https://webassign.org

 Forgot password?
 Register Now

 

      

Upload Images

Unused Images

Tips: allowed image types are: gif, jpg, jpeg, png, webp; When uploading is finished, thumbnails will be generated and shown above. You can either double click on the thumbnail or simply drag the thumbnail with your mouse, the image will be bound to the current problem and displayed below it.

Used Images in Current Log

Tips: What is shown in this column are all the images associated with this exam log. Those bound to a particular problem will also be displayed immediately underneath it; Deleting any images will make them to be transfered to the "Unused images" category.


PRACTICE：Physics Unit32: Elementary Particles
本Practice来源于https://webassign.org，是在线Practice的打印版，您也可以访问本平台网站(https://webassign.org/)直接在线完成(注册并登录账号后在首页左侧输入试卷号 331 即可在线作答)，，作答电子化后可随时回放，查看每题答案与详细解析，搜藏保存任意题目；教师使用本平台可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力。本试卷的直接作答链接 https://webassign.org/test331.html
 Author: physics  Publish Date: 2023-05-02 09:34    Total Marks: 43 mks  Marks Awarded: _____________

User Name: No Login  Start Time: 23年05月02日 09:34  Switch to Whole-Paper Mode

Mark Problem
1#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What happens to the cyd3 g8v:nnfj p ,t.q,*yvt 4mzqclotron frequency of a charged particle if its speed doublesjgq.ttvynfqd48,z*nv3 p m,: ?

Correct Answer:    
Mark Problem
2#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What happens to the cyclotron frequency of a charged parl tt8 gshp 8d8b ud.cy3:4yj7xw5d)frticle if the radius of its path dc 8r3w.f pds8g8 udyl:47tbx j5)hd tyoubles?

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
3#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The Feynman diagram s4:6f ikpfpf2uhows two electrons approaching each other, interacting, and then leavinpfpk 2:6uf4f ig each other. What particle is being exchanged during the interaction?


Correct Answer:    
Mark Problem
4#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The Feynman diagram shows the weak interaction ofm+ s.xoc/vfl y6a(u*du4k6u j a neutrino ($\nu$) and a neutron ($n$), mediated by a $W+$ particle. The interaction produces an electron ($e-$) and another particle. What is the other particle?


Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
5#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A positively charged electron iv ;snx(ff6 y3cs

Correct Answer:    
Mark Problem
6#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What effect does an increase in the mass of the virtual exchanmdgyg k du*nk;q43+o* ge particle have on the range of the force it mediates?k dm*y;k+g 3o*n4q dug

Correct Answer:    
Mark Problem
7#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  An exchange particle forvo-o k; 5oib8ajzf0g 5l/be3pj89zbsbz o z/ : the weak force is the

Correct Answer:    
Mark Problem
8#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The exchange particles for the weak force are very massive (about 100 times as m,b pqcswt/(a wjmh)-a.z54r massive as a proton). This would lead one to expect that the weak fq/. b sjm4z-ap5wm)ta,w r(hcorce would

Correct Answer:    
Mark Problem
9#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The exchange particle for quarks is calleq xiggxa9 jc hk-(ial5l* n5;/gqqi:8d

Correct Answer:    
Mark Problem
10#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A particle that travels at the speed o9 nd9gg z4xe*if light

Correct Answer:    
Mark Problem
11#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  One reason a photon could not create an odd number of electrons and t+(n/vxpk qby 1v.v2 npositrons is that q xy tk/nv1 2bvn(v+p.such a process would

Correct Answer:    
Mark Problem
12#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Is the following decay permij i6-luy.mpq3y, sv +vssible? $\Sigma^+ \rightarrow \Lambda^{\circ} \;+\; \pi^+$

Correct Answer:    
Mark Problem
13#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Is the following decahqs :npvd6p) .y allowed? $\Sigma^+ \rightarrow p \;+\; \pi^+$

Correct Answer:    
Mark Problem
14#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Is the following decay allowed? 3v dnhg f*xupmlyt4 9tmby--5y vy/23$\pi^{\circ} \rightarrow \mu^+ \;+\; \nu_{\mu}$

Correct Answer:    
Mark Problem
15#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The neutrino has

Correct Answer:    
Mark Problem
16#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  An electron is an expy1pslnbw* 0cd7t ;,mhm/ +lsample of

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
17#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A proton is an exampleqwzj, s loasa 5m69z;vte *tv:x4/sx) of

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
18#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A neutron is an example vz6d 07zv m6 v-wg*f-a)oko1tozq sotq0w08sof

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
19#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A photon is an exampe5 9 g g mlabt*y*utg(m*7da8vle of

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
20#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Particles that do not interkgt+ p0k t8d5oact via the strong force but do interact via the weak nuclear force (and presumably by the much weaktd 8k 5otpg0+ker gravitation force) are called

Correct Answer:    
Mark Problem
21#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Hadrons are divided into two sup10bjl0u+ ps5ou a8orbgroups called

Correct Answer:    
Mark Problem
22#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A quark is

Correct Answer:    
Mark Problem
23#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the quark comp5g t0inq,5-t ,khqa htosition of a $\Lambda^{\circ}$?

Correct Answer:    
Mark Problem
24#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A distinctive feature of quabuig(3fi1epq7 / vx0o6kjgo 0rks is that they

Correct Answer:    
Mark Problem
25#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The charge of some quarks and antiquaicgp*4e 0f9 cbrks is

Correct Answer:    
Mark Problem
26#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When a quark emits or absorbs a gluon, the g0-ea v2g2*r -j hrbzuquark changes

Correct Answer:    
Mark Problem
27#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The number of types of quarks iw3u xybunb5 .quks (.7s

Correct Answer:    
Mark Problem
28#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Which of the following is not considered to be one of the four fundamet wppv0; 4q.2ce1dfpo15cdl qntal force1vpcwppqd5tdo; .lfe4021cq s?

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
29#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A significant step in "--pax1r xjls3:o ef r+unifying" the forces of nature was the discovery that two of the so-called fundamental forces were two parts of a single force. The two forces that were so unified w-x xafopsrl3+j r e-1:ere

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
30#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The grand unified theory (GUTgeyt le0yi9e4 v)ewj8o +q;i4) is a sought-after model that would unify three of the four forces of nature. Which force is the one it would n9o)e08wileyg jv i q4 y4tee+;ot include?

Correct Answer:    
Mark Problem
31#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  What is the wavelength for a beam of gqxj b,x,wbv-e1q67 d1.4 GeV electrons?

Correct Answer:    
Mark Problem
32#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A cyclotron operates at 10 MHz. What magneticr-ajl/ 7wg;vzkbkr 5 7 field is needed to accelerate protons?- vk a7l5rgzb7/jwkr;

Correct Answer:    
Mark Problem
33#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A cyclotron of radius 0.25 m accelerates protons in a 1.7-T mf) ge,po2de5qh222d fvyzu-n agnetic field. What is th)2 f 22 , ep2dvgzdo-5eyuqhnfe frequency for the applied alternating voltage?

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
34#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A cyclotron of radius 0-*ll)fob vq/3y a a ju63jx0tw.25 m accelerates protons in a 1.7-T magnetic field. What is the kinetic energy of the protons when they leave the cyclotrjuatlfqob -j3yx0 aw/l v3 *)6on?

Correct Answer:    
Mark Problem
35#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  A deuteron has the sx3 xmzaie.-k2ame charge as a proton but approximately twice the proton mass. Suppose deuterons are beakx m3.e x2z-iing accelerated in a cyclotron in an orbit of radius 75 cm at a frequency of 8.0 Mhz. What magnetic field is needed?

Correct Answer:    
Mark Problem
36#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Suppose you were to try to crea0n)/j ) r -d14cf pjnzdtium6ete a proton-antiproton pair by annihilation of a very high energy photon. The proton and the anti-proton have the same masses, but opposite charges. What energy photon would be req 1 6nj0/dpj )-cm4rtdfunz)eiuired?

Correct Answer:    
Mark Problem
37#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  When a positronium atom (electron + positron) decays, it emits two phot;f9 klbpb qn8+4(lzpa at(,sd ons. What are tzbf,l tk(a;lnq9p 84d p(sab+he energies of the photons?

Correct Answer:    
本Practice全部题目来源于https://webassign.org，学生可自助刷题练习，扫右侧二维码加微信，获取学习资料，答疑辅导
教师可以抽题组卷或一键复制他人试卷，布置为在线考试或在线作业，全自动判分成绩一键排序导出，省时省力
Mark Problem
38#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The pe meson has a mass of 264iu0d8vsai+;h, r;l zgz t5*md times that of an electron. What is the range of the force mdrg0+, i ;z8zvd*ihltsa;5 umediated by this particle?

Correct Answer:    
Mark Problem
39#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Calculate the range of a hypothetical force with the proton as the virtuag01wqr 4 ij,inl exchange pan0 4,igi jwr1qrticle.

Correct Answer:    
Mark Problem
40#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Identify the missing particle in the follo9gple1 *hijs(. hu wl)wing reaction.
$\pi^- \;+\; p \rightarrow \pi^- \;+\; \pi^- \;+\; \pi^+ \;+\; \;\;\;\;\;\;$ ?

Correct Answer:    
Mark Problem
41#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Identify the missing parr +ojs rq8 i+sxrl-27eticle in the following reaction. $\pi^+ \rightarrow \mu^+ \;+\; \;\;\;\;\;\;$ ?

Correct Answer:    
Mark Problem
42#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  Identify the missing particle in dayv n f)4j;j/b,c/f hhvb :s2k.afp5the following reaction. $\pi^+ \;+\; \Lambda^{\circ} \rightarrow \Sigma^+ \;+\; \;\;\;\;\;\;$ ?

Correct Answer:    
Mark Problem
43#
 
Single-Choice ( 1.0 marks) Whole-Paper View Save Problem  
  The number of quarks in iaer (appkc, h 7fs i*y9 6x-p8k:rjq9a deuteron ($^2 H$) is

Correct Answer:    
  • :
    •
    Total:43 mks Pass:25.8 mks Duration:Unlimited
    未答题: 已答题:0 答错题:
    当前第 题，此次Practice共有 43 道题

    试卷内容到此结束!   © 2024 https://webassign.org版权所有

    Archiver|Mobile Version|Jailroom|https://webassign.org

    2025-1-11 20:46 GMT+8 , Processed in 0.138664 second(s), 98 queries , Redis On.