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物理 大学生・専門学校生・社会人

流体力学の最初の最初、ラグランジュ微分のところでつまづいて困っております。 二枚目の?をつけた計算過程はどのような微分なのでしょうか? よろしくお願いします。

の1 流れの運動学 8 1 = (u.V)u U のようにして得られた. 記号▽はナブラ (nabla) とよみ 0 鶏分(1.14) 0 マ= e』 + ey Oy 0z のように定義される演算子 (operator) であるす. ea, ey. Ez はそれぞれ』軸, 軸,2軸の正の向きに向かう単位ベクトル (unit vector) で, これらを基本ベク トル (fundamental unit vector)という。 式(1.12) の両辺を At でわって, At →0 の極限をとると,流体粒子の受け る加速度a(z,t) を求めることができ に Au a(x, t) = lim + (u-V) u(z, t) At→0 At Ot D -u(x,t) Dt となる.ただし D +u.V Ot Dt で,D/Dt をラグランジュ微分 (Lagrangian derivative),あるいは実質微 分(substantial derivative), あるいは物質微分 (material derivative) という。 Du/Dt= Ou/0t+ (u.V)uの右辺第1項は, 流体中のある点aをつぎつぎと 通過する流体粒子の速度の時間的変化の割合を表しており,局所加速度 (local acceleration) とよばれている. また第2項は,点cにある流体粒子がある瞬間 にその前後の流体粒子の速度差のために受ける速度の時間的変化割合で対流加 速度 (convective acceleration) とよばれている。 ラグランジュ微分 D/Dtは, オイラーの方法の意味で »とtの関数として表 された量,すなわち 「場の量」に対してのみ作用させることができる. なぜな ら,その定義式(1.16) の右辺は, 独立変数を αとtとするときの偏微分0/0tと ▽によって構成されているからである. aとtの任意関数 f(z,t) のラグラン ジュ微分は,式(1.15) を導いた過程から理解できるように, 流れに伴う f(x.t) の時間的変化の割合,すなわち, 流体粒子の軌跡に沿っての f(z,t) の時間的変 化の割合を表す。 十演算子▽をスカラー関数f(a)に作用させて得られるVfは, f の勾配 (gradient) とよばれ る。▽をスカラー関数に作用させたときは▽の代わりに grad という記号を使ってもよい。す なわち, ▽f=gradf. 後に述べるように, ▽をベクトルとみなしてベクトル関数に作用させ る(内積をとる)ときは, 記号 gradは使わない、ただし、式(1.13) の▽は grad を使って書 くことができる。

解決済み 回答数: 1
英語 高校生

英語に自信がある人回答づくりお願いします! ※書き込みは気にしないでください。 これプラス、問題に続きがあって、 問5 本文には、実物の動物を見ることによって人々がより深く理解できることが3つ書かれています。それらを日本語で答えなさい。 問6 本文には、動物園... 続きを読む

第4問 次の英文を読んで、 設問に答えなさい。①~6は段落番号です。 黒体 6) のIn my view, (1)it_is perfectly possible for many species of animals living in gon.. ie parks to have a quality of life as high as, or higher than, in the wild. 'Animals in ood z0os get a varied and high-quality diet with all the supplements required. and anv 1pesses they might have will be treated.Their movement might be somewhat restricted. mt they have a safe environment in which to live, and they are spared bullying and social 神年 predators*2 or the irritation and pain of parasites or injuries. The average captive animal racism*1 by others of their kind. They do not suffer from the threat or stress of will have a greater life expectancy compared with its wild counterpart, and will not die of drought, of starvation or in the jaws of a predator. Alot of very nasty things happen to truly wild' animals that simply don't happen in good zoos, and to view a life that is 'free' as 術保者一 one that is automatically ‘good' is, I think, an error. Furthermore, zoos serve several key purposes. の Firstly, zoos aid conservation. Colossal numbers of species are becoming extinct across the world, and many more are increasingly threatened and therefore risk extinction. Moreover, some of these collapses have been sudden, dramatic and unexpected, or were simply discovered very late in the day. Aspecies protected in captivity can be bred up to provide a reservoir*3 population against a population crash or extinction in the wild. A good number of species only exist in captivity, with many ofthese livinginzoos. Stillmore only exist in the wildbecause they have been reintroduced from zoos, or have wild populations that have been1o0osted by captive bred animals Without (2these efforts there would be fewer species alive today. Although reintroduction successes are few and far between*4, the numbers are increasing, and the very fact that species have been saved or reintroduced as a result of captive breeding proves the value of such initiatives. ③ Zoos alsoprovide education. Many children and adults, especially those in cities, will never see a wild animal beyond a fox or pigeon. While it is true that television documentaries are becoming ever more detailed and impressive, and many natural history specimens are on display in museums, there really is nothing to compare with seeinga living creature in the flesh*5, hearing it, smelling it, watching what it does and having the time to absorb details. That alone will bring a greater understanding and perspective to many, and hopefully give them a greater appreciation for wildlife, conservation efforts and how they can contribute. ④ Inaddition to this, there isalsothe education that cantake place in Z0Osthrough signs, talks and presentations which directly communicate information to visitors about the animals they are seeing and their place in the world. This was an area where zoos used to be lacking, but they are now increasingly sophisticated in their communication and 8.

回答募集中 回答数: 0
英語 高校生

英語に自信がある人回答づくりお願いします! ※書き込みは気にしないでください。 これプラス、問題に続きがあって、 問5 本文には、実物の動物を見ることによって人々がより深く理解できることが3つ書かれています。それらを日本語で答えなさい。 問6 本文には、動物園... 続きを読む

第4問 次の英文を読んで、 設問に答えなさい。①~6は段落番号です。 黒体 6) のIn my view, (1)it_is perfectly possible for many species of animals living in gon.. ie parks to have a quality of life as high as, or higher than, in the wild. 'Animals in ood z0os get a varied and high-quality diet with all the supplements required. and anv 1pesses they might have will be treated.Their movement might be somewhat restricted. mt they have a safe environment in which to live, and they are spared bullying and social 神年 predators*2 or the irritation and pain of parasites or injuries. The average captive animal racism*1 by others of their kind. They do not suffer from the threat or stress of will have a greater life expectancy compared with its wild counterpart, and will not die of drought, of starvation or in the jaws of a predator. Alot of very nasty things happen to truly wild' animals that simply don't happen in good zoos, and to view a life that is 'free' as 術保者一 one that is automatically ‘good' is, I think, an error. Furthermore, zoos serve several key purposes. の Firstly, zoos aid conservation. Colossal numbers of species are becoming extinct across the world, and many more are increasingly threatened and therefore risk extinction. Moreover, some of these collapses have been sudden, dramatic and unexpected, or were simply discovered very late in the day. Aspecies protected in captivity can be bred up to provide a reservoir*3 population against a population crash or extinction in the wild. A good number of species only exist in captivity, with many ofthese livinginzoos. Stillmore only exist in the wildbecause they have been reintroduced from zoos, or have wild populations that have been1o0osted by captive bred animals Without (2these efforts there would be fewer species alive today. Although reintroduction successes are few and far between*4, the numbers are increasing, and the very fact that species have been saved or reintroduced as a result of captive breeding proves the value of such initiatives. ③ Zoos alsoprovide education. Many children and adults, especially those in cities, will never see a wild animal beyond a fox or pigeon. While it is true that television documentaries are becoming ever more detailed and impressive, and many natural history specimens are on display in museums, there really is nothing to compare with seeinga living creature in the flesh*5, hearing it, smelling it, watching what it does and having the time to absorb details. That alone will bring a greater understanding and perspective to many, and hopefully give them a greater appreciation for wildlife, conservation efforts and how they can contribute. ④ Inaddition to this, there isalsothe education that cantake place in Z0Osthrough signs, talks and presentations which directly communicate information to visitors about the animals they are seeing and their place in the world. This was an area where zoos used to be lacking, but they are now increasingly sophisticated in their communication and 8.

回答募集中 回答数: 0
英語 高校生

英語に自信がある人回答づくりお願いします! ※書き込みは気にしないでください。 これプラス、問題に続きがあって、 問5 本文には、実物の動物を見ることによって人々がより深く理解できることが3つ書かれています。それらを日本語で答えなさい。 問6 本文には、動物園... 続きを読む

第4問 次の英文を読んで、 設問に答えなさい。①~6は段落番号です。 黒体 6) のIn my view, (1)it_is perfectly possible for many species of animals living in gon.. ie parks to have a quality of life as high as, or higher than, in the wild. 'Animals in ood z0os get a varied and high-quality diet with all the supplements required. and anv 1pesses they might have will be treated.Their movement might be somewhat restricted. mt they have a safe environment in which to live, and they are spared bullying and social 神年 predators*2 or the irritation and pain of parasites or injuries. The average captive animal racism*1 by others of their kind. They do not suffer from the threat or stress of will have a greater life expectancy compared with its wild counterpart, and will not die of drought, of starvation or in the jaws of a predator. Alot of very nasty things happen to truly wild' animals that simply don't happen in good zoos, and to view a life that is 'free' as 術保者一 one that is automatically ‘good' is, I think, an error. Furthermore, zoos serve several key purposes. の Firstly, zoos aid conservation. Colossal numbers of species are becoming extinct across the world, and many more are increasingly threatened and therefore risk extinction. Moreover, some of these collapses have been sudden, dramatic and unexpected, or were simply discovered very late in the day. Aspecies protected in captivity can be bred up to provide a reservoir*3 population against a population crash or extinction in the wild. A good number of species only exist in captivity, with many ofthese livinginzoos. Stillmore only exist in the wildbecause they have been reintroduced from zoos, or have wild populations that have been1o0osted by captive bred animals Without (2these efforts there would be fewer species alive today. Although reintroduction successes are few and far between*4, the numbers are increasing, and the very fact that species have been saved or reintroduced as a result of captive breeding proves the value of such initiatives. ③ Zoos alsoprovide education. Many children and adults, especially those in cities, will never see a wild animal beyond a fox or pigeon. While it is true that television documentaries are becoming ever more detailed and impressive, and many natural history specimens are on display in museums, there really is nothing to compare with seeinga living creature in the flesh*5, hearing it, smelling it, watching what it does and having the time to absorb details. That alone will bring a greater understanding and perspective to many, and hopefully give them a greater appreciation for wildlife, conservation efforts and how they can contribute. ④ Inaddition to this, there isalsothe education that cantake place in Z0Osthrough signs, talks and presentations which directly communicate information to visitors about the animals they are seeing and their place in the world. This was an area where zoos used to be lacking, but they are now increasingly sophisticated in their communication and 8.

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化学 高校生

【英語ですみません🙇‍♂️】9,10,11,12で、どれがorganized, reduced なのか教えていただきたいです🙏 6,7,8は分かったのですが、下はよく理解できませんでした説明お願いします。。

6. reaction of nitrogen gas with hydrogen 82S 2 NH.(⑧ N@ 3 HH@ グ 太 El cxidized N reduced 旧 ineral o7g7coc76) 7. production ofcopper metal fom its sulfide as found in rocks (Cu。S, the miner2 2 SO,⑮ CuSG) + O,@ つ 2 Cu⑮ ky ィ N +| っ の ケ 1 oxidized 。S redueed Cu () 8。 elemental bromine can be cxtracted from seawater using chlorine ga 2 Brの Ss 09 っ mg + CMの ー| 選 の | oxidized Br reduced C% OrganismSigetitheir energy by COndHGHilFGGOXIEGHGHONSING “harvesting2 the energy released』軸heyineed (1) something to oxidize (an electron donor whichis theirfood) ②⑫) Somefhmgt6 oxidize it with (am electron acceptorleigl 0 ) 2. Here js an example ofa food molecule (glucose) being oxidized by oxygen in your body CHi。0。(くの 店 6 0.(<の ーー 。 6CO:(@⑦ 直 6 H0⑰ 辺 ダ +t ゝ 汗(時 oxdized reduced 10. some bacteria use sulfate as their oxidizer (electron acceptor) instead ofO。 mm fhis example, the bacteria are partially oxidizing lactic acid to produce acetic acid NOTE: a fractional oxidation sfate is allowed for carbon @& this is not balanced as written Jacfic acid acetic acid CH。COOH(22) + HO⑦) + SOの つ CHiCOOH(42) + CO,(42⑦) + HS-(の oxidized reduced 11. Bacteria can also use nitrate as (heir electron acceptor. As nitrate gains electrons, it tuns into several other forms. Find the oxjdation state of nitrogen in each of them: which is most reduced and which is mosf oxidized. NO NO N, NHi 4 12. Bactera can use amn1Onium aS an energy SOurce when oxygen 1S Dresent tO Oxidize it、 2NHJ + 90。 ご 2N と 4HO 2 ィ| RI oxidized reduced

解決済み 回答数: 1
TOEIC・英語 大学生・専門学校生・社会人

問5 英語の長文問題です選択式です! よろしくお願いします。

【問5】 次の Global Warming の段落を読んで、その下の英文 (S) が True (正 い) か False (誤り) のどちらか、選びなさい。 AM Global Warmind: All over the world people are talking about global warming. Vorld leaders are meeting to discuss this problem. Why is it such an important ISSU@? f the temperature of the earth rises too much, the polar ice CapS will begin to melt, causing the water level in the oceans to rise. The Intergovernmental Panel on Climate Change (the IPCC) has made Studies which suggest that there could be a one-meter rise in sea levels by the year 2080. No one knows exactly how bad the effect of this rise could be. However, it is thought that roughly 1 billion people who live on coastal land could experience severe impacts. The places most likely to be badly affected by this rise in sea level are tropical and warmer zoness: these are places where the coasts are more highly populated. The most vulnerable regions are located along the southern coast of the Mediterranean Sea, the west coast of Africa, and southern Asian countries like India, Sri Lanka, and Bangladesh. These regions contain some of the poorest, most heavily populated, and highly fertile areas of the world. In these areas, there will be huge problems as people's homes are flooded and qood farming land becomes useless. In the Pacific and Indian Oceans there are many island nations that will cease to exist. About 5 million people will have to move to other countries as the rising seas ruin drinking water and severe storms destroy their homes. The consequences of global warming will be devastating for billions of people. This is not only their problem, but an issue for the world to discuss. Much has to be done before the oceans come ashore. (S): Because of global warming, the temperature of ice and snoW IS increasin9. 〇 A. TRUE (〇) B. FALSE

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