**Prob. Set 1: Assigned Tuesday, Sept. 17, Due Thursday, Sept. 26 (this problem set is now complete):**

**Do Prob. 1.3b (skip part a). Add a part c) to this question which states: Suppose that the Sun had the density distribution that is given in part b). Find the radius which contains 90% of the Sun's mass. (The central density of the Sun is 150.5 g/cm^3.) Compare your result to the actual value given by the SSM (standard solar model). Is the density distribution of the Sun steeper or flatter than this model? Explain.**

Do Prob. 2.5. Note that height, h, refers to the height

Do Prob. 2.6. Note that the negative hydrogen ion

Do Prob. 2.7. You'll need to solve several equations in several unknown so I recommend using computer algebra to help.

3.05 a) Plot graphs of the following quantities from the standard solar model (SSM) as a function of

radius (R/Rsun); density (rho); pressure (P); temperature (T), luminosity (L/Lsun); abundance of hydrogen (X); abundance of He4 (Y)

b) Compare your results to the plots handed out in class where these quantities (except the first) were plotted against R/Rsun.

Do Prob. 2.5. Note that height, h, refers to the height

*above*the radius of the Sun in km.Do Prob. 2.6. Note that the negative hydrogen ion

*cannot*be ignored when it comes to opacity but it*can*be ignored when one considers number densities as is the case for this problem.Do Prob. 2.7. You'll need to solve several equations in several unknown so I recommend using computer algebra to help.

3.05 a) Plot graphs of the following quantities from the standard solar model (SSM) as a function of

*mass*(M/Msun) rather than radius:radius (R/Rsun); density (rho); pressure (P); temperature (T), luminosity (L/Lsun); abundance of hydrogen (X); abundance of He4 (Y)

b) Compare your results to the plots handed out in class where these quantities (except the first) were plotted against R/Rsun.

**Prob. Set 2: Assigned Thursday, Sept. 26, Due Thursday, Oct. 3 (this problem set is now complete):**

**Do Prob. 3.2. Note that**

Do Prob. 3.5. For part c), adopt a scale height of 0.063 Rsun.

Do Probs. 3.8 and 3.10

*R*is not radius, but rather is defined in the question.Do Prob. 3.5. For part c), adopt a scale height of 0.063 Rsun.

Do Probs. 3.8 and 3.10

**Prob. Set 3: Assigned Thursday, Oct. 3, Due Tuesday, Oct. 15 (this problem set is now complete):**

**Do Probs. 4.1, 5.1, 5.3, and 5.4 (below)**

**Prob. Set 4: Assigned Tuesday, Oct. 15, Due Thursday, Oct. 31: (this problem set now complete)**

Do Probs. 8.1, 8.2, 8.3, 9.1, 9.3 (for part c, assume a perturbation velocity of 1 km/s), and 11.1

Do Probs. 8.1, 8.2, 8.3, 9.1, 9.3 (for part c, assume a perturbation velocity of 1 km/s), and 11.1

**Prob. Set 5: Assigned Thursday, Oct. 31, Due Thursday, Nov. 7: (this problem set is now complete)**

**Do Probs. 9.4 (see below), 11.3, 12.1**

**Prob. Set 6: Assigned Thursday, Nov. 7, Due Monday, Nov. 18: (this problem set is complete)**

Do Probs. 15.1, 16.1, and 18.1 (see handout)

Do Probs. 15.1, 16.1, and 18.1 (see handout)