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Physics Undergraduate

解き分わからない

【1 】As shown in Figure 1, here ame an object Aof mass AZ B ofmass 7 and Cof mass r On a smooth and horizontal surfce. A and B mre inlerconnected by a spring. The Spring has the naumi lcngth of / and a spring constant た A。 B, and C are on one straight Hime and can move along the stmight line. Tuke the right direction as positive fbr velocity Neglect the mass of the spring and air resistanee 国1に示すように, 水平でなめらかな台の上に質量 /の2つの物体 A, Bと質 基wの物体Cが静止している、A と Bはばね定数たで自然散7 のばねで結ばれ てでいるAB,Cは一直線上にあり, この直線上のを動くものとする. 速度の 向きは図の右向きを正にとるものとする. ばねの質基と空気抵抗は無視できる. (①) A and B are oscillated symmetically so ss for center of mass of A and B imtereonnccted by a spdng to be fixed. Find 7, the Gimc pcriod of the oscillgtion. ばねで千ばれた A と B の重心動かないように, A とB の重心に関して左右対 -称に振動させた場合の周期了を求めよ. Next A and B are atrest. The length of the spring is the natural length / で moving speed yo collides perfect-elastically with A. It is assumed that A and C are rigid, the coHlision occurs very shortly and the displacement during the colision is neglected Moreover iis also assumed tbat after the collision。 A snd C do not have nother の 次に, A と B をばねの長さが自然長 7 になる位置で静止させて, C を左から y の速度で A に衝突させる. この衝突は完全弾性衝突であり, かつ物体が非常に かたくて衝突は極めて短時間に行われ, 衝突中の変位の大きさは無視できるも のとする. さらに, Aと Cは一度笑突した後再びぶつからないものとする- の Find tie velociies yand ycofAand Cimmediaedy Ner he colison。 respectiweiy 衝突直後の A と C の速度w vcを求めよ. ⑬) Find the velocity yoof the cemlerofmassofAand B using が6 and ye 衝後の A と B の重心の束度woを44を用いて表せ (④ Find mc minimum lengtb ofthe pcng sferthe colision ing ヶ。 4 we かた 衝突後, Aと B が最も近接したときのばねの長さを ヵ, 7 w。 4を用いて表せ。 も Hi

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English Senior High

ピンクの部分の並び替えがわかりません

次の英文を読み p.14 の問いに答えなざい。(50 ) ndying a foreign language is in 8ome people think le the best time to begin 隊」 ir /ie /it/ 1earn / to childhood and that/theyoungsr you are the (another amテーーー 3 08886 tomursue languaee st Janguage. While itjis true.that an early start 谷idreninlangnageclaeerooms coverlonger periodsoftime,thereislittle evidence 講和人eS二お3EE生NNN1HIGUeYoOm mnton ( 2a ): better memories, more_efficient ways of organizing information、lon attention spans, better study habits, and greater abihity to jandle complex mental ecessary for their educaton most formal languaee tasks. ( 2b ):they see learning a foreign language 88 mi or career,( 2c ),twofactors that receive great attention in 10 classrooms. Adults usually want to learn a foreign language in a Ne children、who candevote manyyearstolanguageunastery。 Also,adults havecomplex communication needs (3)( abiity / wewwm / extend / mere / that/ the) to carry on simple conversations Adu】ts need to be able to argue, persuade、express COncern。 Object、explain、and present information about complex matters that *pertain to their life, interests、 work, hey often deny 15 or education. (④)Because most adults do not like to appear. themselves opportunities to practice for fear of making Wi or of not getting their message across. In addition, adults have more trouble than childyen in making new friends who speak the foreign 1anguage. to support the notion of children's superiority 20 One example usually given 1anguage learners is their ability to pick up an authentic accent. Itis usually observed pi t好at children of immigrants learn to speak the language of ther adopted country

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