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理科 中学生

これの問四と問五が分かりません。 解説付きで教えて下さい。 ちなみに答えは 問四  4.61 問五  イ です。 よろしくお願いします。

実験2) 図2のように, 船が岸壁に向かって 14m/sの速さで進みながら,愛さんからの距離が 1000mになっ 図1のように,岸壁から 80mの位置に愛さんが立っていて, 海上の, 愛さんから1038mはなれたと -ろに,登さんが乗った船が停止している。登さんが船の汽笛を鳴らしたところ,3秒後に,汽笛の音 実験1] が愛さんに届いた。 たところで,登さんが船の汽笛を5秒間鳴らした。すると,汽笛を鳴らし始めてから数秒後に,岸壁に 反射した汽笛の音が登さんに届いた。 したポー 図1 図2 三岸壁 そご岸壁 35 登さん tの O A 愛さん 愛さん ○登さん 996 1 Pooo booo 6540dhm 3oos ; 80m: 55 1038m 80m 開1 実験1の結果から,このときの音の速さは何m/sか。 340y。 S 間2 気温が0℃のとき, 空気中を伝わる音の速さは 331m/sである。気温が1℃上がるごとに, 速さが 0. 6m/s ずつ速くなるとすると,実験1,実験2を行ったときの気温は何℃だったと考えられるか。 2 問3 実験2で,岸壁に反射した汽笛の音が登さんに届いたのは, 汽笛を鳴らし始めてから何秒後だったか。 問4 実験2で,登さんは,岸壁に反射した汽笛の音を何秒間開いたか。小数第3位を四捨五入して,小数第2位ま で求めよ。 間5 実験1で愛さんが聞いた音と, 実験2で登さんが聞いた音は, どのようになっていたと考えられるか。次の ア~エから1つ選び,記号で答えよ。ただし, 汽笛は, 鳴らした時間以外はすべて同じ条件で鳴らしたものとす ア,愛さんが開いた音の方が1秒間の振動数が多かったので, 愛さんが聞いた音の方が高かった。o イ、登さんが聞いた音の方が1秒間の振動数が多かったので, 登さんが聞いた音の方が高かった。 る。 ウ.愛さんが聞いた音の方が1秒間の振動数が多かったので, 愛さんが開いた音の方が大きかった。 エ、登さんが聞いた音の方が1秒間の振動数が多かったので, 登さんが聞いた音の方が大きかった。 T) ちを火い 問3 問4 大口 問2 問1 秒後 25 ℃ 346 m/s (合COtOCS (旧-)こ合 tos () 問5 今HC

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英語 高校生

解ける方答えを教えて頂きたいです

When I waa just a little girl, I realized that my grandmother was a witch. ( 1)that time, was reading atories about Snow White and Sleeping Beauty and (ア) (nbout/1/that'a/witchen /learned/ where) My grandma was good to talk to. In many waya ahe waa your typical grandmother ahe atudied tai chi, and made pottery and quilta. But if ahe wants to fool me(2 ) believing ahe ia not a witch, ahe ahould get rid of her black cat. Only she can touch Satan,and that devil eat's green eyes are really Bcary. Anyway, over the yeara I got into the habit of going( 3 )to mee Grandma after school and telling her all my troubles, I never let her know that I knew her secret and ahe didn't sny anything(4)。 But when I was in my second year in high achool, I ran into a problem. It required a little magie to set right, so I thought I'd aak her straight out. “Grandma, are you a witch? 1 said. "Of course," she said. "I thought you knew." "Do you know how to cast apella and make potiona?" "wDepends," ahe said. "What's on your mind? Is ita love potion you need? "Tell me all about it, Amy" “Well," I said, "you know it's my Year 10 Formal in November, and nobody haa aaked me yet. Id really like to go with Stevo. You know him. He's always lived next door to us. But he goes out with all the popular girla at school and thinka ( 5 ) me as just hia siater." My grandma thought a minute then went into her bedroom. She came back and put a little bottle of red liquid in my hand. “This will fix him," she said. “How can I get him to take it?" “Oh, you're the one ( あ ) has to take it. Three sips are all you'll need. When will you see him next?" “He's coming to my house tomorrow after school." “When he comes, ask him in and take a sip of the magic potion. Then take your shoes8 off and go outside, and jump up and down the path for a minute or so on that pogo stick I gave you." “He'll think I'm crazy. I can't do that." “Do you want him to take you to the Formal or not?After that, come inside and take another aip. Then let that lovely hair of yours out of that ponytail, brush it for two minutes, and put a flower in your hair. After that sit on the floor and take the third sip." “Will that work? Hell think I'm crazy." “Just think positive," said my grandma, "And by the way, don't wear that old pair of jeana and that baggy shirt" Next day I was waiting for Stevo after school. I had on my new akirt and my new blouse. Iopened the door, still not sure if I'd be able to go through ( 6 )the plan. “Where are you off to?" he asked. "Anyway I can't atay long." “It'e OK,"I said looking at my watch. "Tve got plenty of time." And before I knew it I'd taken the first sip. It (4) (the medicine/abit/1/ike /used/tasted) to take when I wasa little ldd. “You sick or something?" he said. 1 just gave him my new Mona Lisa smile and kicked off my ahoes. "Juat a sec," I said. I picked n the pogo stick from the corner, went out the front door, and jumped up and down the path for a while. I saw Stevo looking out the window at me with ama puzzled expression. Iwent back inside and he said, "You all right?"

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