What kind of pressure holds up a white dwarf star against its gravity?
A. Atomic pressrure. B. Nuclear pressure. C. Gas pressure of a hot plasma. D. Electron degeneracy pressure. E. Neutron degeneracy pressure. • If you add 0.02 solar masses to a 1.39 solar mass white dwarf, then its radius will: A. decrease slightly; B. increase slightly; C. collapse to a neutron star; D. collapse to a black hole; E. explode. Tue 2009 Nov 10: • The transition between atomic pressure and electron degeneracy pressure in cold matter at very high density occurs when: A. The matter is cooled to absolute zero temperature; B. The matter is heated to the point where the electrons are ionized; C. The electrons are compressed to the point where their velocities exceed the atomic velocity c/137; D. The electrons are compressed to the point where their velocities approach the speed of light c; E. The electrons and protons fuse into neutrons. • The fact that pulsars were observed to pulse at several different radio frequencies ruled out the possibility that pulsars were LGM (Little G
