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1 Primary & Middle School Mathematics1–9 年级在线 2 High School Mathematics10–12 年级在线 3 University Mathematics — Year 1本科一年级在线 4 University Mathematics — Year 2本科二年级在线 5 University Mathematics — Year 3本科三年级在线

1 Primary & Middle School Physics1–9 年级在线 2 High School Physics10–12 年级在线 3 University Physics — Year 1本科一年级在线 4 University Physics — Year 2本科二年级在线 5 University Physics — Year 3本科三年级在线

1 School Chemistry — Grades 1 to 121–12 年级在线 2 University Chemistry — Year 1本科一年级在线 3 University Chemistry — Year 2本科二年级在线 4 University Chemistry — Year 3本科三年级在线

1 Primary & Middle School Biology1–9 年级在线 2 High School Biology10–12 年级在线 3 University Biology — Year 1本科一年级在线 4 University Biology — Year 2本科二年级在线 5 University Biology — Year 3本科三年级在线

1 Primary & Middle School Earth and Space Sciences1–9 年级在线 2 High School Earth and Space Sciences10–12 年级在线 3 University Earth and Space Sciences — Year 1本科一年级在线 4 University Earth and Space Sciences — Year 2本科二年级在线 5 University Earth and Space Sciences — Year 3本科三年级在线

1 Markets I: The Ecosystem and Exchange-Traded Markets市场在线 2 Markets II: Rates, FX and Credit市场在线 3 Markets III: Commodities, Energy and Crypto市场在线 4 Quantitative Methods方法在线 5 Derivatives and Volatility衍生品在线 6 Rates, Credit, XVA and Risk利率、信用与风险在线 7 Research Craft: Predictors, Backtests, Measurement, Portfolios研究在线 8 Strategies I: Equities and Futures策略在线 9 Strategies II: Volatility, Relative Value, Macro and the Bank Desks策略在线 10 Microstructure and Execution交易执行在线 11 Market Making and High-Frequency Trading做市在线 12 Machine Learning for Markets机器学习在线 13 Low-Latency Software技术在线 14 Networks, Hardware and Trading Infrastructure技术在线 15 Research, Data and Risk Platforms技术在线 16 The Desk and the Firm公司运营在线 17 The Industry: Firms, Roles and Careers职业发展在线 18 Interviews I: Maths, Probability and Speed职业发展在线 19 Interviews II: Markets, Trading Games and the Final Round职业发展在线 20 Interviews III: Code职业发展在线

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Physics · 术语表

什么是 Gas？

Definition 14.6 Primary & Middle School Physics · 第 14 章 — Solids, Liquids, Gases

A gas is stuff that spreads out to fill all the room it is given. Air is a gas: put it in a bottle, it fills the bottle to every corner; open the bottle in a bigger room, and it spreads through that too. A gas has neither its own shape nor its own resting place — offer it more room, and it takes everything.

A gas on the loose: released in one corner, it spreads until it fills the whole room.

Most gases are invisible — but not all. This sealed glass tube holds bromine, a gas with a real brown-orange color: you can see it filling every corner of its container, right up to the glass. Photo: James St. John, CC BY 2.0 (cropped). — Most gases are invisible — but not all. This sealed glass tube holds bromine, a gas with a real brown-orange color: you can see it filling every corner of its container, right up to the glass. Photo: James St. John, CC BY 2.0 (cropped).

示例

Example 14.7 (The traveling perfume)

Someone opens a perfume bottle at one end of the room. A moment later, noses at the other end notice it. The perfume gas did not stay politely near its bottle: released, it spread through all the air of the room, corner to corner — exactly what the gas family always does.

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