## Problem Set 4

1. [1 pt] 24-29 of KF (time dilation)
2. [1 pt] 24-31 of KF (length contraction)

3. [1 pt] 24-34 of KF (neutron star mass)

4. [1 pt] 24-36 of KF (mass of BH candidate)

5. [2 pts] 24-42 of KF but express the mass in units of the solar
Mass and find the Schwartschild radius in pc. (density of BH)

6. [1 pt] 25-37 of KF (galactic mass < 16 kpc)

7. [1 pt] 25-40 of KF (M74 image)

8. [1 pt] 25-19 of KF (dark nebula and dark matter)

9. [1 pt] 25-6 of KF (Pop I and Pop II stars)