ÌâÄ¿ÄÚÈÝ
ΪÑо¿²»Í¬ÎïÖʵÄÎüÈÈÄÜÁ¦£¬Ä³Í¬Ñ§ÓÃÁ½¸öÍêÈ«ÏàͬµÄ¾Æ¾«µÆ£¬·Ö±ð¸øÖÊÁ¿ºÍ³õζ¼ÏàͬµÄ¼×¡¢ÒÒÁ½ÖÖÒºÌåͬʱ¼ÓÈÈ£¬·Ö±ð¼Ç¼¼ÓÈÈʱ¼äºÍÉý¸ßµÄζȣ¬¸ù¾Ý¼Ç¼µÄÊý¾Ý×÷³öÁËÁ½ÖÖÒºÌåµÄζÈËæʱ¼ä±ä»¯µÄͼÏó£¬ÈçͼËùʾ£®£¨1£©¸ù¾ÝͼÏó£¬Ä³Í¬Ñ§ÈÏΪ£º¡°¼ÓÈÈÏàͬµÄʱ¼äʱ£¬¼×Éý¸ßµÄζȸßһЩ£¬Õâ˵Ã÷¼×ÎüÊÕµÄÈÈÁ¿¶àһЩ¡±£®ÕâλͬѧµÄÅжÏÊÇ·ñÕýÈ·£¿Çë˵Ã÷ÀíÓÉ£®
£¨2£©ÒªÊ¹¼×¡¢ÒÒÉý¸ßÏàͬµÄζȣ¬Ó¦¸ø
£¨3£©Èç¹ûÒÑÖª¼×µÄ±ÈÈÈÈÝÊÇ1.8¡Á103J/£¨kg?¡æ£©£¬ÔòÒҵıÈÈÈÈÝÊÇ
·ÖÎö£º£¨1£©¼ÓÈÈÏàͬµÄʱ¼ä£¬ÎüÊÕÈÈÁ¿µÄ¶àÉÙÊÇÓɾƾ«µÆ»ðÑæµÄ´óС¾ö¶¨µÄ£¬¾Æ¾«µÆÏàͬ£¬ÎüÊÕµÄÈÈÁ¿¾ÍÊÇÏàͬ£®
£¨2£©Éý¸ßÏàͬµÄζȣ¬ÎÒÃÇ¿ÉÒÔÔÚ×ÝÖáÉÏÈ¡Ò»ÏàͬµÄζȣ¬×öºáÖáµÄƽÐÐÏߣ¬¿´ËµÄ¼ÓÈÈʱ¼ä³¤£¬ËµÄ±ÈÈÈÈݾʹó£®
£¨3£©¸ù¾ÝQÎü=Cm£¨t-t0£©¿ÉÖªÔÚÖÊÁ¿ºÍÎüÊÕÈÈÁ¿Ïàͬʱ£¬±ÈÈÈÈݺÍζȵı仯ֵ³É·´±È£¬¾Ý´ËÇó³öÒҵıÈÈÈÈÝ£®
£¨2£©Éý¸ßÏàͬµÄζȣ¬ÎÒÃÇ¿ÉÒÔÔÚ×ÝÖáÉÏÈ¡Ò»ÏàͬµÄζȣ¬×öºáÖáµÄƽÐÐÏߣ¬¿´ËµÄ¼ÓÈÈʱ¼ä³¤£¬ËµÄ±ÈÈÈÈݾʹó£®
£¨3£©¸ù¾ÝQÎü=Cm£¨t-t0£©¿ÉÖªÔÚÖÊÁ¿ºÍÎüÊÕÈÈÁ¿Ïàͬʱ£¬±ÈÈÈÈݺÍζȵı仯ֵ³É·´±È£¬¾Ý´ËÇó³öÒҵıÈÈÈÈÝ£®
½â´ð£º½â£º£¨1£©²»ÕýÈ·£®Éý¸ßµÄζȴ󲻴ú±íÎüÊÕµÄÈÈÁ¿¶à£¬ÎüÊÕÈÈÁ¿µÄ¶àÉÙÊÇÒ»ÑùµÄ£¬ÒòΪÊÇÓÃÁ½¸öÍêÈ«ÏàͬµÄ¾Æ¾«µÆ¼ÓÈÈÏàͬµÄʱ¼ä£¬¾Æ¾«µÆ·Å³öµÄÈÈÁ¿ÊÇÏàµÈ£¬¼×ºÍÒÒÎüÊÕµÄÈÈÁ¿Ò²ÊÇÏàµÈµÄ£®
£¨2£©ÓÉͼ¿ÉÖª£¬¼×ºÍÒÒÉý¸ßÏàͬµÄζȣ¬È綼Éý¸ß30¡æ£¬Î¶ÈÉýµ½40¡æ£¬¼×ÐèÒªµÄʱ¼äÊÇ3min£¬ÒÒÐèÒªµÄʱ¼äÊÇ4min£¬ÒÒÐèÒª¸ü³¤µÄ¼ÓÈÈʱ¼ä£¬ÕâÒ²¾Í˵Ã÷ÁËÒÒµÄÎüÈÈÄÜÁ¦Ç¿Ò»Ð©£®
¹Ê´ð°¸Îª£ºÒÒ¡¢ÒÒ£®
£¨3£©¸ù¾ÝQÎü=Cm£¨t-t0£©¿ÉÖªÔÚÖÊÁ¿ºÍÎüÊÕÈÈÁ¿Ò»¶¨Ê±£¬Î¶ȵı仯ֵºÍ±ÈÈÈÈݳɷ´±È£®
ÎÒÃÇ¿ÉÒÔÈ¡ÏàͬµÄ¼ÓÈÈʱ¼ä4min£¬ÓÃÏàͬµÄ¾Æ¾«µÆ¼ÓÈÈ4min£¬¼×ºÍÒÒÎüÊÕµÄÈÈÁ¿¾ÍÊÇÏàͬµÄ£¬¼×µÄζȱ仯ֵΪ50¡æ-10¡æ=40¡æ£¬ÒÒµÄζȱ仯ֵΪ40¡æ-10¡æ=30¡æ£¬
ÒҵıÈÈÈÈÝCÒÒ=
¡Á1.8¡Á103J/(kg?¡æ)=2.4¡Á103J/(kg?¡æ)
¹Ê´ð°¸Îª£º2.4¡Á103£®
£¨2£©ÓÉͼ¿ÉÖª£¬¼×ºÍÒÒÉý¸ßÏàͬµÄζȣ¬È綼Éý¸ß30¡æ£¬Î¶ÈÉýµ½40¡æ£¬¼×ÐèÒªµÄʱ¼äÊÇ3min£¬ÒÒÐèÒªµÄʱ¼äÊÇ4min£¬ÒÒÐèÒª¸ü³¤µÄ¼ÓÈÈʱ¼ä£¬ÕâÒ²¾Í˵Ã÷ÁËÒÒµÄÎüÈÈÄÜÁ¦Ç¿Ò»Ð©£®
¹Ê´ð°¸Îª£ºÒÒ¡¢ÒÒ£®
£¨3£©¸ù¾ÝQÎü=Cm£¨t-t0£©¿ÉÖªÔÚÖÊÁ¿ºÍÎüÊÕÈÈÁ¿Ò»¶¨Ê±£¬Î¶ȵı仯ֵºÍ±ÈÈÈÈݳɷ´±È£®
ÎÒÃÇ¿ÉÒÔÈ¡ÏàͬµÄ¼ÓÈÈʱ¼ä4min£¬ÓÃÏàͬµÄ¾Æ¾«µÆ¼ÓÈÈ4min£¬¼×ºÍÒÒÎüÊÕµÄÈÈÁ¿¾ÍÊÇÏàͬµÄ£¬¼×µÄζȱ仯ֵΪ50¡æ-10¡æ=40¡æ£¬ÒÒµÄζȱ仯ֵΪ40¡æ-10¡æ=30¡æ£¬
ÒҵıÈÈÈÈÝCÒÒ=
40¡æ |
30¡æ |
¹Ê´ð°¸Îª£º2.4¡Á103£®
µãÆÀ£º´ËÌ⿼²éµÄÊÇÓйرÈÈÈÈݵÄ֪ʶ£¬±ÈÈÈÈÝÊÇÖп¼µÄÒ»¸öÈȵ㣬ÐèÒªÀÎÀÎÕÆÎÕ£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿