Answer Happy

QUESTION 35 A star which is burning hydrogen and helium in shells is probably a a. white dwarf b. main sequence star c. red giant O d. binary

QUESTION 36 The nuclear reactions in a star's core are kepe under control so long as a. the star's luminosity depends on its mass. b. the pressure of a gas depends on its temperature. c. the star's density depends on its mass. d. the star's mass depends on its temperature. QUESTION 37 The helium burning phase of a given star is much shorter than its hydrogen burning phase because O a. there is less helium available b. helium releases less energy per reaction c. it contracts rapidly throughout helium burning O d. the star dies before it has a chance to use most of its helium QUESTION 38 During the main-sequence phase of its life, a star fuses a. hydrogen to helium in its core. b. hydrogen to helium in a shell. c. helium to carbon in its core. d. helium to carbon in a shell.