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英語 高校生

この英語長文において、印刷技術の発達に必要な技術はどのようなものであるか50~200字で答えてください

木版画 鋳造 第3問 以下の文は、 S. Strandh の “Machines, an illustrated history" からの抜粋で ある。 次の文を読んで、設問に解答せよ。 (ア) The tools of precision mechanics were, without doubt, the technical pre conditions for making wood cuts and for the development of printing. The oldest dated wood engraving is from 1418. It shows fine lines throughout 細部 and a richness of detal, which imply that the tools used, the knives, burins, and so on, must have been eminently suitable At this time, it was only the precision mechanics of clock making which could achieve the technique required for such tools. 精密機械技術 (イ) A (woodcut was produced by transferring a drawing, reversed from left to right, onto a carefully surface-ground "block" of wood, after which the surface wood on either side of each line in the drawing was cut away with a burin of forged steel. The remaining wood on all 'surfaces which were to be white in the drawing were then cut away with gravers and gouges, so that the lines of the drawing became raised. They were then inked and pressed against paper. これは 理由では ないから、 (~のときに、何 が原因か は不明) The woodcut method spread rapidly in the late Middle Ages when pictures were rarity. At first, skilful craftsmen made the woodcuts, but before long, eminent artists were themselves cutting their own drawings in wood. One of the first was the German Albrecht Duerer (1479-1528) who, in 1498, published the famous pictorial series of the Revelation of St. John. Graphics had become an independent art form-based on the progress of precision 酒の mechanics! 可動式の The 1440s saw the first book printed with movable die-cast type. (The letter press printing method used by Johann Gutenberg (1399?-1468) was basically the same as the one used for printing woodcuts, but Gutenberg used cast, movable type instead of cut blocks. The production of dies for the type was made possible by the tools of precision mechanics, too. It does not detract from Gutenberg's contribution that printing with movable type has been practised in the Far East, or more specifically Korea, two thousand years prior to this. Several of the techniques described here, which developed so quickly during the technical revolution of the Renaissance, had had predecessors in other parts of the world. ' 金楼 にねじ を刻む 道具 ~をなら K あったもの

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化学 高校生

化学基礎の質問です! (3)はそれぞれ何がたされているのかを 分かりやすく教えてほしいです!! よろしくおねがいします🙇🏻‍♀️՞

ただ 176. 酸化還元反応式のつくり方 硫酸酸性の過マンガン酸カリウム KMnO 水溶液に、 硫酸鉄(ⅡI)水溶液を加えると, マンガン(II)イオン Mn²+ と鉄(ⅢII)イオン Fe' + が生成 した。 この反応について、次の各問いに答えよ。 (1) MnOe²の変化を電子e を用いた反応式でそれぞれ表せ。 (2) MnO と Fe2+ の反応を、イオン反応式で表せ。 (3) 過マンガン酸カリウムと硫酸鉄(ⅡI) の反応を、化学反応式で表せ。 +4のままで変化しておらず, SO2 は酸化剤としても還元剤としても働 いていない。この反応では,どの原子も酸化数は変化していない。 (エ)ヨウ素を含む水溶液に二酸化硫黄を吹きこむと,次の反応がおこり、 ヨウ化水素と硫酸が生じる。 I2+SO2+2H2O→2HI+H2SO4 +4 +6 この反応では, SO2 は H2SO4 に変化しており, S原子の酸化数が+4か ら +6に増加しているので, SO2 は還元剤として働いている。このとき I2 のI原子の酸化数は0から-1に減少しており, I2 は還元されている。 176. 酸化還元反応式のつくり方・・ 解答(1)MnO4- +8H+ +5e Fe2+ ENEY - → Fe3+ +¯ (2) MnO +8H+ + 5Fe2+ → (3) 2KMnO4+8H2SO4 +10FeSO4 Mn²+ +4H2O Mn²+ + 5Fe3+ +4H2O — K2SO4+2MnSO4+5Fe2(SO4)3 +8H2O 第Ⅱ章 SAME 201 Ton

解決済み 回答数: 1