想問32題

ar C People of all ages all around the world have been touched by Walt Disney's works and inspired by his rags-to-riches story. His own road to success A29 the positive message the company has been sharing with its fans repeatedly: Never give up on a perfect example of your dreams. 30 drawing as a boy and founded he was faced with Born in 1901, Walt Disney developed a passion the Disney Brothers Cartoon Studio when he was twenty-two. 31. many difficulties and failures along the way, Disney didn't lose faith. One day, a sudden inspiration struck him. He created a joyful little character, Mickey Mouse, that saved his shaky career and helped him build his entire fantasy kingdom. In the years that followed, Disney Studios completed popular animated film after 32 countless iconic characters. 動畫電影 32 If Walt Disney were alive today, he would warmly reassure you and introduced that your achievements depend on your 33 and willingness to keep trying. He would also tell you that sometimes the key lies within your most unexpected daydreams. If you can dream it, you can do it.

（第一張照片）守恆的概念是沒問題的，但換符號好像有點問題，mg是怎麼換成mV/r的？？？還有a是怎麼換成V^2/r的？？？感覺是我前面換算學得不太好的關係🥺 （第二張照片）想知道c選項的算式是怎麼來的？

範例3 圓周運動的力學能守恆 雲飛車是一種常見於主題樂園中的遊樂設施, ao 其軌道通常有如圖所示的迴圈。若考慮正圓的迴 圈軌道,且軌道可視為在一鉛直面上,雲霄飛車 的車廂在沒有動力驅動之下,沿著軌道內側繞行, 且軌道只能提供向心力,摩擦阻力可忽略,重力 加速度為g,則當車廂可沿整個圓圈軌道繞行時,車廂在軌道最低點的加速度量值至少 為何? (A) 2g (B) 3g (C) 4g (D) 5g (E) 6g 向心力: V₁ F=mg= m JJR VH R + a₁ = JEJR (JSJR) R V₁ R 1=5g A.0) 願選一條長為R的繩子綁住一個石塊,讓石塊一開始在鉛直面上作圓周運 動,石塊的位置可由石塊—圓心連線和水平線夾角表示,如右圖所 Mo 示。若石塊在最低處的速率改為 7gR g為重力加速度,則石塊轉 2 到何處時會脫離如圖所示之圓形虛線軌跡?(已知sin37°=0.6) (A)=30° (B)=37° (C)=45°(D)=53°E=60° R my mg cose 79R 2 ① 力学能守恆 /m() :/mv+mgal1+sine) myR 2 → v² 1 gk (3-4 sino) ② 圓周運動(向心力:張力、動) T+ mg sino - V = 1mg (3-4 sino) →繩鬆⇒7:0 →脫離:與最低點高度差h " R+R Sind ⇒ 0+mg sine = 1 mg (3-45/40> : R(1+ Sine) => sino 0-300 【107. 指考】

答案是時速81公里 但我算出來是時速162公里 麻煩幫我看看我算錯在哪 謝謝！

V哔 2.一汽車能以54km/hr速率在斜角之斜坡上等速往上行駛sin =0.02,若此 時,車所受阻力為車重的0.04,則該車以相同功率等速駛下斜坡時,其最大 速 率為 km/hr。(設汽車所受阻力與其速率成正比)

請教一下這兩題的解法🙏🏻🙏🏻🙏🏻感謝學霸們🥹🥹！！！！

6 4.已知有一組數據(x,y),i=1,2, 8,6mth 20,少對x之最適直線斜率為 另一組數據(x,y)滿 4 1 足x=2x-4,y=-1+33 求yi,對x之最適直線斜率為 10 5.設兩變量x與y的數據如下表。 2 10 # MX = 42 ㄚˇ x 13 4 5 ST 6 a 二

請問這兩題怎麼算

10. 利用數學歸納法證明: 對於所有的正整數n,12+3°+5°+..+(2n-1)'= 李n(2n-1)(2n+1)。(9分) [配合例題7]

求解這題的E選項怎麼判斷

100 225-1000 291 17. 設有兩組數據X:X1,X2,...,xn; Y: yi,y2,...,yn滿足 yi = J=100X X=100y=10000y. 10002 4 5. Eyi² = 445000 ;. 14454 45 +55, yixi' i = 1, 2, 知x1,x2,…, 皆為正整數。若Y的平均數是60,中位數是58,標準差是4,則下列選項哪些 是正確的?(多選) (xX的平均數是20 My = 60 My=60 Yi =7xi+55 60 4=4+16 黃素 (B)X的中位數是4 (C)X的標準差是1 53 303091 (V)Y的全距與X的全距相同(E)X的所有數據不大於 73。 58×411+55 E.2A

請問這題怎麼算 （4，-40）

" 9 16. 10 (xi,yi) i = 1,2,3,,10¥¥¥* µx = 5, xi' =2xi yi'=3y;" i=1,2,3,,10yi' x'y' = 9x' - 60 xi" 3xi + 5 - My lo " yi" i = 1,2,3,···,10 yi" #x;" y = ax + b (a,b) = " 14755 Збу y = 9x' -60. 9=r- 20x Mx=5 Mx = 10 =4 Mx=20 My =10° My = 3 My = 30 5x By 5x = 25x By = 3 By = 20 My" = a=r 254 збу 5y" = 35x α=4 By" = 25y 20=80+b 17. 觀察圖中數字規律,若an 表示n×n 方格內數字的總和,若一般項 1 a - (an³ +bn² + cn) ,則序對aho (1.3 +1). -

求解

A-D-E (E)同(B),角速度變成一半 OC v xm 20 w = T 24. 不計空氣阻力,質點由地面與水平成0角拋出,下列敘述哪些正確? 22 (A)起拋點的曲率半徑為 gcose (D)最高點的曲率半徑最小 (E)最高點的運動速率最小 Mg = mx (B)軌跡最高點的曲率半徑為 v² cose g r (C)落地點的曲率半徑為一 B.my= my=mx.vt 兩個待地球做圓周運動的人造衛星A與B,其軌道速率比為2:1,質量比為2:1,則A與B之 22 gsino bo V: GM R 2:1

問a為什麼薄板一定帶來阻力？

B YARIM 80) 20 右圖所示為一帶電粒子偵測器裝置的側視圖:在一水平放 置､厚度為d之薄板上下,有量值相同但方向相反之均勻 磁場B;上方之磁場方向為射入紙面,而下方之磁場方向 為射出紙面。有一帶電量為q、質量為 m 之粒子進入此偵 測器,其運動軌跡為如圖中所示的曲線,粒子的軌跡垂直 於磁場方向且垂直穿過薄板。如果薄板下方軌跡之半徑R 大於薄板上方軌跡之半徑r時,設重力與空氣阻力可忽略不計,則下列哪些 敘述是正確的?(多選)做出12520 不 (A)粒子沿著軌跡由O點運動至P點 (B)粒子帶正電 (C)穿過薄板時,粒子動 ING q²B² 能增加 (D)穿過薄板所導致的粒子動能改變量的量值為 2m (R²-r²) > (E)粒子穿過薄板時,所受到的平均阻力量值為 qB md (R² - r²) 合對率51% WO x qBrx xV₁ = m x V/₂= • m ma BR 【修改自6指考】

英文問題 may not be什麼意思 感覺題目詳解給錯了

第 48 至 51 題為題組 Many of us have probably experienced déjà vu at least a few times in our life. Its meaning comes from the phrase "already seen" in French, and occurs when we feel that a person, place, or thing is familiar to us without actually having experienced them before. This strange phenomenon happens to as much as 70 percent of the population, but a higher number of 15 to 25 year olds experience it than any other age group. Maybe you just travelled to a new foreign country, and it just felt very familiar to you. Yes, you are feeling déjà vu; however, you know you haven't been there before. While different people experience déjà vu in different ways, it is still a pretty mysterious phenomenon, and researchers are putting the pieces together. Based on some studies, déjà vu is just a part of having a healthy memory checking system, and people who experience déjà vu more often are less likely to forget the details of important events. In fact, the results of the study don't look too promising in terms of mental health for people who never experience déjà vu. Scientists believe déjà vu is created by a neurological anomaly related to an improper electrical discharge in the brain. In short, it's not a mystical prophecy or out-of-body experience, but just your brain playing a trick on you; that is, these scientists dismiss it as just a glitch in the matrix. A few people are just terrified when it happens, but others feel euphoric about it. On average, most people just find it to be a perplexing sensation, neither pleasant nor threatening. Since déjà vu occurs in individuals with and without a medical condition, there is much speculation as to how and why it happens. Several psychoanalysts attribute deja vu to simple fantasy or wish fulfillment, while some psychiatrists ascribe it to a mismatching in the brain that causes it to mistake the present for the past. Many parapsychologists believe it is related to a past-life experience. Obviously, there is more investigation and researches to be done. So, does this article seem very familiar to you? 48. Which of the following CAN'T be described as a déjà vu experience based on this passage? (A) You keep buying similar style of clothing and you don't know why. (B) You feel you've been to a place when actually it's your first time there. (C) Someone looks familiar to you though you have never seen him before. (D) You just met a new friend whom you think you must have met somewhere. 49. Based on the article, which description about déjà vu is WRONG? (A) It actually is not as harmful to our mental health as we think. (B) Some people who have experienced it may feel a sense of happiness. (C) The word"déjà vu" originates from France, meaning"already seen." (D) Those who never experience it may not be mentally healthier than those who do.