請問都是過去式嗎

DI at Elsa and tried to get her att but she didn't see me. store park Sorry, I didn't hear you clearly. Could you what you said? wave Sam had to buy a new umbrella because he his umbrella on the bus yesterday. repeat in a cool, leave The medicine should be dry place and kept away from children.

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?

第五題

【高二下海山 109-1】課外閱讀 1. in 3. Kindergarten classes always take place in a classroom, right? Well, for kids Europe, that is not always the case. Rather in a regular classroom, some 3-6-year-olds have class entirely outside. These “forest kindergartens” have across Europe over the past fifty years. The basic idea behind them is that most kids spend too much time indogts, Wolre they with plastic toys and stare at screens. At forest kindergartens, the kids get a chance to spend hours at a time in nature. 9. Despite the different environment, the purpose of forest kindergartens is pretty much the same as that of indoor Ones: to take care of and educate young children. Studies show that 6. is valuable for kids to spend more time outside. This prooldusa great (d opportunity for them to learn many things. These can include practical skills such as on the top of that finding their way in the woods and identifying plants and animals. 8. , the kids their time outside, as they run, play, and experience the outdoors with all of their senses. These experiences make them healthier and more comfortable in a natural setting. By giving kids greater 10. nature, forest kindergartens are improving their lives. Do you think forest kindergartens would work in your country? B)1. (A) situating (B) residing (C) laying (D) specializing (A) Owing to ODER (B) Apart from ( Rather than (D) Except for (D) 3. Promo 2713 (A) risen above (B) (747 (D) made waves Abe (A) where ) (B) whereas 7 10 (C) what (D) which (A) that B) it (D) what (B) pa... I UBE 123 baded on (C) torn apart ABE BIDO one Athin ( what (C) it (D) there

急不會寫！翻譯不會翻

一字多義B313 shake 「握手、搖動(v.) 奶昔(n.) half 一半(n.) 一半的adj.) past strange 經過(v.) 過往(n.) 奇怪的(adj.) 過去的(adj.) 陌生的(adj.) bright 晴朗、明亮的 靈巧的(adj.) kid 小孩(n.) 開玩笑(v.) stop 停止(v.) 站牌(n.) Wave 揮(手)(v.) 海浪(n.) back miss 回原處(adv. 錯過(v.) 後面的(adj.)後面(n.) 想念(v.) ) )

光學第3題（2.38）請問如何解選項c🙏

3.00 85 09:49 ul. RES Optics Homework 1...748220677e2a.pdf ka KI : 。 Optics Homework 1 1. 2.2* Show that the function $(y, t) = (y – 40) is a solution of the differential wave equation. In what direction does it travel? 2. 2.6 How many wavelengths of a green laser (1 = 532 nm) can fit into a distance equal to the thickness of a human hair (100 um)? How far will the same number of waves extend if they originate from a micro- wave oven (v = 2.45 GHz)? 3. 2.38 Which of the following expressions correspond to traveling waves? For each of those, what is the speed of the wave? The quanti- ties a, b, and c are positive constants. (a) (z, t) = (az – bt)? (b) y(x, t) = (ax + bt + c)2 (c) 4(x, t) = 1/(ar? + b) 4. 2.43 Write an expression for the wave shown in Fig. P.2.43. Find its wavelength, velocity, frequency, and period, Figure P.2.43 A harmonic wave. I=0 40 100 300 500 -20 401 -60 0.66 X 10-15 (nm) 100 300 500 I = 1.33 X 10-15 (nm) o 二

沒有頭緒，請問怎麼解題🙏

5. 2.56* Show explicitly, that the function ř, t) = A exp[i(:Ť + wt + ε)] describes a wave provided that v = w/k. -

有人知道我是哪裡算錯嗎(ಥ_ಥ)

= 78, When the electron in a hydrogen atom falls from the n= 3 excited energy level to the ground state energy level, a photon with wavelength 2 is emitted. An electron having x this same wavelength would have a velocity of A) 7.10 x 10 m/s. D) B) 2.93 x 10 m/s. E) C) 2.93 x 103 m/s. Ans: A Category: Medium Section: 7.4 7.10 m/s. 3.00 x 108 m/s.

為什麼不是E

Q搜尋 07.pdf Chapter 7: Atomic Structure and Periodicity 1. When ignited, a uranium compound burns with a green flame. The wavelength of the light given off by this flame is greater than that of A) red light B) infrared light C) radio waves D) ultraviolet light E) gamma rays ANS: D PTS: 1 DIF: Easy REF: 7.1 KEY: Chemistry | general chemistry | atomic theory light | electromagnetic radiation MSC: Conceptual 2. Which form of electromagnetic radiation has the longest wavelengths? A) gamma rays

請問一下這題怎麼算😭好難

Vout - 5 volt D2 +5 vol o Vout D OVORI = Vout == 4.310 v ok suming the diodes are | (b) tions shown in Figure P9.23 D -9.3 大 li (c) WO Do V 12 +7 V o bin 88. I won T08 . 9.24 Sketch the output waveform and the voltage transfer characteristic for the circuit of Figure P9.24. Assume an ideal diode, us (t) = & sin (it), V, = XV, Ri = 812, and R2 = $ 12. 10 4 lo lo mm ogiloc www bools boRi t V. -Vo 15 k12 15 k92 1 vs borbo R2 V 4V V c) (d) bagnozib Figure P9.24 OU 29,22, find the range of Vin 25 Repeat Problem 9.24, using the offset diode model

經濟學 第二章 The Economic Problem 主要想請教第十九題的c和d 僅先致謝沈

malaria cases on the y-axis. On your graph, (1) Draw a marginal cost curve and a marginal benefit curve that are consistent with Bruno Moonen's opinion. (ii) Identify the quantity of malaria eradicated that achieves allocative efficiency. 1 ? Gains from Trade Use the following data to work Problems 18 and 19. Fadi can produce 10 baklavas (a Turkish pastry) or 250 bars of chocolate an hour. Hania can produce 30 baklavas or 90 bars of chocolate an hour. 18. a. Calculate Fadi's opportunity cost of a baklava and Hania's opportunity cost of a baklava. b. If each spends 30 minutes of each hour baking baklavas and 30 minutes producing chocolate, how many baklavas and chocolate bars does each produce? c. Who has a comparative advantage in produc- ing (1) baklavas and (ii) chocolate bars? 19. a. Draw a graph of Fadi's PPF and Hania's PPF and show the point at which each produces when they spend 30 minutes of each hour producing baklavas and 30 minutes producing chocolate bars. b. On your graph, show what Fadi produces and what Hania produces when they specialize.