K
Kenny
Guest
I cannot figure out these questions! please help!
1 Over billions of years, the sun is getting
a hotter in its core
b richer in hydrogen
c smaller
d cooler on its surface
e none of these
2 Our sun will eventually become
a explode without leaving a core
b a black hole
c a neutron star
d a white dwarf
e none of these
3 A star on the main sequence of the HR diagram is likely to be
a burning helium
b burning hydrogen
c short lived
d burning carbon
e any of these
4 Stars of solar mass last longer than higher mass stars because
a the stellar mass stars are stabilized by degeneracy pressure
b larger mass stars have higher temperature and pressure in their core
c it takes longer to collapse a lower mass pre-stellar cloud
d large mass means heavier elements in the star
e none of these
5 Stellar systems get angular momentum from
a random motion of gas and dust
b spin of the original molecular cloud
c collisions with stray comets
d inflow of collapsing material
e none of these
6 In the core of our Sun,
a energy is released by hydrogen fusion
b pressure is created by nuclear repulsion
c carbon is being converted to iron
d helium is fusing to carbon
e none of these
7 A star above the main sequence on the HR diagram is likely to be
a a white dwarf
b a red giant
c small in radius
d blue hot
e none of these
8 Globular clusters are likely to have
a old first generation stars
b second generation stars
c many isolated stars
d many blue stars
e none of these
1 Over billions of years, the sun is getting
a hotter in its core
b richer in hydrogen
c smaller
d cooler on its surface
e none of these
2 Our sun will eventually become
a explode without leaving a core
b a black hole
c a neutron star
d a white dwarf
e none of these
3 A star on the main sequence of the HR diagram is likely to be
a burning helium
b burning hydrogen
c short lived
d burning carbon
e any of these
4 Stars of solar mass last longer than higher mass stars because
a the stellar mass stars are stabilized by degeneracy pressure
b larger mass stars have higher temperature and pressure in their core
c it takes longer to collapse a lower mass pre-stellar cloud
d large mass means heavier elements in the star
e none of these
5 Stellar systems get angular momentum from
a random motion of gas and dust
b spin of the original molecular cloud
c collisions with stray comets
d inflow of collapsing material
e none of these
6 In the core of our Sun,
a energy is released by hydrogen fusion
b pressure is created by nuclear repulsion
c carbon is being converted to iron
d helium is fusing to carbon
e none of these
7 A star above the main sequence on the HR diagram is likely to be
a a white dwarf
b a red giant
c small in radius
d blue hot
e none of these
8 Globular clusters are likely to have
a old first generation stars
b second generation stars
c many isolated stars
d many blue stars
e none of these