5. For the sun to be stable, the inward and outward forces within the sun must be (1 point)in equilibrium.
part of the fusion reaction.
focused in the core.
balanced with temperature and density.

6. The parallax of a star is observed because (1 point)all stars have the same apparent brightness.
parallax increases with distance.
stars do not move.
the observer moves.

Question

5.   For the sun to be stable, the inward and outward forces within the sun must be  (1 point)in equilibrium.
part of the fusion reaction.
focused in the core.
balanced with temperature and density.

6.   The parallax of a star is observed because  (1 point)all stars have the same apparent brightness.
parallax increases with distance.
stars do not move.
the observer moves.

anonymous · Answer

5. In equilibrium. This refers to the forces due to expansion and contraction being equal in magnitude.

6. The observer moves. Parallax is taken, from Earth, when the Earth is on opposite sides of its orbit. This means that the observer has changed position, and the position of the star has changed against the background as a consequence.