C. hydrogen accreted onto a white dwarf from a close companion rapidly fuses to helium, releasing a large amount of energy.
The accreted material, composed mainly of hydrogen, is compacted on the surface of the white dwarf due to the intense gravitational force on that place. As material accumulates, The white dwarf becomes increasingly hot, until it reaches the critical temperature for ignition of nuclear fusion.
I think frequency it sounds like the correct answer but I am not completely sure if I am correct
The basic definition of pressure is force/area and the scientific community defined that as the Pascal (Pa).
It is a chemical change and a physical change
