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.

救命啊

A point charge Q is placed at one corner of a Gaussian surface in the form of a cube of side L. What is the total "electric flux" through this Gaussian surface in terms of Q/ & o? (A) 0; (B) 1/8; (C) 3/4; (D) 5/6; (E) None. Which is not correct for the dielectric constant (x) of a substance? (A) It is a measure

哈囉，拜託誰能救一下

One mole of an ideal monatomic gas is taken around the reversible cycle shown in Figure.1 (on the right). What is the efficiency of this "heat engine"? (A) 4/21; (B) 5/14; (C) 6/11; (D) 7/34; (E) None. 3Po Por 4 a Q4 d Vo est C Q2 2%

要死了🥲

Which statement is not correct for the "shear modulus"? (A) It has the same dimension as the "pressure"; (Bt involves the application of two parallel forces of opposite directions along the same line; (C) It can not be defined for an ideal fluid; (D) All; (E) None.

在講什麼😀

A rope of mass M and length L hangs vertically. What is the time I needed for a pulse to travel from the bottom end to the support? (A) 0.5 (L/g)0.5; (B) (L/g) 0.5; (C) 2 (L/g) 0.5; (D) 2 (L/g); (E) None. Which statement in want for the 66t 220

這題為何是B

Which pair of vectors is not always in parallel? (A) Velocity & linear momentum; (B) Angular velocity & angular momentum; (C) Net force & acceleration; (D) All; (E) None.

這些選項在講啥😅 答案B

2. Which is not correct to apply Newton's 3rd law? (A) All measurements should be made in an inertial reference frame; (B) The interacting particles can not be accelerating; (C) No virtual force (e.g., the Coriolis force) is involved; (D) All; (E) None.

想問8,9題，謝謝

8. 光功率正比於光子能量及每秒釋放的光子數目。如右 圖,在交通路口紅綠燈上的紅､黃､綠三種色光,若 A 發射功率皆相同,則在每秒中,哪一色光會放射出較 多顆光子? O (A)紅光 (B)黃光 (C)綠光 (D)不一定 (E)無法判斷。 9 太陽或白熾燈泡發出的白光經過光譜儀可得到連續光 譜,如同牛頓曾用三稜鏡將光分離的色散現象。今用一 束複色光線經玻璃板折射後分離成三束光線(紅､綠､ 紫),分別照射到三塊相同的金屬板a､b､c上,如右 圖所示。已知金屬板b有光電子放出,則下列敘述何者 正確? abc (A)三板皆可放出光電子 (B)板c一定不放出光電子 (C)板a一定不放出光電 ______ 子 (D)板c一定放出光電子 (E)板a一定放出光電子。 CHI MALER 「右2(應選兩佰 二、多重選擇題

想問一下 1屏蔽作用會要求球殼接地的前提嗎？還是說不管球有沒有接地都會屏蔽 2如果接地了不是代表電荷會被引到地面，那詳解正電荷周圍的負電荷以及球殼外的正電荷又是怎麼來的。

8 23 如圖18所示,在一電中性空心厚球殼球心處放置電量為Q (Q)的點電荷,已知厚球殼的內半徑為r、外半徑為 r,則下列敘述哪些正確?(庫侖常數為k) (A)厚球殼的總帶電量為零 (B)厚球殼的總帶電量為-Q (C)點電荷所受靜電力量值為零 十 kQ² kQ² (D)點電荷所受靜電力量值為 DEVE 2 2 r₂₁f r2 圖 18 (E)若將球殼的外表面接地,接著在球殼以外距球心為｢(QS)最重 (r>r,)處放置另一個電荷Q'Q'<),則球心處的電 CRE AS 3.12: 荷Q所受靜電力量值為零。 ATL + 12 2. (3)

為何壓縮功是負的，我知道題目的敘述功是負的，但對氣體壓縮的功正常來說不是都是正的嗎？

***An ideal gas does 80 J of work when compressed isobarically. The heat given to the gas during this process is: (Cym= 2.5R) (Hint: w=-PAV for isobaric process ) (A) 700 J (B) 350 J. (C) 280 J (D). 300 J. (E) 2001- 答案:C w= 80J= -PAV (for isobaric process). PV=nRT. PAV-ORAT AU-n*2.5R* AT-2.5"(PAV)-2.5*80=200J. AU-q+w-200--80+q- 9-780J.