White dwarfs and neutron stars. Recall that density is mass divided by volume and consult Chapter 0 and Appendix E as needed, (a) Calculate the average density of the earth in g/cm3, assuming our planet to be a perfect sphere, (b) In about 5 billion years, at the end of its lifetime, our sun will end up as a white dwarf, having about the same mass as it does now, but reduced to about 15.000 km in diameter. What will be its density at that stage? (c) A neutron star is the remnant left after certain supernovae (explosions of giant stars). Typically, neutron stars are about 20 km in diameter and have around the same mass as our sun. What is a typical neutron star density in g/cm3?
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