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.

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1/1 100% ·一子彈速度為800 m/s,恰可穿透 40 cm 厚且固定不動 的木板,若木板對子彈的阻力(F)為定值且不計子彈的 體積(當作1個質點),試問: (1) 若恰可穿透 80 cm 厚的木板,子彈最小速度應為多少? (2) 若子彈以上一小題的速度射向 20 cm 厚的固定木板,則射 穿後子彈的速率應為多少? 提示: 1. 恰可穿透 → 剛好穿透而速度變成0 2. 阻力是板子給子彈的反向力量 3. 利用動量的變化來計算

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.

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9 = 30°。若不考慮斜面及滑輪摩擦 - 12. 如圖3-19 所示,mt = m2 力,則物體之加速度為若干? m2 mi 9

請問這題的這句是指金屬靶沒有功函數嗎 謝謝

* * BY 新 8. 一個電子經過電位差V加速之後,撞擊金屬靶而將動能完全轉換為電磁波的光子能 C量。若此過程能夠輻射光子的最短波長為,普朗克常數為h,光速為c,基本電荷 為é,則下列有關此最短波長光子及入射電子的敘述,哪些正確? * = (Alls B光子的動量量值為" 子的能量為ey (D)光子的頻率為 (B)電子的動能為jer。 hc - C V ev-ho 9 hc as A3 (103 指考,得分率46%) P-t-ev

怎麼寫⋯

2.2 A batch of 100g of Na2SO4 is dissolved in 200g of H20 and the solution is cooled until 100g of Na2SO4:10H2O is crystallized out. Please do a DOF analysis and calculate the composition of the remaining solution. (Na2SO4:10 H2O = 322.2, Na2SO4=142.05) Answer: DOF = 0; Na2SO4 28%, H20 72%

第三小題錯在哪裡

3.)* True/false: Find the incorrect conclusions from the following sentences and correct them. (12 points) b H2 •T2 H An ideal gas changes its states isothermally through a chemical reaction. AH is zero because AH is equal to Cp x AT. H TI ® The pressure change does not contribute to the energy state (U or H) of ideal gases. P * Figure 1 is correct for illustrating the enthalpy state of real gases. Fig. 1 AT1 ATL+1a na:daalraa ahonnan kantot fo. U +- IT 1.1 D1

求解

而是 範例2 相關類題: P.56 進階挑戰單選題 3. ALL二 物體重量就是物體所受地球的萬有引力,而計算萬有引力的半徑,要從地球中心計算起。假 1 HOTELL PERE 設地球半徑為R,今有一顆人造衛星在距地表高R處,其重量為在地表之幾倍? O

有人會解這個嗎？想知道答案

5. (Ch. 14 - Problem 81 in Wolfson) Two loudspeakers are mounted 2.85 m apart, pointing in the same direction and producing identical sound waves of a fixed fre- quency. You're standing 10.0 m from the speakers, on the perpendicular bisector of the line between them. You move in direction parallel to the line between the speak- ers and find that the sound intensity diminishes, reaching a minimum when you've moved 2.44 m. If the sound speed is 343 m/s, what is the frequency of the sound waves?

怎麼寫？ 🙏P單位跑到指數去我就不會了

Dimensional Consistency 1.9 The density of a certain liquid is given an equation of the following form p = ( AT + BT2) eCP Where pis density in g/cm3; T temperature in K; P pressure in atm; and A, B, and C are constant. The equation is assumed dimensionally consistent. What is the unit of B?