Question

12£®Ì«ÑôÄÜÈÈË®Æ÷ÊÇÖ±½ÓÀûÓÃÌ«ÑôÄܸøË®¼ÓÈȵÄ×°Öã¬Èç±íÊÇСÃ÷¼ÒµÄÌ«ÑôÄÜÈÈË®Æ÷ijÌìÔÚÑô¹âÕÕÉäϵÄÏà¹ØÐÅÏ¢

Ì«ÑôÕÕÉäʱ¼ä/h	×°Ë®Á¿/Kg	ÎüÈÈ°åÃæ»ý/m2	Ë®Éý¸ßµÄζÈ/¡æ	Ë®µÄ±ÈÈÈÈÝ/J£¨kg£®¡æ£©-1	Ì«Ñô·øÉ书ÂÊ/J£®£¨m2-h£©-1
10	100	2.5	50	4.2¡Á103	1.68¡Á106

ÆäÖÐÌ«Ñô·øÉ书ÂÊÊÇÖ¸1hÄÚͶÉäµ½1m²Ãæ»ýÉϵÄÌ«ÑôÄÜ£®
Ç󣺣¨1£©Ë®ÔÚ10hÄÚÎüÊÕµÄÈÈÁ¿£»
£¨2£©Èç¹ûË®ÎüÊÕµÄÈÈÁ¿ÓÃÌìÈ»ÆøÀ´Ìṩ£¬ÐèÒªÍêȫȼÉÕ¶àÉÙm³µÄÌìÈ»Æø£»£¨ÌìÈ»ÆøµÄÈÈֵΪ8.4¡Á10⁷J/m³£¬ÌìÈ»ÆøÍêȫȼÉշųöµÄÈÈÁ¿80%¸øË®ÎüÊÕ£©

Answer 1

·ÖÎö £¨1£©ÓɱíÖÐÊý¾ÝÖªµÀË®µÄÖÊÁ¿¡¢Ë®µÄ±ÈÈÈÈÝ¡¢Ë®µÄζÈÉý¸ßÖµ£¬ÀûÓÃÎüÈȹ«Ê½Q_Îü=cm¡÷tÇóË®ÎüÊÕµÄÈÈÁ¿£¨ÓÐÓÃÄÜÁ¿£©£»
£¨2£©Èç¹ûË®ÎüÊÕµÄÈÈÁ¿ÓÃÌìÈ»ÆøÀ´Ìṩ£¬ÓÉЧÂʹ«Ê½Çó³öÌìÈ»ÆøÐè·Å³öµÄÈÈÁ¿Q_·Å£¬ÔÙÀûÓÃQ_·Å=VqÇóÐèÒªÍêȫȼÉÕ¶àÉÙÌìÈ»Æø£®

½â´ð ½â£º£¨1£©Ë®ÔÚ10hÄÚÎüÊÕµÄÈÈÁ¿£ºQ_Îü=cm¡÷t=4.2¡Á10³J/£¨kg•¡æ£©¡Á100kg¡Á50¡æ=2.1¡Á10⁷J£»
£¨2£©ÓɦÇ=$\frac{{Q}_{Îü}}{{Q}_{·Å}}$µÃ£¬ÌìÈ»ÆøÍêȫȼÉÕÐè·Å³öÈÈÁ¿£ºQ_·Å=$\frac{{Q}_{Îü}}{¦Ç}$=$\frac{2.1¡Á1{0}^{7}J}{80%}$=2.625¡Á10⁷J£»
ÓÉQ_·Å=vqµÃ£¬
ÐèÒªÌìÈ»ÆøµÄÌå»ý£ºV=$\frac{{Q}_{·Å}}{q}$=$\frac{2.625¡Á1{0}^{7}J}{8.4¡Á1{0}^{7}J/{m}^{3}}$=0.3125m³£®
´ð£º£¨1£©Ë®ÔÚ10hÄÚÎüÊÕµÄÈÈÁ¿Îª2.1¡Á10⁷J£»
£¨2£©Èç¹ûË®ÎüÊÕµÄÈÈÁ¿ÓÃÌìÈ»ÆøÀ´Ìṩ£¬ÐèÒªÍêȫȼÉÕ0.3125m³µÄÌìÈ»Æø£®

µãÆÀ ±¾Ì⿼²éÁËѧÉú¶ÔÎüÈȹ«Ê½¡¢È¼ÁÏÍêȫȼÉÕ·ÅÈȹ«Ê½¡¢Ð§Âʹ«Ê½µÄÕÆÎÕºÍÔËÓ㬱¾Ìâ¹Ø¼ü£ºÒ»ÊÇÄÜ´ÓÌâÄ¿ÌṩµÄ±í¸ñÖеõ½Ïà¹ØÐÅÏ¢£¬¶þÊÇ×¢ÒâÈÈÖµµ¥Î»£º¹ÌÌå¡¢ÒºÌåȼÁÏ£¨J/kg£©ºÍÆøÌåȼÁÏJ/m³µÄÇø±ð£®