近代物理求解：

Problem 28. Consider the process A* + A+), and A* is stationary (at rest). This is the process that an excited atom emits a photon and goes back to the ground state atom A. Assume that the excited atom has a rest mass M6. Show that v-mi (loro) hvo (4.3.14) = 1 2M where v is the photon frequency if the recoil is taken into account, and vo is the photon frequency if the recoil is not taken into account.

普通物理 想請問這題該如何計算呢？ What vertical launch speed is necessary to get a rocket to an alti-tude of 1200 km? 答案為4.45km/s

（普通物理）想請問這題該如何解🙏

10. A particle moves from the origin to the point x = 3 m, y=6 m along the curve y = ax_ - bx, where a = 2 m' and b = 4. It's subject to a force cxyî + dị, , where c = 10 N/m² and d = 15 N. Calculate the work done by the force. c - - -

大學物理 功

課堂練習 1.如果你在超級市場用75N的力水平推一部購物車在走道上移 動了12m,你做了多少功? 2.一部起重機將一支重650kg的横垂直舉起23m高,接著起 重機轉向東邊移動了18m,求起重機所做的功。忽略摩擦力並 假設起重機以固定的速率移動。 3.如圖所示,一人以大小為30牛頓的力拉貨量5kg的物體,而 使物體在無摩擦力之水平面上移動2m,請問此人做多少功? 2021 Pearson Education Ltd. All Rights Reserved

普物的熱力學章節，能用不是全屬地科的內容解釋嗎🥲感恩

4. 為何鯨魚魚群冬天習慣回到北方產小鯨魚,而夏天則往南方走,請以熱力學 說明之? Why whales are used to returning to the north to produce small whales in winter, but go south in summer, please explain with thermodynamics?

求解🙏

The two masses shown in Figure are connected by three massless and frictionless pulleys. What is the magnitude of ai / a2 ? a 411 2 a2

這題有點看不懂

ch3-2DMotion pptx - PowerPoint 投影片 基於业山保 信 Acrobat 20 As = = == = BTU SA ===== 位木匠在8.8m高的屋頂上以11m/s的速率在水平方向丢出一 - H (a)木瓦落地所需的時間為何? (b)木瓦在水平方向的移動距離有多遠Joy = 0 Vo = Uox toy ) Vo = 31 m/s > 大 Jay Vox=31 m/ allow ox= Vent + karte of exarang (4-0) = Vo A (T 60.589 =

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

[大二物理系 應用數學］ 想問我的過程有哪裡錯了呢～因為跟答案不太一樣～謝謝🙏

dy dx + tan (sal) Vix)= y x dcux) doo st t tan v ft x. du i dsinu Tanv do 圣 ² dx enpolt é sinu + c en/sinol = ln 101 sin 1 y y = x + e" xo sint (sin / sint (xre) 7 y = x sin" (x+)= sin" (x+C) but ang : y = x sin "AX (A : const)

求解10xBSA怎麼解？

Exercise 1 • A5 kb plasmid DNA has two Bam HI sites. You would like to use this enzyme to digest 5ug of this DNA. How would you do? (DNA concentration: 2 mg/ml) Bam HI concentration: 20000 U/ml Unit definition of Bam HI: 1 unit enzyme can completely digest 1 ug of lambda DNA at 37 °C in 1 hour. (lambda DNA has 48500 bp and 5 Bam HI sites) The reaction needs supplement with 100 ug/ml bovine serum albumin (BSA, 10x concentration) • Calculate the volume of all ingredients and setup the reaction table.