求解圖裡UICK quiz的第二小題

acit0r 1taneOuls CUrTent Differentiating Equation 27.22 with respectto time gives the inst: as afunction of time: 4 tt號 一Fe ptasafurc 主二 where Q;/有CC 三方 is the initial current. Figure 27.15b 5 in the resistor that we guessedin order to-apply Kirch Equations 27.15 and 27.21. Equation 27.23 shows that the ci ing capacitor is negative, indicating that the current 1s Figure 27.15c. Both the charge on the capacitor and the ct tially at a rate characterized by the time'constant7了三用C. 人 i 一 GOuicK ouiz 27.5 Considerthe circuitin Figure 27.17 and assume the battery has after the switch is closed, what is the currentin the Figure 27.17 no internal resistance. () 」 battery (a) 0 (b) &/2A(G 28/Z04 8/元(e) impossible to determine (ii) After a 有 eyerylong time, what is the Currentin the battery? Choose from the same choices. theswitch is CC (3 前:銜1加信介2放 IntermittentWindshield Wipers nobiles are equipped with windshield wipers that can operate intermittently during alight rainfall. How does ofsuch wipers depend on the charging and discharging ofacapacitor7 民 The wipers are part ofan 及C circuit whose time constant can be varied by selecting different values of及through amultipo- Sition sWitch. As the voltage across the capacitor increases, the capacitor reaches a point at which it discharges and Higgers the wipers. The circuit then begins another charging cycle. The time interval between the individual sweeps of the wiperS 1 determinedjby the value ofthe time constant.

6-20求解

忿6-20. A 4.476-g sample of apetroleum product was burned inatube furnace, and the SO2 produced was col- lected in 3% H,O>. Reaction: SO2(9) 十 H202 一 H2S0O4 A 25.00-mL portion of 0.00923 M NaOH was intro- duced into the solution of H2SO4, following which the excess base was back-titrated with 13.33 mL of 0.01007 M HClL Calculate the parts per million of sulfur in the sample.

請問這題怎麼算？

Calculate the change in internal energy when 2 moles of CO are converted to 2 moles of CO2 at latm and 255C: 2CO(g) + O2(g) 一 2CO2(g) A刀=-566.0 kj/mol

順手解物理，救救gpa 拜託各位大大幫忙了！

計點廬生計衣 2 廚語 生汪和 When 1t 1s built on the Moon?》 (Hint: Use the formula: elastic energy denslty 三 o7/2Y) 2. (a) Find the acceleration of ml of the pulley system, assuming mi > m2 and the Imasses of the rope and the two pulleys are negliglible. (Hint: It ls easier to do this by usSlng the conservatlon of energy.“Put down an equation for energy conservatlon: AK(CV)十AU(X) = 0, where x 1s 了e distance mi drops and vis the veloclty of mi (and m2). “Then, differentliate the edquation with respect to time t.) (b) What is the tenslon in the rope and what are the external forces Fi and F2 exerted by the ceiling to hang the pulley system? 2 人上上

請問一下，第45題怎麼算

96d nt” Chemieal EdUUDT LT 人 說 1 ction below ata certam 1 全 同 同 equilibrium ee 說 ii [Ho2] 三 0.0500 TE 、 ipid container are 總 人 2 抽 Ho(g) + 到(tg) 三一 2HF(g) /@巡 > 1 / 1 語全 全胸 : iibri mmIXtUure, 0 2 於 了 人 0.200 mole of Fz is added to this 1 gquilib- thee 2 caJcuJate the'corcentrations 9f a11 gases 1 )。 入 rium is reesfablished- 2 只汪 人 和 沿之 / (9 1100 K, 及p 0.25 for the following reactlon 1 三入 3 、 一一 所 全生 /4 2SQ23(g) 十 Qz(g) 二二 250O3(9 du Ttbe 選娘 an ial pressures of 502, 人2 te 全 了Cajculate the eduilibrium Partial pressure 人 同 葬 也62人 5O3 produced 自om an initfaL_mixrure In 8 oo 三 Po 王 0.50 atm and Pso, 三 0. 2人 三人 1和 宅及林用 生 ” 46. At 22002C 肥 三 0.050 for the reaction 2509 4 2 yy2(9) +O2(g) =二 2NO() 的 What js 和the partial pressure of NO at equilibrtum as 人選 9 suming he N2 and O2 had initial pressures of 0.80 atm 全 // -彈d 0.20 atm, respectively? @ / 32 5 相/ 和pe )f reactiOn_ we wi study is that having a very 汪 補- 六sma上有value (K<< 1 Solving for equilibrium concen- 一條0說人 frations jm an eduilibrium problem usually requires many mathematica| operations to be performed. How- 說 和 even the math involved in solving edquilibrium problems 。。 %6 2 Ina D6909 , for feactions having smal| K values (K << 1) 1s simpli- 527- fied. Whatassumption js made when solving equilibrium 1 Concentrations for reactions having small 太 values? 534 Le 台 戰 Whenever assumptions are made, they must be checked ler ? (吃 hdiry np general the 59 rule> is used to check t cd 旨 Me Vaudlty of assuming thatx (or 2x, 3x, and so on) is ga 只 sma compared to some number Whenx (or 2x, and so 1 less than 和

求救啊QQ

一一~ / 三、MWOS7E了了 工efs wo表 ouf Moore:s Jaw, which states the 人 7PD-fype Subsfrafe (58ody)Cpanmnel 吧 和 Tegion , Drain reglon f “Fi9. 3-1 (LeftA planar MOSFET; (Right) a FinFET