Homework 2

DUE Tue. Feb. 21
at the beginning of class
Homeworks turned in after lecture has begun will be considered late.

All problems are from the text, Universe (7th edition) by Freedman & Kaufmann.


# ChapterQuestion
1.1955*
2.1956
3.1957
4.1964
5.2131
6.2132
7.2134
8.2136
X** 2139

* Also use Fig. 19-12 to find the temperature and spectral types of stars with equal line strenghts of (i) iron (Fe I) and calcium (Ca I) and (ii) neutral and singly ionized helium (He I and He II).

** Extra credit.

Be sure to show your work. A simple "Yes" does not constitute a complete answer. You must write in complete sentences and show all mathematical computations to receive full credit. Your homework must be legible for us to grade it - please be neat!