1、chapter 2: matter is made up of atomsearly ideas about matter greek philosophers (2500 y.a.) proposed matter was made of 4 elements: earth, air, fire, water. they coined the word “atom” meaning cannot be broken.“modern” atomic theory lavoisier (1743-94) law of conservation of ...
The light stays off, so you might think that silicon's an insulator. But it did not end, what if I heat it up? It lights up. 硅在室温下是绝缘的,而在高温下是导电的。所以它是半导体,它的导电性取决于环境的变化。这种特殊的能力使半导体成为电子设备的完美“大脑”。小型半导体开关电路,称为...
Science has led to the development of new materials. For example, carbon fiber is a strong and lightweight material that is used in many industries. Carbon fiber is made up of ___. A. carbon atoms only B. carbon and oxygen atoms C. carbon and hydrogen atoms D. carbon and nitrogen at...
All matter is made up of atoms is a recognized fact 翻译结果2复制译文编辑译文朗读译文返回顶部 正在翻译,请等待... 翻译结果3复制译文编辑译文朗读译文返回顶部 All matter consists of atoms is accepted fact 翻译结果4复制译文编辑译文朗读译文返回顶部 All the material is formed by atoms is an accepted...
Everything we see is made up 我们看到的每样东西 of tiny, indivisible bits of stuff called atoms. 都由微小、看不见的东西组成, 这东西称作原子。 This theory is simple and elegant, 这个理论既简单又优雅, and it has the advantage 而它超越 土、空气、水、火的理论 ...
经典例题: Any substance is made up of atoms whether it is a solid,a liquid,or a gas. 参考译文 任何物质,无论它是固体、液体或气体,都是由原子构成的。 (2)代词的省略 经典例题: The desert animals can hide themselves from the heat during the daytime. 参考译文: 沙漠中的兽类能躲避白天的炎...
Photons: Photons are individual light particles used to send quantum information across long distances through optical fiber cables and are currently being used in quantum communication and quantum cryptography. Neutral atoms: Commonly occurring neutral atoms charged with lasers are well suited for scaling...
This picture of an atom is a long-exposure shot, which means even with all that laser light, it’s still too faint to pick up without equipment. But given how incredibly tiny atoms are, looking at this photo is probably the closest you’re going to get. Before You Go ... What Are...
or gas made up of atoms that become excited when energized and then emit light. In the first laser, the medium was a rod of synthetic ruby wrapped in the coil of a xenon lamp. At either end of the rod were mirrors – one of which was only half silvered, so if the light was inten...
Laser is a a guiding light for atoms. (rubidium atoms guided through optical fiber)(Research News: Optics)Service, Robert S