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Osmosis-心血管

Again, the bigger the dipole, the bigger the negative deflection.

同样,双极子(压差值)越大,负向波形也就越大。

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TED演讲(视版) 20174月合集

And they're putting together these radio dipoles.

他们正在组装这些无线偶极子。

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可汗学院:生物化学

So each molecule has a dipole moment.

所以每个分子都有一个偶极矩。

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化学 Crash Course

Water and its useful little dipole moment can dissolve more compounds than any other chemical on Earth.

水及其有用小偶极矩可以溶解比地球上任何其他化学物质更多化合物。

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Crash Course Physics 速成课物理

This pair of particle is known as an electric dipole.

这对粒子被称为偶极子 ”。

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TED-Ed(视版)

Because of the resulting asymmetry in charge distribution, the dipoles no longer cancel each other out.

由于由此产生荷分布不对称,偶极子不再相互抵消。

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TED-Ed(视版)

Normally, these dipoles cancel each other out, so there's no net separation of charge in the unit cell.

通常情况下, 这些偶极子会相互抵消,因此晶中不会出现净荷分离。

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Osmosis-心血管

If we unpause this, then everything becomes depolarized, and since there's no difference in charge, now, there's no dipole, and so no deflection.

如果我们这时将其“解冻”,那么所有细都被去极化了,由于细荷没有变化,所以没有双极子,(心图)上也就不存在任何波形(呈一条直线)。

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Crash Course Physics 速成课物理

So in our electric dipole the lines start at the positively charged particle and move toward the negatively charged one.

双极性中,线开始于 粒子带正并趋向于负粒子。

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Crash Course Physics 速成课物理

If the magnitude of the positive charge in our electric dipole is doubled, then twice as many lines leave the positive point charge.

如果偶极子荷加倍,它离开 正点荷线数两倍。

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TED-Ed(视版)

The oxygens have a slight negative charge and silicons have a slight positive, creating a separation of charge, or a dipole along each bond.

氧带有轻微荷, 硅带有轻微荷,形成荷分离,或沿每个键形成偶极子。

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Osmosis-心血管

Now, if there's a dipole vector pointing toward the positive electrode, then the ECG tracing shows it as a positive deflection - the bigger the dipole, the bigger the deflection.

现在,如果有一个双极子向量指向正极,那么心图上显示出来就是一个正向波形,双极子(正负荷差值)越大,波形也就越大。

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Crash Course Physics 速成课物理

Magnetic sources are always dipoles, with a north and south pole, and magnetic field lines that leave from the north pole and return back to the south.

磁源始终是偶极子,具有北极和南极,以及离开北极并返回南极磁力线。

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Osmosis-心血管

Pausing halfway through again, now the vector dipole goes in the opposite direction, and faces the negative electrode, which means there will be a negative deflection on the ECG tracing.

在流经一半时再次“冻结”定格,现在双极子向量会指向相反方向,对着负极,这意味着在心图上会显示出一个负向波形。

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Crash Course Physics 速成课物理

And for an electric dipole – which is one positive point charge and one negative point charge – the electric potentials from individual charges can be added together.

对于由两个荷组成偶极分子 正负分,每个势可以相加。

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Osmosis-心血管

The ECG tracing shows a depolarization wave moving towards an electrode as a positive deflection, and one moving away as a negative deflection, each of which is proportional to the size of the dipole.

在心图上,向正极移动除极波显示为正向波形(向上偏转),远离正则显示为负向波形(向下偏转),波形大小与双极子(压差值)大小成正比。

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化学 Crash Course

Ionic solids are basically just polarity taken to the extreme, so far that instead of having a partial positive and partial negative dipole moment, the electrons have completely transferred, creating two charged ions.

离子固体基本上只是极端极性,到目前为止, 子已经完全转移, 而不是具有部分正偶极矩和部分负偶极矩, 从而产生两个带离子。

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化学 Crash Course

In order for a molecule to be polar, there has to be a dipole moment, a separation of the charge around the molecule into a more positive area and a more negative area.

为了使分子具有极性,必须存在偶极矩,将分子周围荷分离为更正区域和更负区域。

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化学 Crash Course

As you should recall from our lesson on polar and non-polar molecules, a dipole is a separation of charges, like areas of partial positive and partial negative in a polar molecule such as water.

你应该记得我们关于极性和非极性分子课程, 偶极子是分离,就像极性分子(如水)中部分正和部分负区域一样。

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化学 Crash Course

You also learned how to notate a dipole moment or charge separation of a molecule, the actual physical mechanism behind " like dissolves like" , and why water is just so dang good at fostering life on this planet.

您还学习了如何记下分子偶极矩或荷分离、“同类相溶”背后实际物理机制,以及为什么水在培育这个星球上生命方面如此出色。

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