Now this might appear to be a very obvious thing to do, but you'd be surprised how effectiveconstant repetition of quality material can be.
现在这也许已经成为一件显而易见的事，但你会对怎样才能有效的反复重复材料感到惊奇。
2
With this, I can find the effective spring constant of any amount of bubble wrap.
有了这一数据，不论有多少汽泡纸，我们都能够算出它的有效弹性系数。
3
So, if we just rearrange this equation, what we find is that z effective is equal to n squared times the ionization energy, IE all over the Rydberg constant and the square root of this.