What natural barrier tries to prevent two protons from combining?
A) Dark energy
B) Antigravity
C) Electromagnetic repulsion
D) The weak nuclear force
E) The strong nuclear force
Answer: C
What natural barrier tries to prevent two protons from combining?
A) Dark energy
B) Antigravity
C) Electromagnetic repulsion
D) The weak nuclear force
E) The strong nuclear force
Answer: C