ÌâÄ¿ÄÚÈÝ
2010Äê4ÔÂ20ÈÕÒ¹¼ä£¬Î»ÓÚÄ«Î÷¸çµÄ×꾮ƽ̨°²Éú±¬Õ¨£¬Ôì³ÉÔÓÍ´óÁ¿Ð¹Â©£¬ÔØÖÁ5ÔÂ27ÈÕÒÑ©³öµÄÔÓÍÔ¼7¡Á107L£¬¸ø¸ÃµØÇøÔì³É¾Þ´óµÄÉú̬ÔÖÄѺ;¼ÃËðʧ£¬ÒÑÖªÔÓ͵ÄÃܶÈΪ0.9¡Á103Kg/m3£¬ÈÈֵΪ4.4¡Á107J/Kg£¬Ë®µÄ±ÈÈÈÈÝΪ4.2¡Á103J/£¨kg?¡æ£©£®
Ç󣺣¨1£©¼ÙÉèÕâЩй©µÄÔÓÍÍêȫȼÉÕ£¬·Å³öµÄÈÈÁ¿Ô¼Îª¶àÉÙ£¿
£¨2£©¼ÙÉè·Å³öµÄÕâЩÈÈÁ¿È«²¿±»Ë®ÎüÊÕ£¬¿ÉÒÔʹ¶àÉÙÖÊÁ¿µÄË®´Ó10¡æÉý¸ßµ½100¡æ£¿
½â£º£¨1£©Ð¹Â©ÔÓ͵ÄÌå»ý£º
v=7¡Á107L=7¡Á107¡Á10-3m3=7¡Á104m3
й©ÔÓ͵ÄÖÊÁ¿£º
m=¦Ñv=0.9¡Á103kg/m3¡Á7¡Á104m3=6.3¡Á107kg£»
ÕâЩÔÓÍÍêȫȼÉշųöÀ´µÄÈÈÁ¿£º
Q·Å=mq=6.3¡Á107kg¡Á4.4¡Á107J/kg=2.772¡Á1015J£®
£¨2£©ÓÉÌâÖª£¬Ë®ÎüÊÕµÄÈÈÁ¿£º
QÎü=Q·Å=2.772¡Á1015J£»
¡ßQÎü=cË®mË®¡÷t
¡àm==¡Ö7.3¡Á109kg£®
´ð£º£¨1£©¼ÙÉèÕâЩй©µÄÔÓÍÍêȫȼÉÕ£¬·Å³öµÄÈÈÁ¿Ô¼Îª2.772¡Á1015J£»
£¨2£©¼ÙÉè·Å³öµÄÕâЩÈÈÁ¿È«²¿±»Ë®ÎüÊÕ£¬¿ÉÒÔʹ7.3¡Á109kgÖÊÁ¿µÄË®´Ó10¡æÉý¸ßµ½100¡æ£®
·ÖÎö£º£¨1£©ÖªµÀ©³öµÄÔÓ͵ÄÌå»ý£¬ÀûÓÃÃܶȹ«Ê½Çóй©ÔÓ͵ÄÖÊÁ¿£»ÓÖÖªµÀÔÓ͵ÄÈÈÖµ£¬ÔÙÀûÓÃQ·Å=mqÇóÔÓÍÍêȫȼÉշųöµÄÈÈÁ¿£»
£¨2£©ÓÉÌâÖªÔÓÍÍêȫȼÉշųöµÄÈÈÁ¿È«²¿±»Ë®ÎüÊÕ£¬ÓÖÖªµÀË®µÄ±ÈÈÈÈÝ¡¢Ë®µÄ³õκÍĩΣ¬ÀûÓÃÎüÈȹ«Ê½QÎü=cm¡÷tÇóË®µÄÖÊÁ¿£®
µãÆÀ£º±¾Ì⿼²éÁËѧÉú¶ÔÃܶȹ«Ê½¡¢ÎüÈȹ«Ê½QÎü=cm¡÷t¡¢È¼ÁÏÍêȫȼÉշųöµÄÈÈÁ¿¹«Ê½Q·Å=mqµÄÕÆÎÕºÍÔËÓã¬×¢Òâ¿Æѧ¼ÇÊý·¨µÄʹÓã¨Ö¸ÊýÔËË㣩£®
v=7¡Á107L=7¡Á107¡Á10-3m3=7¡Á104m3
й©ÔÓ͵ÄÖÊÁ¿£º
m=¦Ñv=0.9¡Á103kg/m3¡Á7¡Á104m3=6.3¡Á107kg£»
ÕâЩÔÓÍÍêȫȼÉշųöÀ´µÄÈÈÁ¿£º
Q·Å=mq=6.3¡Á107kg¡Á4.4¡Á107J/kg=2.772¡Á1015J£®
£¨2£©ÓÉÌâÖª£¬Ë®ÎüÊÕµÄÈÈÁ¿£º
QÎü=Q·Å=2.772¡Á1015J£»
¡ßQÎü=cË®mË®¡÷t
¡àm==¡Ö7.3¡Á109kg£®
´ð£º£¨1£©¼ÙÉèÕâЩй©µÄÔÓÍÍêȫȼÉÕ£¬·Å³öµÄÈÈÁ¿Ô¼Îª2.772¡Á1015J£»
£¨2£©¼ÙÉè·Å³öµÄÕâЩÈÈÁ¿È«²¿±»Ë®ÎüÊÕ£¬¿ÉÒÔʹ7.3¡Á109kgÖÊÁ¿µÄË®´Ó10¡æÉý¸ßµ½100¡æ£®
·ÖÎö£º£¨1£©ÖªµÀ©³öµÄÔÓ͵ÄÌå»ý£¬ÀûÓÃÃܶȹ«Ê½Çóй©ÔÓ͵ÄÖÊÁ¿£»ÓÖÖªµÀÔÓ͵ÄÈÈÖµ£¬ÔÙÀûÓÃQ·Å=mqÇóÔÓÍÍêȫȼÉշųöµÄÈÈÁ¿£»
£¨2£©ÓÉÌâÖªÔÓÍÍêȫȼÉշųöµÄÈÈÁ¿È«²¿±»Ë®ÎüÊÕ£¬ÓÖÖªµÀË®µÄ±ÈÈÈÈÝ¡¢Ë®µÄ³õκÍĩΣ¬ÀûÓÃÎüÈȹ«Ê½QÎü=cm¡÷tÇóË®µÄÖÊÁ¿£®
µãÆÀ£º±¾Ì⿼²éÁËѧÉú¶ÔÃܶȹ«Ê½¡¢ÎüÈȹ«Ê½QÎü=cm¡÷t¡¢È¼ÁÏÍêȫȼÉշųöµÄÈÈÁ¿¹«Ê½Q·Å=mqµÄÕÆÎÕºÍÔËÓã¬×¢Òâ¿Æѧ¼ÇÊý·¨µÄʹÓã¨Ö¸ÊýÔËË㣩£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿