CHAPTER 45 - 2 - He 2 4 + He 2 4 Be 4 8 + He 2 4 + Be 4 8 C...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: He 2 4 + He 2 4 Be 4 8 + He 2 4 + Be 4 8 C 6 12 + 10. The diameter of our Galaxy is 100,000 ly so the angle subtended by our Galaxy is Galaxy = d 1 / D 1 = (100,000 ly)/(2 10 6 ly) = 0.05 rad = 2.9. The angle subtended by the Moon at the Earth is Moon = d 2 / D 2 = (3.48 10 6 m)/(3.84 10 8 m) = 9.06 10 3 rad = 0.52. Thus we have Galaxy 6 Moon . 11. If we assume negligible mass change, as a red giant, the density of the Sun will be = M / V = M / ) p r 3 ; = (2 10 30 kg)/ ) p(1.5 10 11 m) 3 = 1.4 10 4 kg/m 3 . 12. The angle subtended at the Earth by the Sun as a white dwarf will be = d / D = (3.48 10 6 m)/(1.5 10 11 m) = 2.3 10 5 rad = 4.8 . 13. The density of the white dwarf is dwarf = M / V = M / ) p r 3 ; = (2.0 10 30 kg)/...
View Full Document

This note was uploaded on 09/13/2010 for the course PHYSICS 7 taught by Professor ? during the Spring '08 term at University of California, Berkeley.

Page1 / 2

CHAPTER 45 - 2 - He 2 4 + He 2 4 Be 4 8 + He 2 4 + Be 4 8 C...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online