It plays a big role in gravitation, in the Coulomb interaction.

它在引力和库仑力中都起着重要的作用

耶鲁公开课 - 基础物理课程节选

PROFESSOR: And this is a question based on where we left off on Wednesday -- we were talking about Coulomb's force law to describe the interaction between two particles and good job, most of you got this correct.

教授：这是我们上次最后,留下的问题-我们讲到,描述粒子间相互作用的,库伦定律，很好,大部分人都做对了。

麻省理工公开课 - 化学原理课程节选