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物理 高校生

(ウ)の問題で L進めむごとに立方体の側面に衝突すると思うのですがなぜ1往復で1回しか衝突しないのですか?

247 気体分子の運動 一辺の長さLの立方体の容器に質 量m (kg単位) の気体分子がN個入っている。 図のように座標軸 をとるとき 以下の文中のに適当な式を入れよ。 (1) 1個の分子が図のなめらかな壁面Aに x方向の速度成分 vx で 弾性衝突したとき,分子の運動量の変化はアなので,壁 面Aに与える力積はイである。この分子は時間の間に ウ 壁面Aと衝突するので,この分子によって壁面Aが 受ける平均の力の大きさはf=エである。 24 L A (2) 全分子の速度の2乗の平均値を三平方の定理を用いて各成分の2乗の平均値で表 すと2x2+vy2+v22 であり, 等方性より全分子は平均的に2 ので,エを用いてN個の分子が, 壁面Aに与える力をを用いて表すと F=オ となる。したがって,壁面Aにはたらく圧力はp=カである。 (3)状態方程式 V =nRTとカを比較すると,分子1個の平均運動エネルギー Eはアボガドロ定数 N (物質量 n=N/Na),気体定数R, 絶対温度T を用いて表す ととなる。ここでN個の分子の質量が分子量Mo (g単位)であること を考慮すれば,キより分子の二乗平均速度は, Mo, R, T を用いて ク と表される。 例題 44259 '

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英語 高校生

写真の黄色い線の部分の文構造を教えていただきたいです🙇 また、 ①ifは「ーかどうか」で訳していいのか ②thisは何を指しているか ③itは何を指しているか も教えていただきたいです。 よろしくお願いします💦

Phil Hello. This is 6 Minute English from BBC Learning English. I'm Phil. Beth And I'm Beth. Phil So, Beth, we're talking about the best education systems in the world today. You went to school here in Britain. What do you think of the British education system? Do you think it could be the best? Beth I think that it's quite good, there's probably a couple of things that I personally would change about it, but I would say it's quite good, but maybe not the best in the world. Phil Well, in this programme, we're going to be talking about the Pisa rankings. Beth The rankings are based on tests carried out by the OECD, that's an international organisation, every three years. The tests attempt to show which countries are the most effective at teaching maths, science and reading. But is that really possible to measure? Well, here is former BBC education correspondent Sean Coughlan talking to BBC World Service programme 'The Global Story'. Sean Coughlan When they were introduced first of all, that was a very contentious idea, because people said 'how can you possibly compare big countries... how can you compare America to Luxembourg or to, you know, or to parts of China, or whatever?' Phil Sean said that the tests were contentious. If something is contentious, then it is something that people might argue about it's controversial. So, at first, Pisa tests were contentious because not everyone believed it was fair to compare very different countries. Beth Phil, I've got a question for you about them. So, in 2022, Singapore was top of the reading rankings. But which of these countries came second? Was it: a) The USA? b) Ireland? or, c) The UK? Phil I think it might be b) Ireland. Beth OK. Well, we will find out if that's correct at the end of the programme. A common pattern in the Pisa rankings is that the most successful countries tend to be smaller. Talking to BBC World Service programme 'The Global Story', Sean Coughlan tells us that many large countries from Western Europe don't score that highly in the rankings. Sean Coughlan They're being outpaced and outperformed by these fast, upcoming countries - you know, Singapore, or Estonia, or Taiwan, or those sort of places which we don't historically think of as being economic rivals, but I suppose the argument for Pisa tests is, if you want to have a knowledge economy, an economy based on skills, this is how you measure it. Phil We heard that many large European countries are being outpaced by smaller nations. If someone outpaces you, they are going faster than you - at a higher pace.

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