## Physics 320: Astrophysics Homework

### Spring 2006

Problems mainly from Introduction to Cosmology by Barbara Ryden

• HW 1:
• Due 5 p.m. (Monday) 23 Jan 06
• Posted (Sunday) 15 Jan 06
• Revised (Wednesday) 18 Jan 06
• Problem 2.0: Assume Ho = 71km/s/Mpc and explicitly calculate the Hubble time in Gyr and the Hubble distance in Mpc.
• Ryden 2.1, 2.2, 2.5
• Average = 14.5 / 16

• HW 2:
• Due 5 p.m. (Monday) 30 Jan 06
• Posted 9:30 p.m. (Monday) 23 Jan 06
• Revised 2 p.m. (Wednesday) 25 Jan 06
• Average = 18.3 / 20

• HW 3:
• Due 5 p.m. (Monday) 6 Feb 06
• Posted 8 p.m. (Tuesday) 31 Jan 06
• Ryden 3.1, 3.2, 3.3, 3.5
• Average = 15.1 / 16

• HW 4:
• Due 5 p.m. (Monday) 13 Feb 06
• Posted 10:30 p.m. (Monday) 6 Feb 06
• Average = 13.1 / 16

• HW 5:
• Due 5 p.m. (Monday) 20 Feb 06
• Posted 8:00 p.m. (Monday) 13 Feb 06
• Ryden 4.1, 4.2, 4.4, 4.5
• Average = 13. 4 / 16

• HW 6:
• Due 5 p.m. (Monday) 27 Mar 06
• Posted 2:00 p.m. (Wednesday) 8 Mar 06
• Ryden 5.1, 5.2, 5.4
• Average = 11.8 / 12

• HW 7:
• Due 5 p.m. (Monday) 3 Apr 06
• Posted 4:00 p.m. (Wednesday) 29 Mar 06
• Problem 6.0: Explicitly show that Equations 6.20 & 6.21 solve 6.15.
• Ryden 6.5, 6.8
• Average = 10.9 / 12

• HW 8:
• Due 5 p.m. (Monday) 10 Apr 06
• Posted 9:50 p.m. (Wednesday) 5 Apr 06
• Ryden 7.3, 7.6, 7.7
• Average = 10.9 / 12

• HW 9:
• Due 5 p.m. (Monday) 24 Apr 06
• Posted 5:20 p.m. (Friday) 21 Apr 06
• Ryden 9.1, 9.2, 9.3
• Average = TBA

• HW 10:
• Due 5 p.m. (Monday) 1 May 06
• Posted 5:20 p.m. (Friday) 21 Apr 06
• Ryden 10.1, 10.2, 10.3
• Average = TBA