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物理 高中

第七題的A和B(A對B錯

自然考科 Professional ACDE 6. 邊長為d之正三角板 ABC 各頂點分別有質點m=m&mp=2m, me=3m,此系統之質心距議議 √13d 之距離為何? √19d √id (A). (B) (C) Vid (D). (E) 6 6 6 5 4 【北模】。 【解說】 (0,0):A(d,0):C( 興 x=" 【解說】(A) mxd+3mx0.5d 5d 6m 12 L 3mod fod √x + √ √√3d √13d 6m 4 6 Th √√31 Ta X %= L 一均勻密度的矩形薄木板,厚度各處相同,長度為x,寬度為2L,重 量為 W,以兩繩A及B垂直懸掛在天花板上,如右圖所示。兩繩A及B 的長度分別為 L 及 2L,則當木板處於靜止狀態時,下列敘述何者正確? (A)當x=L時,則繩4的張力較繩 B 的張力大 (B)不論x 值為何,繩 4 的張力恆等於繩 B 的張力 (C)不論x 值為何,繩 4 的張力恆大於繩 B 的張力 (D) 當x≥ 23 L 時,繩B的張力為零 (E)不論x 值為何,繩A的張力與繩 B 的張力對木板重心之力矩,量值恆相等。 (B) B x=0 T -30°.. G A (C) 30% V. 2L >L Tºcos30T-00530) 六月 由 La、Lo得知 )=i TB>TA ..x=0=T₁=TB (A)由於力矩相等,故T>T; (B)只有當 X極小時 Tx=TB (D)當 X=25L 時,木塊質心恰好在 A 正下方,故TA = Wg,Tg=0且X>23L a x=2√3L Example 2. 如圖,A、B二物體的質量均為m, (1)滑輪受桌子之支撐力大平 (2)系統然掌沙力量值為 (3)系統寶心加速度大小為 【解說】 【北模】(A)(C)(DWE mg-T = ma 1T=ma T= mªda 2 B繩會軟掉,T 始終為0 類題→人生有兩齣悲劇 1. 有兩個體積相同 於光滑水平面上 量J,其俯視圖 動情形,下列 Emqu E 2 2m 8.光滑水平地面上靜置一長板,板上有一人相對於板面自靜止開始向右直行,如圖所示。若長板和 因地面光滑而可完全忽略,則下列相關敘述何者 (剛體受力運重 (A)兩球系統 (B)兩球系結 (C)兩球系 (D)兩球系 (E)兩球有 【解說】依據

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英文 高中

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三填(10題,每題2 分,共 20 分,答錯無倒扣) 21 for these, though. Why are we so different? Some people hate the feeling of being afraid and avoid situations like visiting ghost houses, watching scary movies, and telling ghost stories around the campfire. Others have a Researchers have found the answer lies in how the chemicals in our brain work. When we are afraid, our bodies can make fight-or-flight response, a reaction that helps us to decide whether to fight or escape. In these situations, our brains combination of hormones. Interestingly, the way our bodies respond to these_20determines whether we get to the movie theater to see a horror film or not. 22 a a have Psychologists say that people who 24 themselves in scary situations need to make sure that they are in a safe environment. For example, people who visit ghost houses have the _25 that they are going to be scared. They may 26 fear when Godzilla or Count Dracula starts chasing them. However, they know the _27aren't real, so they can enjoy the high feeling associated with the fight-or-flight response. Some people also feel a sense of confidence after they live through a 28 situation, even if they know it is false. How about you? When a scary 29__ turns up, will you escape or enjoy the fear? No matter which one you choose, there is no doubt that no one wants to face the $30. (A) horrible (C) release in real life. It's natural that everyone will escape from real danger. (D) tragedy (B) place (AC) expectation (AD) monsters (E) passion (BC) creature (AB) sudden (AE) chemicals

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