Week 10

NO LAB.  BUT WE CAN WORK ON SOME PROBLEMS, TEST STUDY BOTH TOMORROW AND THURSDAY.

Test 3, chs. 5, 6

Things to know.  Magnetic field pictures.  Nine planets and properties of each.  You will be given the stephan boltzman CONSTANT, and the peak wavelength constant (no formula).  You will need to know the thermal radiation formula, the doppler shift formula, and half life (as discussed in class).

Types of spectra.  Intensity as it relates to temperature and area.  Properties of waves as related to doppler shift.  Calculation relating to doppler shift (given shift --turn it around and calculate speed).  Half life calculation.  Finding extra solar planets.  Terrestrial and Jovian planet properties.  Range of visible spectra. Density.  Solar wind.  Atomic number and Atomic mass. Densities of planets, age of solar system, solar wind, visible spectra.  Be able to identify specific planets.

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Assignments --Lecture tutorials Page 35 The Parsec, and page 39 Parallax and Distance.  We'll be working on these during lab time also.  

We will be working on Ch. 7 material this week and then moving into Ch. 10--stars and our sun.  We may get back to additional  chs 8 and 9 later.  

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Some problems to work on---very general.--not everything, but some.  Others you have worked on in hw.

Sketch magnetic fields for several magnet configurations.

  What happens to intensity output of an object if the temperature is tripled, or times 5, or...

Given an object emitting say 2000 Watts at a temperature of ----------(you fill in some reasonable numbers)----find the surface area.

Given an emission line of 500.000nm and a doppler shifted line of 499.999nm what is the speed of the source in m/s? 

 A radioactive element has a half life of 2.00days.  Starting with 5.00kg how much of the original isotope remains after two weeks.