想請問這題的醚和胺的沸點可以如何排序？ 因為我印象中氫鍵的影響比極性大，因此不了解為什麼胺的沸點比醚小 謝謝🙏

56. List the following compounds from highest boiling to lowest boiling: NH₂ 分子量 - * b₁p= HB dipole 為何 ↓ relatively weak HB OH ⑥ dipole-dipole interactions Q= LOH has two groups that hydrop bund ~HNY WH HB的影響力不是通常大於極性嗎? OH Obme electronegative thun N, OH Ingen bond are stomper than NH₂ primary amines form stronger hydrogen bond than seculary relatively weak no bydrogen had hydrogen bonds HB→分子量(分散戶 nly dipic dipole →接觸面積→極性 hah no hydrogen bon weaker dipole-dipole interactions tha oxygen-containing compounds because N is low electro negative than O

不太懂黃色框框的內容 求解🙏

Increasing 25–2p interaction TI 2P O 2P 02s - 02p interaction causes energy splitting. Op goes to higher energy, 02s goes to lower energy. 02s Energy 25 O2, F2, Nez B2, C2, N2

求解法 謝謝 （普通物理）

1. Consider a particle moving with the acceleration vs. time graph as in Fig. 1. a, and to are constants with unit in m/s2 and s. Assume the particle is at rest and at origin (L) at t = 0. (a) Find the velocity v(t) for each interval (i.e. 0<t< to, to <t< 2to, 2t, <t (b) Find the displacement x(t) of the particle for each interval. (c) What are the velocity and displacement of the particle at t = 3t0? Fig. 1 an 2ao w ao to to 8:03 来搜寻 co 33°C D

求解答案是否正確

Multiple-choice questions: (70 points) write the letter of statement that is not true: 1. A.B.U The Drude Model: (a) It is a classical approach using concepts from the kinetic theory of gases. (b) A relaxation-time approximation is used where the probability of collision is l/t. (c) No forces act on the electrons in between collisions. (d) It predicts accurately the electronic heat capacity of metals. 2. The Sommerfeld Model: (a) The crystal potential is replaced by an average Coulomb potential. (b) The separation of states is so close that a continuum model can be applied. (c) The electrons are highly localized due to a strong crystal potential. (Q) The energy of the highest occupied state at 0 K is the Fermi energy. 3. Density of states in k-space, N(k): (a) N(k) is determined by the boundary value conditions. (b) For lattices in any dimensions, N(k) is constant in k-space. (C) N(k) depends on the direction and magnitude of k. (d) It is directly proportional to the volume of the crystal. E影響, c 4. The Fermi surface of a metal: (a) is responsible for many of the transport properties of the metal, (b) depends on the nature of the chemical bonds, (c) is always a sphere, (d) can involve mixing of electron orbitals. ✓ 5. The conductivity of a material () increases with the mobility of its carriers, (b) increases with the density of carriers, (C) it is inversely proportional to the energy gap. cogu changes with temperature. 6. BID Plasmons: (a) They are an important characteristic of the Sommerfeld electron gas model. (b) Plasmons occur spontaneously in metals. (c) They are related to charge density oscillations. (d) The Plasmon energy is typically of the order of 10 eV. The Fermi energy Ef in intrinsic semiconductors 8) is usually close to y E, at OK (b) it ACiD. can increase or decrease with temperature depending on the ratio of hole and electron effective masses, (c) it represents the point at which the probability of occupation is 12, even though there may not been any states with that energy, (d) its value relative to the electronic bands must remain unaffected in the presence of defects or interfaces.

e.f.g這三題不知道要如何解釋，請各位大神幫忙解題謝謝

1-8. Consider two inertial reference frames. When an observer in each frame measures the following quantities, which measurements made by the two observers must yield the same re- sults? Explain your reason for each answer. (a) The distance between two events (6) The value of the mass of a proton (c) The speed of light (d) The time interval between two events (e) Newton's first law (f) The order of the elements in the periodic table (g) The value of the electron charge

大一普物 請問第10題要怎麼寫？ 尤其是(b)的角度表示我不太會

V 1 Vy A basketba]l player is 15 f horizontally from the center Of the basket, which is 10 了 of ffhe ground. At whatcangle should the player aim the ball from a height of 8.2 ft with a speed of 26 ft/s2 A diver leaves a 3-m board on atrajectory that takes her 2.5 m above the board and then into the wafter ~.8m horizontally from the end ofthe board. At whatspeedl and angle did she leave the board? (3) Show that the position of a particle on a circele_of radius AR With_its center at the origin 1s 品 (eos 你+sin 97 。Where @ is theangle the position vector makes with thex-axis. (b) Ifthe particle is 同 自 全 Inoves-with-constant' Speed y Starting on the x-axis at / 三0, find an expression for 9 interms oftime7 and the period 7/to complete a full circle. (c) Find the magnitude and direction of the acceleration. 訂上若

大一普物 請問第9題要怎麼寫

區9. 10. 一 六 余 條 監工 選hor A basketbal] player is 15 了 horizontally from the center Qf the basket, which is 10 ft off the ground. At whatangb should the player aim the ball from aheight of8.2 ft with a Speed of 26人/s? A diyer leaves a 3-m board on a trajectory that takes her 2.5 m above the board and then into the water 2.8m horizontally from the end ofthe board. At whatspeeil and angle did she leave the board? 半生 (3) Show 也at 了e position of a particle on a circle_ of radius AR With its center at the Orlgin 1S 7三[cos +sin9史, where 幻 is the angle the position vector makes with thex-axis. (b) IFthe partlcle Inoves With constant speed y Starting on 了he x-aXis at /三0, find an expression for 9 interms oftime / and the period 7to complete a full circle. (c) Find the magnitude and direction ofthe aeeeleration.

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.

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

求解48

atime interva3 s by accelerating for a teely brak- 2 i liate: AA atarate wi 三 0.100 m/s? and then 一絢 intervat ing with acceleration 2 二 一0.500 m/s for ce Az. Find the minimum time interval of trave tnle interval A- alls to the !/49>@A hard rubber ball, released at chest height, f 人 贍ee and bounces back to nearly the same helg 則 When 翌is im contact with the pavemene the lower 上de 匣ce pa is temporarily Hattened. Suppose the maximurm qep征 of the dent is on the order ofl cm. Cormpute am order-ofmagnitude estimate_ for the maximum aceeler2- fion of 症e ba while it is in contact with_the paverment. State your assumptions, the quantities you estimate, and 匝e vaJues you estimate for them. /9.7 An quisitiyve physics student and mountain climber Clmps a 50.0-m cliff that overhangs a calm pool of water. 刁e 出rows two stones 1 d apart, and observes that 1有店沿 WDnWar