ÌâÄ¿ÄÚÈÝ
Éç»á·¢Õ¹µ½½ñÌ죬ÄÜԴΣ»ú¿ªÊ¼À§ÈÅÈËÀ࣮ÈËÃÇÕýÔÚÑ°ÕÒ¸÷ÖÖ¿ÉÄܵÄδÀ´ÄÜÔ´£¬ÒÔά³ÖÈË·àÉç»áµÄ³ÖÐø£º·¢Õ¹£®ÀûÓÃÇâµÄͬλËØ뮡¢ë°ÔÚ¿É¿ØÇé¿öÏ·¢ÉúºË¾Û±ä¶ø²úÉúµÄºËÄÜÔòÊÇÈËÀàÑо¿¿ª·¢µÄÐÂÄÜÔ´£®
ijһÈȺ˾۱äʵÑé·´Ó¦¶Ñ£¬¿ÉÒÔÔÚ15minÄÚ²úÉú1.26¡Á1012JµÄÈÈÁ¿£®¾Ý±¨µÀ£º1Lº£Ë®ÌáÈ¡µÄÇâµÄͬλËØ£¬ÔÚÍêÈ«¾Û±ä·´Ó¦ÖÐÊͷŵÄÄÜÁ¿£¬Ï൱ÓÚ300LÆûÓÍÍêȫȼÉÕËùÊͷŵÄÈÈÁ¿£®ÒÑÖªÆûÓ͵ÄÃܶÈԼΪ0.7¡Á103kg/m3£¬ÆûÓ͵ÄÈÈֵԼΪ5¡Á107J/kg£¬Çë¸ù¾ÝËùÌṩµÄÊý¾Ý½øÐÐÒÔϹÀË㣺£¨1L=1¡Á10-3m3£©
£¨1£©300LÆûÓÍÍêȫȼÉÕ¿ÉÒԷųö¶àÉÙÈÈÁ¿£¿
£¨2£©ÈôÔÚ·¢Éú¾Û±äʱ²úÉú1.26¡Á1012JµÄÈÈÁ¿£¬ÔòÐèÒª¶àÉÙÉýº£Ë®À´ÌáÈ¡ÇâµÄͬλËØ£¿
ijһÈȺ˾۱äʵÑé·´Ó¦¶Ñ£¬¿ÉÒÔÔÚ15minÄÚ²úÉú1.26¡Á1012JµÄÈÈÁ¿£®¾Ý±¨µÀ£º1Lº£Ë®ÌáÈ¡µÄÇâµÄͬλËØ£¬ÔÚÍêÈ«¾Û±ä·´Ó¦ÖÐÊͷŵÄÄÜÁ¿£¬Ï൱ÓÚ300LÆûÓÍÍêȫȼÉÕËùÊͷŵÄÈÈÁ¿£®ÒÑÖªÆûÓ͵ÄÃܶÈԼΪ0.7¡Á103kg/m3£¬ÆûÓ͵ÄÈÈֵԼΪ5¡Á107J/kg£¬Çë¸ù¾ÝËùÌṩµÄÊý¾Ý½øÐÐÒÔϹÀË㣺£¨1L=1¡Á10-3m3£©
£¨1£©300LÆûÓÍÍêȫȼÉÕ¿ÉÒԷųö¶àÉÙÈÈÁ¿£¿
£¨2£©ÈôÔÚ·¢Éú¾Û±äʱ²úÉú1.26¡Á1012JµÄÈÈÁ¿£¬ÔòÐèÒª¶àÉÙÉýº£Ë®À´ÌáÈ¡ÇâµÄͬλËØ£¿
·ÖÎö£º£¨1£©ÒÑÖªÆûÓ͵ÄÌå»ýºÍÃܶȣ¬ÀûÓÃm=¦ÑV¼´¿ÉÇó³öÖÊÁ¿£»ÔÙÀûÓÃQ=mqÇó³öÍêȫȼÉշųöµÄÈÈÁ¿£»
£¨2£©ÓÉÌâÖª£¬1Lº£Ë®ÌáÈ¡µÄÇâµÄͬλËØ£¬ÔÚÍêÈ«¾Û±ä·´Ó¦ÖÐÊͷŵÄÄÜÁ¿£¬Ï൱ÓÚ300LÆûÓÍÍêȫȼÉÕËùÊͷŵÄÈÈÁ¿£»ÖªµÀÐèÒªµÄ×ÜÈÈÁ¿£¬¿ÉÇóÐèÒªº£Ë®µÄÌå»ý£®
£¨2£©ÓÉÌâÖª£¬1Lº£Ë®ÌáÈ¡µÄÇâµÄͬλËØ£¬ÔÚÍêÈ«¾Û±ä·´Ó¦ÖÐÊͷŵÄÄÜÁ¿£¬Ï൱ÓÚ300LÆûÓÍÍêȫȼÉÕËùÊͷŵÄÈÈÁ¿£»ÖªµÀÐèÒªµÄ×ÜÈÈÁ¿£¬¿ÉÇóÐèÒªº£Ë®µÄÌå»ý£®
½â´ð£º½â£º£¨1£©ÆûÓ͵ÄÖÊÁ¿£º
m=¦ÑV=0.7¡Á103kg/m3¡Á0.3m3=210kg£¬
ÆûÓÍÍêȫȼÉշųöµÄÈÈÁ¿£º
Q·Å=mq=210kg¡Á5¡Á107J/kg=1.05¡Á1010J£»
£¨2£©¡ß1Lº£Ë®ÌáÈ¡µÄÇâµÄͬλËØ£¬ÔÚÍêÈ«¾Û±ä·´Ó¦ÖÐÊͷŵÄÄÜÁ¿£¬Ï൱ÓÚ300LÆûÓÍÍêȫȼÉÕËùÊͷŵÄÈÈÁ¿£¨1.05¡Á1010J£©£¬
¡àÐèÒªº£Ë®µÄÌå»ý£º
Vº£Ë®=
=120L£®
´ð£º£¨1£©300LÆûÓÍÍêȫȼÉÕ¿ÉÒԷųö1.05¡Á1010JµÄÈÈÁ¿£»
£¨2£©ÈôÔÚ·¢Éú¾Û±äʱ²úÉú1.26¡Á1012JµÄÈÈÁ¿£¬ÔòÐèÒª120Éýº£Ë®À´ÌáÈ¡ÇâµÄͬλËØ£®
m=¦ÑV=0.7¡Á103kg/m3¡Á0.3m3=210kg£¬
ÆûÓÍÍêȫȼÉշųöµÄÈÈÁ¿£º
Q·Å=mq=210kg¡Á5¡Á107J/kg=1.05¡Á1010J£»
£¨2£©¡ß1Lº£Ë®ÌáÈ¡µÄÇâµÄͬλËØ£¬ÔÚÍêÈ«¾Û±ä·´Ó¦ÖÐÊͷŵÄÄÜÁ¿£¬Ï൱ÓÚ300LÆûÓÍÍêȫȼÉÕËùÊͷŵÄÈÈÁ¿£¨1.05¡Á1010J£©£¬
¡àÐèÒªº£Ë®µÄÌå»ý£º
Vº£Ë®=
1.26¡Á1012J |
1.05¡Á1010J/L |
´ð£º£¨1£©300LÆûÓÍÍêȫȼÉÕ¿ÉÒԷųö1.05¡Á1010JµÄÈÈÁ¿£»
£¨2£©ÈôÔÚ·¢Éú¾Û±äʱ²úÉú1.26¡Á1012JµÄÈÈÁ¿£¬ÔòÐèÒª120Éýº£Ë®À´ÌáÈ¡ÇâµÄͬλËØ£®
µãÆÀ£º±¾Ì⿼²éÁËѧÉú¶ÔÃܶȹ«Ê½¡¢È¼ÁÏÍêÈ«·ÅÈȹ«Ê½µÄÕÆÎÕºÍÔËÓã¬ÀûÓÃËùѧ֪ʶ½â¾öʵ¼ÊÎÊÌ⣬ÓÐÒâÒ壬עÒâ300L¡Ù300kg£¬±ØÐëÀûÓÃÃܶȹ«Ê½Çó½â£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿