Question

2) Densities We discussed White Dwarfs and Neutron stars, very dense objects compared to stars like our sun. On the other hand, we also discussed Red Giants which are much less dense than our sun. To realize just how dense, please compute the average densities (in kg/m) for a) the sun (Rsun=7 x 10 km, Msun= 2 x 1030 kg) b) when the sun becomes a red giant (R= 1AU, M=Msun). By what factor is a Red Giant less dense than our sun? c) a typical White Dwarf with the same mass as our sun, but the radius of the Earth (R=6000 km). By what factor is a White Dwarf more dense than our sun? a typical neutron star with the same mass as our sun, but with the radius of Brooklyn (R=10 km). By what factor is a Neutron Star more dense than our sun? Remember that the equation for density is density = Mass/Volume and for spherical objects such as stars, the volume is 1.30R' where R=radius. So Density = Mass/(1.39R)

Answer 1

1. 
   ZO - 2x10 NO) (1. 37 R 7x16km=7x10 m Density of Sun Domov Don - 1427.7187 kg / m3). 6 R = 1 AU= 1.496x10 m Density of reg diant, D= (1.3 XTX (16496+105) ID= 1.4626x104 kg/m3 factor D - 1.4626x109 Dsun - 1427.7187 = 1160 244810/ times less denser ② Density of white dused, D - 2x1030 = 2.2 (1.3xã x (6X1093) 2x1030 qka
   
   factor -22672x10- 1.58790 Den 1427.71871 times more desser than Sun d) Density of Neition Stax, D 2x103 - (1.3xnx (104) 3) = 4-8971810 kg 3 4,2971x16" 3.4300x104 Dsun - 14277187 -1 more denses than som 17 Pactos times