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英語 高校生

広島大学の二次試験対策について質問です。 去年から新しく2個の資料から問題を解く形式に変わりました。慣れるために問題を解きたいんですが、去年の分しかありません(TT) 2個の資料を用いて問題を解いていく形式の長文がある大学の過去問を知っていたら、教えて欲しいです! ↓写真... 続きを読む

(I] Read the following two passages and answer the questions. 資料1 A cave-wall depiction of a pig and buffalo hunt is the world's oldest recorded story, claim archaeologists who discovered the work on the Indonesian island Sulawesi. The scientists say the scene is more than 44,000 years old. The 4.5-metre-long panel features reddish-brown forms that seem to depict human-like figures hunting local animal species. Previously, rock paintings found in European sites dated to around 14,000 to 21,000 years old were considered to be the world's oldest clearly narrative artworks. The scientists working on the latest find say that the Indonesian art predates these. Such artworks are notoriously difficult to date because they can be made with raw materials, such as charcoal(注1), which can be much older than the paintings themselves. But scientists excited the archaeological worid when they reported, in 2014 and 2018, that caves in Sulawesi and Borneo held artworks, including animal paintings, which were older than 40,000 years. The panel seems to depict wild pigs found on Sulawesi and a species of small-bodied buffalo, called an anoa. These appear alongside smaller figures that look human but also have animal traits such as tails and long noses. In one section, an anoa is surrounded by several figures holding spears and possibly ropes. The depiction of these animal-human figures, known in mythology as therianthropes (注 2), suggests that early humans in Sulawesi had the ability to conceive of things that do not exist in the natural world, claim 2 the researchers. The oldest such example from Europe is a half-lion, half-human ivory figure from Germany that researchers have estimated to be 40,000 years old-although Some suggest that it might be significantly younger. A roughly 17,000-year-old painting of a bison chasinga bird-headed human, from Lascaux Cave in France, is considered to be one of the earliest depictions of a clear scene in European rock art. To determine the age of the hunting scene, researchers led by archaeologist Maxime Aubert, at Griffith University, Australia, analysed calcite (注 3) 'popcorn' that had built up on the painting. Radioactive uranium in the mineral slowly decays into thorium. So by measuring the relative levels of different isotopes (往0 of these elements, the researchers were able to determine that calcite on top of one pig began forming at least 43,900 years ago, and deposits (注 5) on two anoas are older than 40,900 years. The dating gives scientists clues about the origins of figurative art. "t has always been assumed that the tradition of figurative painting arose in Europe," says Alistair Pike, an archaeological scientist at the University of Southampton, UK. "This shows the tradition does not have its origins in Europe." But he notes that the researchers dated only the portions of the painting that show animals, so it's possible that the therianthropes were added later. Aubert says the team did not find calcite samples over the therianthropes. Aubert thinks the animals and the therianthropes were painted at the same time. They are of similar colour and weathered in the same way, he notes, and all the other cave art from the region is from the same time period. Archacologist Bruno David, at Monash University in Melbourne, Australia, agrees with Aubert's interpretation. If the entire painting is more than 44,000 years olid, it could mean that early humans arrived in southeast Asia with the capacity for symbolic representation and storytelling. David argues. Archaeologists have already found paint palettes and objects such as eggshells with abstract engravings made by early humans in southern Africa, he adds. “'s probably only a matter of time before narrative paintings of this, and much older age, are found in Africa." (Adapted from Nature, December 11, 2019) (注1) charcoal 木炭 (注2) therianthrope 獣人 (注3) calcite 方解石 (注4) isotope 同位体 (注5) deposit 付着物

解決済み 回答数: 1
物理 高校生

(1)で分子が1回の衝突で受ける力積が負になる理由が分かりません。後➖前で受ける力積が正で与える方が負にならないんですか?

ダーがあり,このシリンダーに単原子分子 N個か ピストン 3 図のように,断熱材で作られた直方体のシリン らなる理想気体が閉じこめられている。1分子の 質量をm (kg)とする。ある分子の速さを[pd/s] とし,この系の状態を分子運動の立場から考える。 シリンダーの断面積はL'[m]であり, ピストン はシリンダー内をなめらかに動く。気体分子は器壁と完全弾性衝突をする。ただし, 分 子の数 Nは十分大きく,ある物理量aの交個の分子についての平均値をくa》と表す ものとし,ボルツマン定数をR (J/K} とする。なお,kは1分子当たりの気体定数に等 シリンダー しい。 [1) ピストンがシリンダーの底から長さ L[m]のところで静止し, 系は熱平衡の状態に ある。ピストンに垂直な右向きにx軸をとり,分子のx方向の速度成分をv, と表す。 (1) ピストンに衝突する1個の分子を考える。1回の衝突でこの分子がピストンに与 える力積を m, v,を用いて表せ。 (2) この分子が1秒間にピストンに衝突する回数 f,もv, Lを用いて表せ。ただし, 分子どうしの衝突は無視できるものとする。 (3) この系の圧助 P{Pa) を N, m, <v?>, Vを用いて表せ。 ただし, V=L° とす R V (re る。 (4) この系の内部エネルギーU[J]を系の絶対温度T{K)および N, )k を用いて表せ。 (2) 次に,ピストンを速ざ vo[m/s)でxの正の向きにゆっくりと移動させる。 (5) ピストンに衝突する「個の分子を考える。1回の衝突によるこの分子の運動エネ ルギーの変化量はいくらか, m, v, voを用いて表せ。ただし, #oがu。に比べ十 分小さいためvo の項は無視できるものとする。 (6) このとき,系の温度の単位時間当たりの変化量 4才を(温度す, 体積Vおよび単 位時間当たりの体積変化量 AVを用いて表すと 27 vV 4T=- となることを示せ。ただし,AV=Lvとする。 また, voがかに比べ十分小さいた め,f。の変化は無視できるものとする。 /万子が1回の衝突さ受る様は 3 一 () +2mue (-mux)-(mvx): -2mlx ;ピストンに与スるカ積は 作用及用の活則まり 2mじx [Ms] 3 2 22 い。 (m Nm<r's MalA p: 3T PT: nRT 4) PIIVYU)

解決済み 回答数: 2