ÌâÄ¿ÄÚÈÝ
£¨1£©£¨6·Ö£©ÈçͼËùʾ£¬Ò»Áмòгºá²¨ÑØxÖáÕý·½Ïò´«²¥£¬´Ó²¨´«µ½x="5" mµÄMµãʱ¿ªÊ¼¼Æʱ£¬ÒÑÖªPµãÏà¼Ì³öÏÖÁ½¸ö²¨·åµÄʱ¼ä¼ä¸ôΪ0.4 s£¬ÏÂÃæ˵·¨ÖÐÕýÈ·µÄÊÇ£¨ £©
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242225139284164.jpg)
E. ÈôÔÚQ(x="9" m)´¦·ÅÒ»½ÓÊÕÆ÷£¬½Óµ½µÄ²¨µÄƵÂÊСÓÚ2.5 Hz
£¨2£©£¨9·Ö£©ÈçͼËùʾÊÇÒ»¸ö͸Ã÷Ô²ÖùµÄºá½ØÃ棬Æä°ë¾¶ÎªR£¬ÕÛÉäÂÊÊÇ
£¬ABÊÇÒ»ÌõÖ±¾¶£¬½ñÓÐÒ»ÊøƽÐйâÑØAB·½ÏòÉäÏòÔ²ÖùÌå. ÈôÒ»ÌõÈëÉä¹â¾ÕÛÉäºóÇ¡¾¹ýBµã£¬ÊÔÇó£º
¢ÙÕâÌõÈëÉä¹âÏßµ½ABµÄ¾àÀëÊǶàÉÙ£¿
¢ÚÕâÌõÈëÉä¹âÏßÔÚÔ²ÖùÌåÖÐÔ˶¯µÄʱ¼äÊǶàÉÙ£¿
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242225159402775.jpg)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242225139284164.jpg)
A£®´ËÁв¨µÄƵÂÊΪ2.5 Hz |
B£®Èô¸Ã²¨´«²¥ÖÐÓöµ½¿íÔ¼3 mµÄÕÏ°ÎïÄÜ·¢ÉúÃ÷ÏÔµÄÑÜÉäÏÖÏó |
C£®ÖʵãQ(x="9" m)¾¹ý0.5 sµÚÒ»´Îµ½´ï²¨¹È |
D£®ÖʵãPÔÚ0.1 sÄÚÑز¨´«²¥·½ÏòµÄλÒÆΪ1 m |
£¨2£©£¨9·Ö£©ÈçͼËùʾÊÇÒ»¸ö͸Ã÷Ô²ÖùµÄºá½ØÃ棬Æä°ë¾¶ÎªR£¬ÕÛÉäÂÊÊÇ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222514599344.png)
¢ÙÕâÌõÈëÉä¹âÏßµ½ABµÄ¾àÀëÊǶàÉÙ£¿
¢ÚÕâÌõÈëÉä¹âÏßÔÚÔ²ÖùÌåÖÐÔ˶¯µÄʱ¼äÊǶàÉÙ£¿
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242225159402775.jpg)
£¨1£©ABC £¨2£©¢Ù
¢Ú![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222517547458.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222516720565.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222517547458.png)
ÊÔÌâ·ÖÎö£º£¨1£©ÓÉPµãÏà¼Ì³öÏÖÁ½¸ö²¨·åµÄʱ¼ä¼ä¸ô¿ÉÖªT="0.4" s£¬Ôò
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222518436704.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222519357546.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222520293753.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222521229749.png)
£¨2£©¢ÙÉè¹âÏßP¾ÕÛÉäºó¾¹ýBµã£¬¹âÏßÈçͼËùʾ.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242225220243184.jpg)
¸ù¾ÝÕÛÉ䶨ÂÉ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222522602896.png)
ÔÚ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222523413529.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242225242081064.png)
¿ÉµÃ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222524973721.png)
ËùÒÔ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222525987983.png)
¢ÚÔÚ
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824222526455526.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242225268601646.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408242225276721093.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿