請問7,12

面,以等速度推 上推的作用力 不同斜面的斜 力? 同。 P (A) Fi 相同? (D)樓梯 輪上施力 (C)20 (D)10。 (A)(2)B物的密度為多少g/cm? (C)2.5 (D)5。 7. 如圖,釘書機上OA長8公分,AB長4公分,試回答下列 問題: 8 W F₁ A 針頭面積共 0.01平方公分 (1)當在B處往下施力2公斤重時,A處作用於紙張的力為 IZXZ=8X3 4B+ 【】公斤重。 (2)釘書針的針頭面積共 0.01 平方公分,若要穿透一疊紙張 (乙) 至少要壓力 600 公斤重/平方公分,則在B處應施力 】公斤重。 【 8. 如圖(甲)(乙)、(丙)、(丁)四滑輪重均略而不計,下方 均懸吊著重 W 的物體,試回答下列問題: (甲) (丙) (T) W W (1)施力F、F 何老乾:: 16 (A) F₂ 片 (B)2 F₂ ZW W W F₁ 2023.12.07 ** 57 MSH 21:09

看不懂這題😵誰可以教我 謝謝🤍

网 16. 如右圖,MN 為平面鏡,欲使入射光 AO 反射後的方向為 日 OB, 平面鏡應該如何旋轉? (A)逆時針旋轉 15度 (C)逆時針旋轉 25 度 焦點3 凸面鏡與凹面鏡 (B)順時針旋轉 15度 (D)順時針旋轉 25度 月 日 第4章光、影像與顏色 WITH AY 古老樞8 M B 30° O 60° 105 N

請問這題答案為什麼不是A😭，求解🙏

4 5 爸爸帶著兒子與女兒到公園玩翹翹板,三人所坐的位置如圖所示,爸爸、哥哥、妹妹的體重分別為 65kgw、 40kgw、25kgw。此時翹翹板倒向爸爸那一端且與地面接觸,三人都希望可以將爸爸那端抬高,不與地面接 C 觸,三個人皆提出調整位置的方式,請問那種方式可能會達成他們的希望? brother + sister 爸爸:我可以往前坐到甲的位置。 哥哥:妹妹往後坐可以和我坐在同一格內。 > father 40-3x 妹妹:我可以和哥哥交換位置。 (A)爸爸和哥哥的方式都可能達成希望 (B)三個人的方式均可能達成希望 (C)只有爸爸的方式可能達成希望 (D)只有妹妹的方式有可能達成希望 力臂同,同 力矩不变 IL IT kls 1841 to with 爸爸 65kgw 4XX65 = 260X 25-2X 妹妹 哥哥 25kgw 40kgw 3XX25 +4xx 75x+160x

求解

精熟 B (A) 144 (B)±144 (C)±588 (D) 588 a=49 -45 14 若多項式(x+2)(x+a)+(x+2)(x-7)與多項式(5x+1)(x-b)- 2(5x+1)有兩個相同的一次因式,且a、b皆為整數,則a+b=? DILE CA (A) 5 (B) 4 (C) 3 (D) 2 8. 有兩多項式 478121 49X(-12) (5x+1)(X-b->) T (x+y)(X + 9 + 4X-1) = (x+²) (5X-2+a) Extix+y b-12 A=x(2x-3)(5x+6),B=(5x+6) (4x'-9)。關於 A、B兩多 【基測 WITH TITO

想問一下這題怎麼算🙏🏻謝謝🙏🏻

F-14/ wy HYP ---- 工買了一點小时,上面出台的情-yes | | 南| 2(MiniL 4TH AV hinal 的 中间时间者也是台建 中洲中的含量 A 200ml H 25ml 酒 1 - 02 2009 " 250 好了。 09 近目前上现山寨版的「多多」「被船出海时间1 小时(shorum,食用過多的 *體型會政,去小體型的人體量1480ming/kg,着的能一350。 則人以下多少Z 101章重啟多,可无二? App (1) 日至少250油 11,11个 UTP 2 至少5{}{)相》華少 || MINI)應 | yull xx v 143 148urso { 電解4 ty FED光全溶於水,配成5WITHE 我所理密度的萬分 上壓為下列何者? 191) 答案是D MVXD 600 1.2 * 10 ppm (B) 10 X 10 ppm - SKY 1900 0 1.2 * 10 ppm D 10 10 ppm 十一 51 X5 ppm 52 ore x loppm = log10 ppm 12000

第6題怎麼算 求解 謝謝

F ma Do 天生 W=F&S = mxaxs =hx也移 - 質x 如何 4 pama wemas = 75 115度 >(E\u) 5 10 -t (s) 泗持”東 1 10-5 = = - 東 m' 5x5.25 : 22. lol老師講解 4.作功情 峻榮對一質量 4kg 的物體y sk 作功,其速度由 +5 m/s向 東變成-5 m/s 向西,如右 -& 圖所示。試問: a- a= (1) 0~5 秒間,物體的加速度為 | m/s 。 (2) 0~5 秒間,物體的位移為 (2 (2 12,5 125.: ( (3 (3) 0~5 秒間,峻榮對物體作功大小可用公式:smi (巴 W= FxS mxa XS。 W = FS. (4)承上題,0~5 秒間物體功為 - SO Job-mas 312,5X-7X (5)物體由0秒到10 秒間,作用力對物體作功 =. DMS AM = so -200 to $410 =W2 = 1x4*-12,5=50 ONIO = With = 50+ (6) 0~5 秒間,峻榮對物體作功的功率大小為 10 瓦特。 --50 =D: 03.014 (1) a= oss () 15), 10x1 = 50,92-5-5-10 S = 5*5=26: 10 To 25x5x5 : -624 W = 4x50x-1 22.00

求救 完全看不懂在幹嘛

223. 有一個透明玻璃是半圓球狀,位於球心 O 處放置 一紅色 LED 點光源。試問下列何者為此光線的折 射路徑 ?

21、22？

Ar人 加避是放置義、/遇2 are wider, and more cars are On the roads. “However 18,。, “My grandfather does not like what Mt “looks like today,”「 everywhere 到虎 wide 竟的 區 0 )17. (Atime flies (B) there are cleaner rivers (GO itlives In trees (D) everything is different 8 和慚 18. WUa lot ofpeople enjoy buying CaTs5 | (8 iis brings heavy traffic and terrible ar et0tofpeople follow traffic Tules (0 its more and more difficult to buy a house here ( 19一22) 、 人 1 Bob: My sister gave me awhite elephant ]ast Saturday, 4 1 butIdon't know what to do with 1t. 和 Ted: A white elephant? “Give it4othe Zoo.” How 1 # could you have such a ]arge space to keep 162 # - Bob: Ijust keep it in front ofmy house. Is clean and $ beautiful.” But it needs too much petrol. 9 。 Ted: Petrol? “Are you talking about a car? 。 # Bob: Sure.”Did you think ofareal elephant? / 時 Ted: Yes, Ithought your sister gave yOu Iving $ 全 animal. # Bob: Icall the car““a White elephant”becauseI seldom : 4 4 ! ! drive.”Howeverp Thave to not only spend a 10t $ 【 崗 2 What did Bob:s sister give him?2 AAreal elephant. (BAwhite car (GOAear ~(p)A bottle ofpetrol. How did Bob feel when his sister gave him a (B) He felt worried. felt excited. (D) He feltproud. fhe word maintainlng mean?7 care 0f. 另 Watehing out for 和0 佃Beingfond 9t, [ 背面肖有試題

28求解！！！！

esting story abs Have you ever thought about why the sea is salty? Here's an why there isalot of salt in the sea. ial power ery special hand mill which had There was once aking who owned nd turn the Iteould_ 先 All one had to do was say the name of the thir mill. And 紀 Athi nm what one asked for would come out ofthe mill right away eal it. He ca io heard about this hand mill made up his mind to ste hand mill However, he Ifhe didr agood plan which worked, and excitedly, he gott ewould beq decided to steal a boat and left the country by s caught on the road a. He started to think aboutw The thief stole a boat, and he was how safe on t “Hahal Task for salt he should ask from the hand mill. Then a great idea hit hims and become the Everybody needs salt. After the mill makes alot ofsalt for me,Tllse ,”he shouted excitedty and turmew | richest man in the world!”he said to himselt fthe mill Seeing salt coming out ofthe mill, he was so happy that he started singng ane there was Salt all over the boat. Before the thiefknew it the boat W the thief anq the mitl dan' Soony as So | heavy with salt that it sank to the bottom ofthe med and made salt, Wwhicl And so his why the sea is salty | Since then, the mill has tumed and (A) make you the richest person in the world ou anything you want C) show you about your future (D) take you to any place you'd like to go 人@ 人Ge@ (GO 「 36 (A feltreally bad for the king 慚 B) didn't wantto share it With his family 0) was thinking about how to usSe 了 W ell (D) was afraid ofbeing found out DB Give me salt (A) Take me away (0) Please dont stop (D) Go faster (0@ had (D woulw

為甚麼?

tg (申) Yv04 「故還還 “種神奇 夫 錄指針 」它會永遠指 With條, 使海上的冒險者 不致迷失方向,且不同的的「紀錄指 外,可以紀錄不同的目標。試以所學 的科舉知識判斷,此種羅盤是否可各 真在? (A)可能, 日前市面所用指北鐘/ 也總 是指向地磁北極_(8)可能,只要當季 的磁場夠強,就如同鐵吸引磁針(CC) 下可能、磁針指向會隨著所在地點而 變,不會永遠指向同一-目標_(D)不可 能、因空間中的同一地點,磁場和有 一-個方向 ( 旋 )4附圖為磁場中的一條磁力線*請問磁 針N感在P點的指向為何 2