請問第1題怎麼解謝謝🙏🔥🔥

1- (B) t Flis Bost \IS ^. t 2v 3v (0) ²Y ³Y 4V 3 V-VE D 老 超越頂標‧進階題 某質點從A點開始作初速度為零的等加速直線運動,到達C點時所用的時間為t,B點 為 AC 間的某一點,已知質點在AB 段的平均速度為v,在BC段的平均速度為3v,則 本 質點的加速度量值為何? A→B一半的Ve 4v gx w = 3t B-76...V=Ve 平 2 一靜止物體由A點出發作直線運動,10s後又回到A點,其 a-t 圖如右圖所示,則物體距離A點之最大距離為多少m? (A) 35 (B) 50 (C) 65 D) 75 (E) 100. 第5ky V0. 起落 2-4 等加速運動 45 a (m/s) 10 0 -2/416-3 6-t(s) 6:8 -15

想問A選項😅

* AU 960 ⑤.一質點沿x軸作週期性的運動,其位置坐標x 對時間t的關係如圖所示。下列有關此質點運 動的敘性? 哪些正確?(應選2項) ()質點在任一週期的平均速度均為零 (B)外 F=MXA 15 PIS 時 F és x (m) 21 =L -2-1 0 1 2 3 4 5t(s) √₂1

求解

類題 3.1 右圖為一光纖之側面剖面圖,其中n 及 n, 分別代表不同物質之折射 率,n 之部分稱為核心。若要使光在核心中靠全反射傳遞,則sin0 的 最大值為 loa+3=90° sina = Cosp 1 x sing = h, x sina :hi xausB 閤:√n^-n 2 0 中心軸 n=1 nistro₂ =n₂sin D₂ R. n₂ n₁ M₂

不好意思想請問這題的C選項要怎麼算

Z E = r M «M) 50. 已知一星球可被視為一半徑為R、質量為 M 之均勻球體,而質量 之衛星在距此星球中心:(r>R)處時,要完全脫離此星球之引力到達無限 遠所需的速率至少為v。若此衛星以半徑r之圓形軌道繞行星球,則下列敘 GMm-mx DC述何者正確?(設位能在無限遠為零)(多選) from 脫離能 v 隨r之增加而增加。 GMANe (E=-9 衛星的總力學能為正值 2n VE GMmmv² 衛星的總力學能 E= Gin r m D)衛星的總力學能隨r 之增加而增加 26M 下(E)衛星的總力學能隨星球質量 M 之增加而增加。 GMm +Ek GMC r anne r K_(SINGE.

B是答案，但波爾氫原子理論不是有能量嗎？

Which issue in the spectrum of hydrogen atoms can not be solved by the Bohr model? (A) The existence of separated series of lines; (B) The relative intensity of each line; (C) The wavelength of each line; (D) All; (E) None.

C

Which statement is not correct according to the "theory of special relativity"? (A) Whether two events at different locations are simultaneous depends on the frame; (B) The relative velocity of two objects never precede the speed of light; (C) The "effect" may appear to occur earlier than its "cause" as observed in some frames; (D) All; (E) None.

A答案，求救

A laser beam of intensity S and cross-sectional area A is completely absorbed by a particle of mass m for a period At. What is the change in speed of the particle? (A) SAAt/mc; (B) SAAt/m; (C) SA/mc; (D) SAAt/c; (E) None.

救我感恩您

Which is not an appropriate pair of analogy between mechanical and electrical quantities of the oscillating systems? (A) x➜ Q; (B) v ←➜1; (C) m← C; (D) F→ V; (E) None.

😀

(B) the current; (C) the sign and concentration of charge carriers; (D) All; (E) None. A particle of mass m and charge q is in a circular orbit (of radius R) normal to an external field B. What is proportional to the magnetic field created at the center of its orbit by the charge? (A) m; (B) q; (C) R; (D) B; (E) None.

🧍‍♀️

for an ideal conductor; (D) All; (E) None. A conductor has a surface charge density o C/m². The force per unit area on the surface is (A) 0; (B) σ²/2 80 N/m²; (C) o²/ɛo N/m²; (D) 20² /ɛo N/m²; (E) None.