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src="static/image/common/rec_subtract.gif" alt="反对" />反对<span id="recommendv_subtract">0</span></i></a> </div> </td> <td valign="top" class="album_side_r"> <div class="album_side"> <div class="hm mtn mbn"> <a href="http://club.oecr.com/space-uid-10349.html" target="_blank" class="xi2"><img src="http://www.oecr.com/uc_server/avatar.php?uid=10349&size=small" /></a> <span class="tit_author"> <a href="http://club.oecr.com/space-uid-10349.html">刘武青</a> </span> </div> <div class="date"><span>发布时间:</span> 2012-8-12 16:01</div> <div class="album_info"> <h3>正文摘要: </h3> <p>北相会十年庆双会优秀论文 </p> </div> </div> </td> </tr> </table> </div> </div> <div class="bm vw pl" id="comment"> <div class="bm_h cl"> <h2>回复</h2> </div> <div class="bm_c"> <div id="postlistreply" class="xld xlda mbm"><div id="post_new" class="viewthread_table" style="display: none"></div></div><div id="post_1030803" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-10349.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=10349&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-10349.html" target="_blank" class="xi2">刘武青</a><em id="author_1030803"> 发表于</em> <span class="xg1 xw0">2012-8-15 22:11:44</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1030803"> <div class="quote"><blockquote><font size="2"><font color="#999999">wcq1224 发表于 2012-8-13 07:27</font> <a href="http://bbs.oecr.com/forum.php?mod=redirect&goto=findpost&pid=1030273&ptid=252702" target="_blank"><img id="aimg_LV4iV" onclick="zoom(this, this.src, 0, 0, 0)" class="zoom" file="static/image/common/back.gif" onmouseover="img_onmouseoverfunc(this)" lazyloadthumb="1" border="0" alt="" /></a></font><br /> 怎么你的摘要里的第一句话就有错别字。。。。</blockquote></div><br /> 笔误.<br /> 应为同一高度.</td></tr></table> </div> <div id="comment_1030803" class="cm"> </div> <div id="post_rate_div_1030803"></div> </div> </dd> </dl> <script type="text/javascript" reload="1"> aimgcount[1030803] = ['LV4iV']; attachimggroup(1030803); </script> </div> <div id="post_1030801" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-10349.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=10349&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-10349.html" target="_blank" class="xi2">刘武青</a><em id="author_1030801"> 发表于</em> <span class="xg1 xw0">2012-8-15 22:06:52</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1030801"> 刘武青多次实验，证明了：地球自转方向是摆的摆动周期影响因素之一。 <br /> 摆的摆动方向影响摆动周期。 <br /> 给著名科学家伽利略摆的运动实验加补丁，补充说明摆的摆动周期与摆的摆动方向有联系。 <br /> 同一个摆，在同一地点，同一高度，摆的摆动方向不相同，摆动周期不相同。 <br /> 摆动方向改变，摆动周期随之改变。其原因是，地球由西向东转动，赤道的线速度每秒400多米。摆的摆动周期受地球自转方向的影响。 <br /> 摆可以平行地球自转方向摆动，也可以垂直地球自转方向摆动。<br /> 傅科摆没有涉及到摆的摆动方向影响摆动周期<br /> 以下转帖<br /> 为了证明地球在自转，法国物理学家傅科（1819—1868）于1851年做了一次成功的摆动实验，傅科摆由此而得名。实验在法国巴黎的一个圆顶大厦进行，摆长67米，摆锤重28公斤，悬挂 <br /> 点经过特殊设计使摩擦减少到最低限度。这种摆惯性和动量大，因而基本不受地球自转影响而自行摆动，并且摆动时间很长。在傅科摆实验中，人们看到，摆动过程中摆动平面沿顺时针方向缓缓转动，摆动方向不断变化。分析这种现象，摆在摆动平面方向上并没有受到外力作用，按照惯性定律，摆动的空间方向不会改变，因而可知，这种摆动方向的变化，是由于观察者所在的地球沿着逆时针方向转动的结果，地球上的观察者看到相对运动现象，从而有力地证明了地球是在自转。傅科摆放置的位置不同，摆动情况也不同。在北半球时，摆动平面逆时针转动；在南半球时，摆动平面顺时针转动，而且纬度越高，转动速度越快；在赤道上的摆几乎不转动。傅科摆摆动平面偏转的角度可用公式θ°=15tsinφ来求，单位是度。式中φ代表当地地理纬度，t为偏转所用的时间，用小时作单位，因为地球自转角速度1小时等于15°，所以，为了换算，公式中乘以15。 北京天文馆大厅里也有一个巨大的傅科摆，时时刻刻提醒人们，地球在自西向东自转着。 无论我们认为地球是绕自身轴旋转，或者认为是恒星绕地球旋转而地球处于静止，这都是无关紧要的。 ——马赫 </td></tr></table> </div> <div id="comment_1030801" class="cm"> </div> <div id="post_rate_div_1030801"></div> </div> </dd> </dl> </div> <div id="post_1030273" class="xld xlda mbm"><dl class="bbda cl"> <dd class="m avt"><a href="http://club.oecr.com/space-uid-33845.html"><img src="http://www.oecr.com/uc_server/avatar.php?uid=33845&size=small" /></a></dd> <dt> <span class="y xw0"> </span> <a href="http://club.oecr.com/space-uid-33845.html" target="_blank" class="xi2">wcq1224</a><em id="author_1030273"> 发表于</em> <span class="xg1 xw0">2012-8-13 07:27:58</span> </dt> <dd class="z"><div class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1030273"> 怎么你的摘要里的第一句话就有错别字。。。。</td></tr></table> </div> <div id="comment_1030273" class="cm"> </div> <div id="post_rate_div_1030273"></div> </div> </dd> </dl> </div> </div> </div> </div> <script type="text/javascript"> new lazyload(); </script> <div class="wp mtn"> <!--[diy=diy3]--><div id="diy3" class="area"></div><!--[/diy]--> </div></div> </div> <!--autocomment filter by maxnum--> <div class="ft_wp"> <div id="ft" class=" cl"> <div id="flk" > <p> <a href="http://wpa.qq.com/msgrd?V=3&Uin=20600600&Site=光电工程师社区&Menu=yes&from=discuz" target="_blank" title="QQ"><img src="static/image/common/site_qq.jpg" alt="QQ" /></a><span class="pipe">|</span><a href="http://m.oecr.com" 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