Homework may be submitted by email (ronney@usc.edu), by fax (213-740-8071) or put in my mailbox (down the hall from my office in the OHE 430J suites, in the small room with the copy machine). DEN students should submit through the usual channels.

Chapter 1:

Earth energy balance: 1.3 (fun fact: in reality this heat generation comes from decay of radioactive atoms). Answer: 6 x 10¹⁶ Watts

Radiation to/from a spacecraft: 1.6. Answer: 302K

Radiation through semi-transparent material: 1.8. Answer: 2500K, efficiency 3.34%. You can use my Excel spreadsheet (http://ronney.usc.edu/AME517F09/PlanckFunction.xls).

Radiation through semi-transparent material: 1.11. Answers: (a) 66 W/m² (b) 337 W/m² (c) 34%

Chapter 4:

4.8 (try crossed-strings method)

4.11

4.12. Answers: (a) 0.106 (b) 0.025

4.18. Answer: 0.433