Out of the floating material that was left over, two microscopic grains floated close enough together to be joined by electrostatic forces.

在剩下的飘浮物质当中，两颗微粒飘到很近的地方，被静电吸到一起。

Maybe it was a big dustball held together by electrostatic forces — a bit like a supersized version of the dust bunnies under your couch.

也许它是个由静电力聚合成的大尘埃球——就像你沙发下尘埃团的超大版本。

And it can be very strong, this electrostatic force, so they stick to each other.

这种静电力非常强，所以它们会粘在一起。

But the electrostatic forces can be either attractive or repulsive, depending on the signs of the charges.

但是静电力可以是吸引的也可以是排斥的， 这取决于电荷的符号。

When voltage is applied, these nanotubes produce an electrostatic force, causing the rubber cylinder to elongate and contract.

当施加电压时， 这些纳米管产生静电力，导致橡胶圆柱体伸长和收缩。

Today, we learned about electrostatic forces, and how electrical charge can be altered and rearranged.

今天我们学习了力量 静电和如何。

The electric field equals the electrostatic  force divided by the charge on the small, positive test charge.

电场等于静电力除以小正测试电荷上的电荷。

Now, gravitation and electrostatic forces work in totally different ways, of course, so we have to express them differently, too.

重力和静电力 当然，它以不同的方式工作。

So, from a simple trick with tape, and the help of a couple of animated rods, we’ve already uncovered the basics of electrostatic forces!

所以，通过一个简单的胶带技巧， 以及几根动画棒的帮助， 我们已经了解了静电力的基础知识！

So, from a simple trick with tape, and the help of a couple of animated rods, we've already uncovered the basics of electrostatic forces!

所结果的。所以，借助一个简单的技巧 用胶带和一对木棍！

Also, notice that a positively charged particle  moving through a constant electric field like this will experience an electrostatic force  in the direction of the electric field.

另外，请注意，带正电的粒子在这样的恒定电场中移动时，将会在电场方向上受到静电力。

That is 24 orders of magnitude bigger, so any effect of gravity is lost down in the twenty fourth decimal place of the electrostatic force, an incredibly small effect.

这比它大了24个数量级，所以任何重力效应都会在静电力的小数点后二十四位消失，这是一个非常小的影响。

Yeah, Coulomb's law gives the electrostatic force  as the Coulomb constant times charge 1 times charge 2 all divided by the square of the distance  between centers of charge all times unit vector r.

是的，库仑定律给出的静电力等于库仑常数乘以电荷 1 乘以电荷 2 除以电荷中心之间距离的平方乘以单位矢量 r。