Which barrier initially opposes hydrogen fusion within protostars?

💡 Explanation

Electrostatic repulsion creates the Coulomb barrier, because fusion requires nuclei to overcome this force to get close enough for the strong nuclear force to dominate. Therefore, fusion is initially hindered, rather than aided by gravitational pressures or radiation properties at this stage.

• Which risk specifically increases when a cryogenic storage vessel warms?
• Which risk increases when adaptive optics fail during laser micromachining?
• Which risk increases in a nuclear power plant when fission products accumulate?
• Which effect results when a dielectric window impedance mismatch occurs in radar propagation?
• Which consequence results when steric hindrance distorts molecular orbitals?
• Which outcome results when the intake valve is late closing in an internal combustion engine cycle?