2. Eric uses a computer software to simulate a 20-residue peptide in different structures. Structure A is an a-helix structure; structure... 繼續閱讀

請問這題什麼意思

noijasuk 31. Which of the following are exact numbers? a. There are 100 cm in 1 m. exact Wild songnsitib sdT VI sons b. One meter equals 1.094 yards. inexact sowied c. We can use the equation exactam silinside of .05 °F = ²/°C + 32 Insom badtam the to convert from Celsiue to Fahrenheitri edi airlax A alismaiz numbers and 32 exact or inexact?ib sai tedW .SS d. π = 3.1415927. in exact fions

求解 為什麼動量不需要代速度值？🤔

6.51 Using Heisenberg's uncertainty principle, calculate the uncer- tainty in the position of (a) a 1.50-mg mosquito moving at a speed of 1.40 m/s if the speed is known to within £0.01 m/s; (b) a proton moving at a speed of (5.00 + 0.01) X 104 m/s. (The mass of a proton is given in the table of fundamental constants in the inside cover of the text.) (a) Ax >= h bar /24p = 6.626*10-34/(1.5*10-6*0.01)/41 = 4/41*10-27 m (b) Ax >= h bar/24p = 6.626*10-34/(1.67*10-27*0.01)/41 = 3/41*10-10 m *

求解

Using Heisenberg's uncertainty principle, calculate the uncer- tainty in the position of (a) a 1.50-mg mosquito moving at a speed of 1.40 m/s if the speed is known to within +0.01 m/s; (b) a proton moving at a speed of (5.00 + 0.01) x 104 m/s. (The mass of a proton is given in the table of fundamental constants in the inside cover of the text.)

力學 救救我 謝謝！（第三題不用）

1. Considerathin rod ofuniform linear mass density pL with mass 4/ and length /, find the gravitational potential。dp/有)。at a perpendicular distance Afrom the center ofthe rod. You may find the integral in (E.6) in Appendix E useful 2. A spherical planet of radius 人> consists ofacore of radius 有/ with uniform density pi. and a thick outer cloud of dust with umiform density p: Find the force (magnitude and direction) onamass箇inside the dust cloud ata position ARp from the planetcenter( 吃<訪<記), 3. Use Fermat's principle by applying calculus of variation to minimize the time oflight passing from medium ofrefractive index jg, to another medium ofrefractive index >, derive the Snells law ofrefraction: js光 名2s 銷 4. Consider the Atwood machine oftwo masses connected by amassless string oflength 7overapulley ofradius gas shown, (a) Write down the total kinetic energy and potential energy in terms of the coordinatex Hence obtain the Lagrangian ofthe system. (b) Derive the Lagrange's equation of motion and hence find the acceleration ofthe masses. x 和二 工

一直算都錯😖，求解

Problem: relative to 丸 Is om always smaller than zz, larger than we orthe same Ph as uu, or does it have sorme other shed k 中 Telationship? COTn- TeaS,。 (4 Lisa rushes down onto a subway 7? 1the Platform to find her train already 主 leparting. She stops and watches b the cars go by. Fach car is 8.60 m ( 語 long. The first moves past her in 站 1.50 sand the second in 1.10 5. 實 Find the constant acceleratlion Of 時 則 thetralin. With )eSlt CHALLENGE PROBLEMS np lt hes is 42. Two thin rods are fastened to ~e on the inside of a cCircular TIng as shown in Figure P2.42. One rod of length Dis vertical, and 17th the other of lenoth 了 makes an

請問B為什麼是對的？

7. Which ofthe following Statements is Ase? 【106 台聯大(Al基 (用) an orbital can accommodate at mosttwo eleetrons. (8) the eleetron density atra.pointis proportionalto 2 atthat point. S) (G) the spin quantum number ofan electron must be either +1/2 or -1/2, (D) a 2p orbital is more pentrating than a 2s ; that is, it has a higher electrgi density near the nucleus and inside the charge cloud ofa 1s orbital, (R) in the usual order of filling, the 6s orbial is filled before the 4f orbital Ans.: (D)