ÌâÄ¿ÄÚÈÝ
![](http://thumb.1010pic.com/pic3/upload/images/201308/75/4834fe59.png)
£¨1£©Ê¹ÓÃÌìƽʱ£¬Ê×ÏÈ°ÑÌìƽ·ÅÔÚ
ˮƽ
ˮƽ
×ÀÃæÉÏ£¬°ÑÓÎÂëÒƵ½ºâÁ¿±ê³ß×ó¶ËµÄ¡°0¡±¿Ì¶ÈÏß´¦£¬Ëû·¢ÏÖÓÒ
ÓÒ
£¨Ñ¡Ìî¡°×ó¡±»ò¡°ÓÒ¡±£©Å̵ÄλÖýϸߣ¬±ãÏòÓÒµ÷½ÚºáÁºÉϵÄƽºâÂÝĸ£¬Ê¹Ö¸Õë¶Ô×¼ÁË·Ö¶ÈÅÌÖÐÑë¿Ì¶ÈÏߣ®£¨2£©Ð¡Ã÷×¼±¸ÏÈÓÃÌìƽ²âÁ¿20öӲ±ÒµÄÖÊÁ¿£¬È»ºó¼ÆËã³öµ¥¸öÓ²±ÒµÄÖÊÁ¿£¬ÕâÑù×öµÄÄ¿µÄÊÇ
²â¶àËãÉÙ£¬¼õСʵÑéÎó²î
²â¶àËãÉÙ£¬¼õСʵÑéÎó²î
£®£¨3£©Í¼£¨¼×£©Êǽ«20öӲ±Ò·ÅÈëÁ¿Í²Ç°ºóµÄÒºÃæÇé¿ö£¬Ôò20öӲ±ÒµÄÌå»ýΪ
10
10
ml£¬ÔÙ½«Ó²±Ò´ÓÁ¿Í²ÖÐÈ¡³ö²âÆäÖÊÁ¿£¬µ±ÌìƽƽºâʱÓÒÅÌËù¼ÓíÀÂë¼°ÓÎÂëµÄλÖÃÈçͼ£¨ÒÒ£©Ëùʾ£¬Ôò20öӲ±ÒµÄÖÊÁ¿Îª78
78
g£¬Ëù²âÓ²±Ò²ÄÁϵÄÃܶÈΪ7.8¡Á103
7.8¡Á103
kg/m3£®¸Ã·½·¨Ëù²âµÄÃܶÈÖµ¦Ñ²âÓëÕæʵֵ¦ÑÕæÏà±ÈÊǦѲ⣾
£¾
¦ÑÕ棨ѡÌî¡°£¼¡±»ò¡°£¾¡±£©£®£¨4£©Èô¸ÃÓ²±ÒÄ¥Ëðºó£¬ËüµÄÃܶȽ«
²»±ä
²»±ä
£¨Ìî¡°±ä´ó¡±¡¢¡°±äС¡±»ò¡°²»±ä¡±£©£®·ÖÎö£º£¨1£©ÌìƽʹÓÃÇ°µÄµ÷½Ú£º¢Ù·Å£º°ÑÌìƽ·Åµ½Ë®Æ½×ÀÃæÉÏ£»¢ÚÒÆ£»°ÑÓÎÂëÒƵ½±ê³ß×ó¶ËÁã¿ÌÏß´¦£»¢Ûµ÷£ºµ÷½ÚƽºâÂÝĸ£¬Ê¹Ö¸ÕëÖ¸ÔÚ·Ö¶ÈÅ̵ÄÖÐÏß´¦£®
£¨2£©²â¶àËãÉÙ£¬¿ÉÒÔ¼õС²âÁ¿Îó²î£»
£¨3£©×óÅÌÖÐÎïÌåµÄÖÊÁ¿µÈÓÚíÀÂëµÄÖÊÁ¿¼ÓÉÏÓÎÂëµÄʾÊý£»½«Ó²±Ò·ÅÈëË®ÖÐÇ°ºóÁ¿Í²¶ÁÊýÖ®²î¾ÍÊÇ20öӲ±ÒµÄÌå»ý£»Ó²±ÒµÄÃܶȿÉÒÔÓæÑ=
Çó³ö£»·ÖÎöÖÊÁ¿ºÍÌå»ýµÄ²âÁ¿£¬È·¶¨²âÁ¿ÖµÓëÕæʵֵ֮¼äµÄ¹Øϵ£®
£¨4£©ÃܶÈÊÇÎïÖʵÄÒ»ÖÖÌØÐÔ£¬ÓëÎïÌåµÄÖÊÁ¿ºÍÌå»ýÎ޹أ®
£¨2£©²â¶àËãÉÙ£¬¿ÉÒÔ¼õС²âÁ¿Îó²î£»
£¨3£©×óÅÌÖÐÎïÌåµÄÖÊÁ¿µÈÓÚíÀÂëµÄÖÊÁ¿¼ÓÉÏÓÎÂëµÄʾÊý£»½«Ó²±Ò·ÅÈëË®ÖÐÇ°ºóÁ¿Í²¶ÁÊýÖ®²î¾ÍÊÇ20öӲ±ÒµÄÌå»ý£»Ó²±ÒµÄÃܶȿÉÒÔÓæÑ=
m |
V |
£¨4£©ÃܶÈÊÇÎïÖʵÄÒ»ÖÖÌØÐÔ£¬ÓëÎïÌåµÄÖÊÁ¿ºÍÌå»ýÎ޹أ®
½â´ð£º½â£º
£¨1£©ÌìƽҪ·ÅÔÚˮƽ×ÀÃæÉÏ£¬ÏȽ«ÓÎÂëÒƵ½±ê³ß×ó¶ËÁã¿ÌÏß´¦£»ÈôÓÒÅ̵ÄλÖýϸߣ¬Ö¸Õ뽫ָÔÚ·Ö¶ÈÅ̵ÄÖÐÑëµÄ×ó²à£¬Ó¦ÏòÓÒµ÷½ÚºáÁºÉϵÄƽºâÂÝĸ£¬Ê¹Ö¸ÕëÖ¸ÔÚ·Ö¶ÈÅÌÖÐÑë¿Ì¶ÈÏߣ®
£¨2£©ÏÈÀûÓÃÌìƽ³Æ³ö¶à¸öÓ²±ÒµÄ×ÜÖÊÁ¿£¬È»ºó¼ÆËã³öµ¥¸öÓ²±ÒµÄÖÊÁ¿£¬ÕâÑù×öµÄÄ¿µÄÊÇ£º²â¶àËãÉÙ£¬¼õСʵÑéÎó²î£»
£¨3£©20öӲ±ÒµÄÖÊÁ¿Îª50g+20g+5g+3g=78g£¬
20öӲ±ÒµÄÌå»ýΪ40ml-30ml=10ml=10cm3£»
Ó²±ÒµÄÃܶȣº
¦Ñ=
=
=7.8g/cm3=7.8¡Á103kg/m3£»
ÏÈÀûÓÃÅÅË®·¨²âÁ¿ÁËÓ²±ÒµÄÖÊÁ¿£¬½Ó×ŲâÁ¿Ó²±ÒµÄÖÊÁ¿£¬ÒòΪӲ±ÒÉÏÕ´ÓÐˮʹµÃ²âµÃµÄÖÊÁ¿Æ«´ó£¬Ê¹µÃÃܶȵIJâÁ¿Öµ´óÓÚÕæʵֵ£¬¼´£ºÊǦѲ⣾¦ÑÕ棻
£¨4£©ÃܶÈÊÇÎïÖʵÄÒ»ÖÖÌØÐÔ£¬Ó²±ÒÄ¥Ëðºó£¬ÖÊÁ¿ºÍÌå»ý¼õС£¬²ÄÁϲ»±ä£¬ÃܶÈÊDz»±äµÄ£®
¹Ê´ð°¸Îª£º£¨1£©Ë®Æ½£»ÓÒ£»£¨2£©²â¶àËãÉÙ£¬¼õСʵÑéÎó²î£»£¨3£©10£»78£»7.8¡Á103£»£¾£»²»±ä£®
£¨1£©ÌìƽҪ·ÅÔÚˮƽ×ÀÃæÉÏ£¬ÏȽ«ÓÎÂëÒƵ½±ê³ß×ó¶ËÁã¿ÌÏß´¦£»ÈôÓÒÅ̵ÄλÖýϸߣ¬Ö¸Õ뽫ָÔÚ·Ö¶ÈÅ̵ÄÖÐÑëµÄ×ó²à£¬Ó¦ÏòÓÒµ÷½ÚºáÁºÉϵÄƽºâÂÝĸ£¬Ê¹Ö¸ÕëÖ¸ÔÚ·Ö¶ÈÅÌÖÐÑë¿Ì¶ÈÏߣ®
£¨2£©ÏÈÀûÓÃÌìƽ³Æ³ö¶à¸öÓ²±ÒµÄ×ÜÖÊÁ¿£¬È»ºó¼ÆËã³öµ¥¸öÓ²±ÒµÄÖÊÁ¿£¬ÕâÑù×öµÄÄ¿µÄÊÇ£º²â¶àËãÉÙ£¬¼õСʵÑéÎó²î£»
£¨3£©20öӲ±ÒµÄÖÊÁ¿Îª50g+20g+5g+3g=78g£¬
20öӲ±ÒµÄÌå»ýΪ40ml-30ml=10ml=10cm3£»
Ó²±ÒµÄÃܶȣº
¦Ñ=
m |
V |
78g |
10cm3 |
ÏÈÀûÓÃÅÅË®·¨²âÁ¿ÁËÓ²±ÒµÄÖÊÁ¿£¬½Ó×ŲâÁ¿Ó²±ÒµÄÖÊÁ¿£¬ÒòΪӲ±ÒÉÏÕ´ÓÐˮʹµÃ²âµÃµÄÖÊÁ¿Æ«´ó£¬Ê¹µÃÃܶȵIJâÁ¿Öµ´óÓÚÕæʵֵ£¬¼´£ºÊǦѲ⣾¦ÑÕ棻
£¨4£©ÃܶÈÊÇÎïÖʵÄÒ»ÖÖÌØÐÔ£¬Ó²±ÒÄ¥Ëðºó£¬ÖÊÁ¿ºÍÌå»ý¼õС£¬²ÄÁϲ»±ä£¬ÃܶÈÊDz»±äµÄ£®
¹Ê´ð°¸Îª£º£¨1£©Ë®Æ½£»ÓÒ£»£¨2£©²â¶àËãÉÙ£¬¼õСʵÑéÎó²î£»£¨3£©10£»78£»7.8¡Á103£»£¾£»²»±ä£®
µãÆÀ£º±¾Ì⿼²éÁËÌìƽµÄʹÓá¢ÊµÑéÎó²îµÄ·ÖÎö¡¢ÃܶȵIJâÁ¿¡¢ÃܶȵÄÌØÐÔ£¬Ëä֪ʶµã¶à£¬µ«ÊôÓÚ»ù±¾ÊµÑéÄÜÁ¦µÄ²âÊÔ£¬ÓÐÒâÒ壡
![](http://thumb2018.1010pic.com/images/loading.gif)
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿
ÃܶÈÊÇÎïÖʵÄÒ»ÖÖÌØÐÔ£¬ÀûÓÃÃܶȿÉÒÔ¼ø±ðÎïÖÊ£®Ð¡Ã÷ÏëÁ˽â2005Äê°æ1½ÇÓ²±ÒÊÇÓÉʲô²ÄÁÏÖƳɵģ¬±ã½øÐÐÁËÈçϲâÁ¿Ó²±ÒµÄÃܶȵÄʵÑ飺ËûÓõ÷ÕûºÃµÄÌìƽ²âÁ¿ÁË20ö1½ÇÓ²±ÒµÄÖÊÁ¿£»ÓÃÁ¿Í²²âÁ¿ÁËÕâ20öӲ±ÒµÄÌå»ý£®Çë¸ù¾ÝͼÖÐËùʾ²âÁ¿Çé¿ö°ïÖúËûÍê³ÉÊý¾Ý±í¸ñµÄÌîд£®
20ö1½ÇÓ²±ÒµÄÖÊÁ¿/g | |
Ë®µÄÌå»ý/cm3 | |
20ö1½ÇÓ²±ÒºÍË®µÄ×ÜÌå»ý/cm3 | |
20ö1½ÇÓ²±ÒµÄÌå»ý/cm3 | |
1½ÇÓ²±ÒµÄÃܶÈ/g?cm-3 |
![¾«Ó¢¼Ò½ÌÍø](http://thumb.1010pic.com/pic3/upload/images/201107/67/84da21c3.png)