ÌâÄ¿ÄÚÈÝ
¡¾ÌâÄ¿¡¿Ð¡Ã÷ÀûÓÃÍÐÅÌÌìƽ¡¢¾í³ß£¬²âÁ¿Ò»¾í´Öϸ¾ùÔȵĽðÊôÏßµÄÃܶȡ£ÒÑÖª½ðÊôÏߵĺá½ØÃæ»ýS£½5¡Á10-3 cm2¡£Çë°ïÖúСÃ÷Íê³ÉʵÑé²½Öè²¢»Ø´ðÎÊÌ⣺
¼¸ÖÖ³£¼û½ðÊôµÄÃÜ¶È | |
²Ä ÁÏ | ÃܶȦÑ/kg¡¤m-3 |
Ǧ | 11.3¡Á103 |
Í | 8.9¡Á103 |
¸Ö¡¢Ìú | 7.9¡Á103 |
ÂÁ | 2.7¡Á103 |
¢Ù °ÑÌìƽ·ÅÔÚˮƽ×ÀÃæÉÏ£¬ÓÎÂë¹éÁãºó£¬·¢ÏÖÖ¸Õ뾲ֹʱµÄλÖÃÈçͼ¼×Ëùʾ£¬Îªµ÷½ÚÌìƽºáÁºÆ½ºâ£¬Ó¦½«Æ½ºâÂÝĸÏò______¶Ëµ÷½Ú£»£¨Ñ¡Ìî¡°×ó¡±»ò¡°ÓÒ¡±£©
¢Ú Óõ÷ºÃµÄÌìƽ²â½ðÊôÏßÖÊÁ¿£¬ÌìƽÖØÐÂƽºâʱ£¬ÌìƽËù·ÅíÀÂë¼°ÓÎÂëÔÚ±ê³ßÉϵÄλÖÃÈçͼÒÒËùʾ£¬Ôò¸Ã½ðÊôÏßµÄÖÊÁ¿mΪ______g£»
¢Û Óþí³ß²â³öÕâ¾í½ðÊôÏߵij¤¶ÈlΪ4m£»
¢Ü ÓæÑ=¼ÆËã³öÕâ¾í½ðÊôÏßµÄÃܶȣ»
Çë»Ø´ðÈçÏÂÎÊÌ⣺
(1)»³ö±¾´ÎʵÑéµÄÊý¾Ý¼Ç¼±í£»
£¨________£©
(2)²é±í¿ÉÖª´Ë½ðÊôÏß¿ÉÄÜÊÇ_________¡£
¡¾´ð°¸¡¿×ó 17.8
m/kg | l/m | ¦Ñ/kg¡¤m-3 |
Í
¡¾½âÎö¡¿
¢Ù[1]¸ù¾ÝÌìƽµÄµ÷½ÚºÍʹÓ÷½·¨£¬ÈçͼËùʾ£¬Ö¸ÕëÓÒÆ«£¬Ó¦Ïò×óµ÷½ÚƽºâÂÝĸ¡£
¢Ú[2]ÈçͼËùʾ£¬ÌìƽµÄ·Ö¶ÈÖµÊÇ0.2g£¬¼´
m½ðÊô =10g+5g+2.8g=17.8g
¸Ã½ðÊôÏßµÄÖÊÁ¿mΪ17.8g¡£
(1)[3] ±¾´ÎʵÑé¼Ç¼µÄÊý¾ÝÓнðÊôÏßµÄÖÊÁ¿¡¢½ðÊôÏߵij¤¶È¼°½ðÊôÏßµÄÃܶȣ¬Òò´Ë¼Ç¼±íÈçÏ£º
m/kg | l/m | ¦Ñ/kg¡¤m-3 |
(2)[4] ½ðÊôÏßµÄÌå»ý
V=Sh=5¡Á10-3 cm2400cm=2cm3
½ðÊô¿éÃܶÈ
¦Ñ= ==8.9g/cm3
²é±íµÃÕâÖÖ½ðÊôÎïÖÊÓë͵ÄÃܶÈÏàͬ£¬¹Ê¿ÉÄÜÊÇÍ¡£
¡¾ÌâÄ¿¡¿ÈçͼËùʾÊÇij¿îµçÑøÉúºø¼°ÆäÃúÅƵIJ¿·Ö²ÎÊý£¬µ±ÑøÉúºøÕý³£¹¤×÷ʱ£¬Çó£º
¶î¶¨µçѹ | 220V |
ƵÂÊ | 50Hz |
¶î¶¨¹¦ÂÊ | 1100W |
ÈÝÁ¿ | 1L |
£¨1£©ÑøÉúºøÕý³£¹¤×÷µÄµç×è¡£
£¨2£©Èô¸ÃÑøÉúºøµÄ¼ÓÈÈЧÂÊΪ80%£¬ÔÚ±ê×¼´óÆøѹÏ£¬½«³õÎÂÊÇ12¡æµÄÒ»ºøË®ÉÕ¿ª£¬ÐèÒª¶à³¤Ê±¼ä£¿£¨cË®£½4.2¡Á103J/£¨kg¡æ£©£¬¦ÑË®£½1.0¡Á103kg/m3]
£¨3£©ÔÚÎïÀí×ÛºÏʵ¼ù»î¶¯ÖУ¬Ð¡Ã÷ºÍСÀöͬѧÀûÓÃËùѧϰµÄÎïÀí֪ʶ£¬ºÏ×÷²âÁ¿ÑøÉúºøµÄʵ¼Ê¹¦ÂÊ¡£µç±íÉϱê×Å¡°1200r/£¨kWh£©¡±£¬ËûÃǰѼÒÖеÄÆäËûÓõçÆ÷¶¼ÓëµçÔ´¶Ï¿ª£¬½öÈÃÑøÉúºø½ÓÈëµç·ÖÐÉÕË®£¬2minµçÄܱíµÄתÅÌתÁË40r£¬ÇóµçÑøÈÝÁ¿ÉúºøµÄʵ¼Ê¹¦ÂÊ¡£