During the transition of a protostar into a main sequence star, the core temperature and density increase until a specific physical process begins, establishing hydrostatic equilibrium.
State the physical process that initiates in the core to mark this transition.
42 exam-style questions on Edexcel GCSE Physics 7.3 Stars, covering 7.3.1 Evolution of stars similar to the Sun, 7.3.2 Evolution of massive stars, and 7.3.3 Observing the Universe. Each one has a worked solution and a mark scheme showing where the marks go.