What causes the outward gas pressure that balances the inward pull of gravity in a main-sequence star?
A)the rapid outward flow of gas
B)the rapid inward flow of gas
C)the high temperature and density of the gas
D)the low mass of helium nuclei

Question

Quizplus · Accepted Answer

The outward gas pressure in a main-sequence star is caused by the high temperature and density of the gas. This high temperature and density create a high pressure within the star that pushes outward, balancing the inward pull of gravity. The pressure is generated by the thermal energy produced by nuclear fusion reactions in the star's core.

What Causes the Outward Gas Pressure That Balances the Inward