic table?
What defines the rows of the table?
How does ionic, covalent, and metal bonding work?
Suppose you have a molecule consisting of two atoms
ionically bonded. From which two columns might
these atoms belong?
Geology: The rock cycle
What are sedimentary, metamorphic & igneous rocks?
How do they manifest the rock cycle?
What are examples of each kind of rock?
Geology: Plate Tectonics
Define plate tectonics.
What evidence is there for plate tectonics?