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

啥🥲

What is the moment of inertia I for a uniform ring of radius R and mass M about an axis (perpendicular to the plane of ring) at its rim? (A) 0.5 MR2; (B) MR²; (C) 1.5 MR²; (D) 2 MR²; (E) None.

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.

怎麼寫

If the energy needed to send an object (initially at rest on the earth's surface) to a maximum height H is a half of that for sending it into an orbit at the same height, what would be the value of H in terms of RE (the radius of the earth)? Ignore the earth's rotation. (A) 1/4; (B) 1/3; (C) 1/2; (D) 2/3; (E) None.

這題在講什麼。

A ball of mass m moves in a vertical circle at the end of a string. By how much is the tension at the bottom greater than that at the top? (A)0; (B) 2 mg; (C) 4 mg; (D) 6mg; (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.

剛開始在練題目，很多題不了解，大家幫幫忙～感恩

(2) 十九世紀末,普朗克對「熱輻射實驗」結果提出驚人的創見--能量量子化理論,認為 任何一束光都有一基本能量單元,稱為能量量子,其值為E=吋,該束光的總能量為然的 整數倍,即E= 列何者? kg² m (A) sec³ kg² m (B) sec SI 中的基本單位來表示,應為下 式子中「」稱為普朗克常數,若以 kgm² (C) sec kgm (D) sec² kg² m² (E) sec 2