It also had an extremely low coefficient of friction, making other materials slide right off it.

它还有一个非常低的摩擦系数，让其他物质都从它旁边滑走。

Bo, tell me more about the coefficient of friction.

Bo, 告诉我更多关于摩擦系数的信息。

And this number right here, this is called the coefficient of determination.

这个数字就在这里，这叫做决定系数。

It has what's called a high coefficient of thermal expansion, which means that when you heat it up a little, it expands a lot.

它具有所谓的高热膨胀系数，这意味着当你稍微加热它时，它会膨胀很多。

Also, for two surfaces, the coefficient of static friction is almost  always more than the coefficient of kinetic friction.

此外，对于两个表面，静摩擦系数几乎总是大于动摩擦系数。

So the derivative of this with respect to m, it's kind of the coefficients on the m.

所以这个关于 m 的导数，它是 m 上的系数。

That's its coefficient of volume expansion -- represented by the Greek letter beta.

什么程度的人声膨胀...女演员 带有希腊字母 beta。

You also happen to know that the coefficient of static friction between the box and the ramp is 0.50.

你也意识到摩擦的程度 盒子和斜坡之间的静态是 0。50。

The more heat the fridge removes for a given amount of work, the higher the coefficient of performance.

冰箱带走的热量越多 执行特定工作时，性能因素越高。

And the maximum force of static friction is just equal to the coefficient of static friction times the normal force.

最大静摩擦力为 静摩擦力乘以法向力的程度。

And of course, a real-life refrigerator can't have a higher coefficient of performance than an ideal refrigerator.

当然，没有真正的冰箱可以拥有 比理想冰箱更高的性能系数。

And to do that we have to think of the coefficients of our equation as a, b, and c in that order.

为此，我们必须按顺序将方程式的系数视为 a、b 和 c。

Think of like an imaginary reaction A plus B yields C plus D. The lower case letters represent the coefficients of the reactants and products.

想象一个假想的反应 A 加 B 产生 C 加 D。小写字母代表反应物和产物的系数。

The equation then is the force of static  friction is less than or equal to the coefficient of static friction times the force normal.

那么方程就是静摩擦力小于或等于静摩擦系数乘以法向力。

The coefficient of friction has no units, cannot be negative, is typically in the range of  somewhere between 0 and 2, and is experimentally determined.

摩擦系数没有单位，不能为负数， 通常在 0 到 2 之间的某个范围内，并且是通过实验确定的。

The only other thing that the change in length depends on is that coefficient of linear expansion, represented by the Greek letter alpha.

唯一的其他变化取决于 长度是线性膨胀的程度，用 alpha 表示。

They would tell my dad something like, 'This is what we want, and we want it out of one piece of metal so that the coefficients of expansion are all the same.'

工程师们会对我爸爸说，‘这就是我们想要的，我们还想要用一整块金属板一体成型来保证膨胀系数的一致。’

And if this whole thing is close to 1, the whole coefficient of determination, the whole R-squared, is going to be close to 0, which makes sense.

如果这整个事情接近 1，整个决定系数， 整个 R 平方， 将接近 0， 这是有道理的。

The equation for volume expansion just says that the change in volume is equal to the coefficient of volume expansion, times the initial volume, times the change in temperature.

体积膨胀方程只是说体积变化等于体积膨胀系数乘以初始体积再乘以温度变化。

And the equation that we use to describe linear expansion, says that the change in length is equal to what's known as the coefficient of linear expansion

以及我们用来描述线性膨胀的方程 就是长度的变化等于线膨胀的程度。