Question

select the correct answer. which condition in a nebula would prevent nuclear fusion? a. the presence of nitrogen and carbon b. the unification of gaseous elements c. a decrease in the overall volume of gases d. a core temperature of only ten thousand kelvin e. physical contact between bare nuclei

Explanation:

Nuclear fusion in a nebula requires extremely high temperatures (millions of Kelvin) to overcome the electrostatic repulsion between positively - charged nuclei. A core temperature of only ten thousand Kelvin is too low to initiate and sustain nuclear fusion. The presence of nitrogen and carbon (A) does not prevent fusion as they can be part of the later - stage stellar processes. The unification of gaseous elements (B) is a step towards star formation and fusion. A decrease in gas volume (C) can increase density and potentially aid fusion. Physical contact between bare nuclei (E) is what fusion is about and is facilitated by high temperatures and pressures.

Answer:

D. a core temperature of only ten thousand Kelvin