求解！！！！！！！！！！！_百度知道
求解！！！！！！！！！！！
边L形导线框质量m由高度H处自由落图所示其边ab进入匀强磁场区域线圈始减速运直其边cd刚穿磁场速度减ab边进入磁场速度半匀强磁场宽度L线框穿越匀强磁场程产焦耳热Q（& & ）& A．2mgL& B．2mgL+mgH& C．2mgL+3mgH/4& D．2mgL+mgH/4
提问者采纳
根据能量守恒定律线圈减少机械能焦耳热初始位置机械能mg(H+2L)ab边进入磁场速度vmgH=1/2mv^2
v^2=2gHcd刚穿磁场速度减ab边进入磁场速度半所v2^2=1/4v^2=1/2gH所末位置能1/2mv2^2=1/4mgH势能0机械能1/4mgH焦耳热=初始机械能-末位置机械能=mg(H+2L)-1/4mgH=2mgL+3mgH/4选C
提问者评价
其他类似问题
为您推荐：
其他4条回答
C析：线圈自由落 H ab边刚落磁场边缘速度设V　V^2＝2gH由题意知cd边刚穿磁场速度　V1＝V / 2即　V1^2＝gH / 2 ab 边刚进入磁场边缘 cd 边刚穿磁场边缘程减少机械能等于增加焦耳热所求焦耳热　Q＝mg（L＋L）＋（m * V^2 / 2）－（m * V1^2 / 2）即　Q＝2mgL＋[ m *(2gH) / 2]－[ m * (gH / 2) / 2 ]＝2mgL＋（3mgH/4）
为啥呢~亲 求解释~
c我蒙地，。。。。。
参考资料：
C ，蒙的。
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁管理学问题 求解！！！！_百度知道
管理学问题 求解！！！！
Answer by circling the BEST correct answers below.1． ______________ is the process of creating an organization's structure.a. Human resource managementb. Leadingc. Organizing d. Planninge. Departmentalization2. According to the text, a(n) ______________ is the formal framework by which job tasks are divided, grouped, and coordinated.a.
mission statementb. environmental scanc. internal resource analysisd. organizational structure 3． Which of the following is not one of the six key elements in organizational design?a. work specializationb. departmentalizationc. chain of commandd. bureaucratic design e. span of control4 Which type of environment is best suited for mechanistic organizations?a. dynamicb. manufacturingc. serviced. combinatione. stable
5 A wine store that employs six people most likely has what kind of organizational structure?a. bureaucracyb. simple
c. functionald. divisionale. team-basedMichelle is a registered nurse in charge of a new unit in her hospital. She would like to have a more laid-back approach to dealing with her new staff, but the hospital demands that there are strict hierarchical levels and that all decisions must be signed off by Michelle. Sometimes this drives M the constant filling out of forms, etc. She also feels that the numerous levels of hierarchy are unnecessary and place barriers between her and her staff. She isn't sure why things have to be so &organized& and is thinking about speaking with her boss to attempt changing her unit to have more flexibility and fewer rules.6. Michelle is concerned about her unit's ______________, the unit's formal framework by which job tasks are divided, grouped and coordinated.a. formal organizational chartb. organizational structure
c. staffd. span of controle. communication lines7. Michelle is required to sign off on all decisions, suggesting that they have a ______________ form of decision-making authority.a. centralized
b. formalc. autocraticd. policye. strict8 Michelle has noticed that everyone is very concerned about the ______________, the line of authority within the organization.a. responsibilityb. chain of command
c. span of controld. organizational strategye. environment9. Sales responsibilities divided into the southwest, midwest, southern, northern, and western regions would be an example of ______________ departmentalization.a. productb. geographic c. processd. outcomee. customer10. Bringing together the company's legal counsel, research engineer, and marketing specialist for a project is an example of a(n) ______________.a. empowered team.b. process departmentalization.c. product departmentalization.d. cross-functional team.
e. continuous improvement team.
提问者采纳
1.e; 2.d;3.d;4.e;5.e;6.b;7.a;8.a;9.b;10.d
其他类似问题
为您推荐：
管理学的相关知识
其他2条回答
问题真能知道
4：在以下各管理理论创始人中，被誉为“科学管理...4.与这个问题相关的所有人员 5.A+C 4：管理...1题选（4）2题选（2）3题选（2）4题选（1）5题
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁传奇私服登陆不上别的区又可以怎么回事 求解~！！！_百度知道
传奇私服登陆不上别的区又可以怎么回事 求解~！！！
我有更好的答案
登陆器问题,能补丁没打全问题..简单办重新安装热血传奇客户端!
没用，都试过了 别的区都行
发Q远程看看吧
还是远程好点
一目了然 有问题瞬间解决
估计是管理在合区
可能是你的端口错误有可能不是7000
其他类似问题
为您推荐：
传奇私服的相关知识
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁评论该主题
作者：您目前是匿名发表 &
作者：，欢迎留言
提示：用户在社区发表的所有资料、言论等仅代表个人观点，与本网站立场无关，不对您构成任何投资建议。用户应基于自己的独立判断，自行决定证券投资并承担相应风险。求解极限！！_百度知道
求解极限！！
提问者采纳
(1)lim&n→∞&(n/2)R²sin(2π/n)极限存(3)lim&x→0&arctan3x/sin2x=lim&x→0&(arctan3x)'/(sin2x)'=lim&x→0&[3/(1+9x²)]/(2cos2x)=[3/(1+0)]/(2×1)=3/2(5)lim&x→0&(1-cos4x)/(xsinx)=lim&x→0&[1-(1-2sin²2x)]/(xsinx)=lim&x→0&2sin²2x/(xsinx)=lim&x→0&2(2sinxcosx)²/(xsinx)=lim&x→0&8sin²xcos²x/(xsinx)=lim&x→0&8sinx/x=8(1)lim&x→∞&[x/(1+x)]^(x-3)=lim&x→∞&[1-(1/1+x)]^(x-3)=lim&x→∞&{[1+(-1/1+x)]^-(1+x)}^[(x-3)/-(1+x)]=e^lim&x→∞&[(-x+3)/(x+1)]=e^(-1)=1/e(2)lim&x→∞&[(2x+1)/(2x-1)]^x=lim&x→∞&[(2x-1+2)/(2x-1)]^x=lim&x→∞&[1+2/(2x-1)]^x=lim&x→∞&{[1+2/(2x-1)]^(2x-1/2)}^[2x/(2x-1)]=e^lim&x→∞&[2x/(2x-1)]=e(3)lim&x→0&(1+2tanx)^cotx=lim&x→0&[(1+2tanx)^(1/2tanx)]^(2tanx*cotx)=e²
你好样儿的
第一题第一问错了
提问者评价
太给力了，你的回答完美地解决了我的问题，非常感谢！
其他类似问题
为您推荐：
其他1条回答
太用等价穷或两重要极限
那你帮我做下第二题的1.3吧
等待您来回答
下载知道APP
随时随地咨询
出门在外也不愁}