Stellar evolution and observing the Universe

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Question 30
Easy

Figure 1 shows the forces acting on a stable main sequence star, such as our Sun.

A diagram of a spherical star, labeled 'Main Sequence Star'. There are two sets of arrows: Arrow A points inwards towards the core of the star from all directions around the circumference, and Arrow B points outwards from the core towards the surface. The star is in a stable, balanced state.

The outward force (Arrow B) is caused by the thermal expansion pressure from nuclear fusion reactions in the core.

State the name of the inward force (Arrow A) that balances this outward force.

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Stellar evolution and observing the Universe Questions

  1. GCSE
  2. /Physics
  3. /Stellar evolution and observing the Universe