ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿£¨6·Ö£©Ð¡·¼µÄ°Ö°ÖÔÚÍâ³ö²î¸øËý´ø»ØÀ´Ò»¼þС½ðÊô¹ÒÊΣ¨ÊµÐÄ£©£¬Ð¡·¼ÏëÖªµÀ½ðÊô¹ÒÊεIJÄÖÊ£¬ÓÚÊÇÔÚѧУʵÑéÊÒ½èÁËһЩÆ÷²ÄÀ´²â³öËüµÄÃܶȡ£
£¨1£©Ëý½«Ììƽ·ÅÔÚˮƽ×ÀÃæÉÏ£¬°ÑÓÎÂëÇáÇáµØ²¦ÖÁ±ê³ß Áã룬Îȶ¨Ê±·¢ÏֶַȱêÅÆÈçͼ¼×Ëùʾ¡£ÒªÊ¹ºáÁºË®Æ½Æ½ºâ£¬Ó¦½«ÓÒ²àµÄƽºâÂÝĸÍù £¨Ñ¡Ìî¡°ÓÒ¡±»ò¡°×ó¡±£©µ÷¡£
£¨2£©½«¹ÒÊηÅÔÚÒѵ÷ºÃµÄÌìƽÉϲâ³öÆäÖÊÁ¿Îª21.6g¡£
£¨3£©µ±ËýÏë²âÁ¿¹ÒÊεÄÌå»ýʱ·¢ÏÖÍüÁ˽èÁ¿Í²£¬ÔÚËý¾Úɥ֮ʱͻȻÏëµ½ÀûÓø¡Á¦µÄ֪ʶ¿ÉÒÔ°ï×Ô¼º½â¾öÎÊÌâ¡£ËýµÄ²âÁ¿¹ý³ÌÈçÏ£º
¢ÙÍùÉÕ±Öе¹ÈëÊÊÁ¿µÄË®£¬Óõ÷½ÚºÃµÄÌìƽ²â³öÉÕ±ºÍË®µÄ×ÜÖÊÁ¿Îª150g£»
¢ÚÓÃϸÉþ½«¹ÒÊÎ˨ºÃ²¢½þûÔÚË®ÖУ¨ÈçͼÒÒËùʾ£¬¹ÒÊβ»½Ó´¥±µ×£¬ÎÞË®½þ³ö£©£¬ÔÚÓÒÅÌÖмӼõíÀÂë²¢Òƶ¯ÓÎÂ룬µ±Ììƽƽºâºó£¬ÓÒÅÌÖÐíÀÂëºÍÓÎÂëµÄλÖÃÈçͼÒÒËùʾ£¬´ËʱÌìƽµÄ¶ÁÊýΪ g£¬Ôò¹ÒÊεÄÌå»ýΪ cm3¡££¨ÒÑÖª¦ÑË®=1.0¡Á103kg/m3£©
£¨4£©Ð¡·¼¼ÆËã³ö½ðÊô¹ÒÊεÄÃܶÈΪ g/cm3£»Í¨¹ý²éÃܶȱí¶ÔÕÕ¿ÉÖª¸Ã½ðÊô¹ÒÊοÉÄÜÊÇ ÊÎÆ·¡£
ÎïÖÊ | ½ð | Òø | Í | Ìú | ÂÁ |
ÃܶÈkg/m3 | 19.3¡Á103 | 10.5¡Á103 | 8.9¡Á103 | 7.9¡Á103 | 2.7¡Á103 |
¡¾´ð°¸¡¿£¨1£©×ó¶Ë ÓÒ £¨2£©152.4 2.4 £¨3£©9 Í
¡¾½âÎö¡¿
ÊÔÌâ·ÖÎö£º£¨1£©ÌìƽÔÚʹÓÃÇ°£¬Ê×ÏȽ«Ììƽ·ÅÔÚˮƽ×ÀÃæÉÏ£¬°ÑÓÎÂëÇáÇáµØ²¦ÖÁ±ê³ß×ó¶ËÁã룬Îȶ¨Ê±·¢ÏֶַȱêÅÆÈçͼ¼×Ëùʾ£¬Ö¸ÕëÆ«×ó£¬ËµÃ÷×ó¶ËÆ«ÖØ£¬ÒªÊ¹ºáÁºË®Æ½Æ½ºâ£¬Ó¦½«ÓÒ²àµÄƽºâÂÝĸÍùÓÒµ÷¡£¡°×óÆ«ÓÒµ÷¡±¡£
£¨3£©¢ÚÓÃϸÉþ½«¹ÒÊÎ˨ºÃ²¢½þûÔÚË®ÖУ¬µ±Ììƽƽºâºó£¬ÓÒÅÌÖÐíÀÂë150g,ÓÎÂë2.4g£¬´ËʱÌìƽµÄ¶ÁÊýΪ152.4g£¬Ôò¹ÒÊÎÊܵ½µÄË®µÄ¸¡Á¦ÊÇF¸¡=(152.4g-150g) ¡Á10-3¡Á10N/kg=2.4¡Á10-2N£¬¸ù¾Ý°¢»ùÃ×µÂÔÀí¹ÒÊεÄÌå»ýV=F¸¡/¦Ñg=2.4¡Á10-2N/1.0¡Á103kg/m3¡Á10N/kg=2.4¡Á10-6m3=2.4cm3¡£
£¨4£©½ðÊô¹ÒÊεÄÖÊÁ¿m=21.6g£¬Ìå»ýV=2.4 cm3¡£ÃܶȦÑ=m/v=21.6g/2.4 cm3=9g/cm3£»Í¨¹ý²éÃܶȱí¶ÔÕÕ¿ÉÖª¸Ã½ðÊô¹ÒÊοÉÄÜÊÇÍÊÎÆ·¡£
![](http://thumb2018.1010pic.com/images/loading.gif)