18£®ÎïÀíÐËȤС×éΪÁË̽¾¿µØÇò±íÃæË®ÎüÊÕÌ«ÑôÄܵı¾Á죬×öÁËÈçÏÂʵÑ飺ÓÃÒ»Á³Åè×°6kgµÄË®£¬Ë®µÄ±íÃæ»ýΪ0.1m2£¬¾­¹ýÌ«Ñô¹â´¹Ö±ÕÕÉä15min£¬Ë®ÎÂÉý¸ßÁË5¡æ£®¡¾cË®=4.2¡Á103J/£¨kg•¡æ£©£¬qÆø=3¡Á107J/m3¡¿£®ÎÊ£º
£¨1£©ÊµÑéʱ6kgµÄË®15minÄÚÎüÊÕÁ˶àÉÙÈÈÄÜ£¿
£¨2£©ÈôÓüÓÈȵķ½Ê½Ê¹Í¬ÖÊÁ¿µÄË®Éý¸ßÏàͬµÄζȣ¬ÖÁÉÙÐèҪȼÉÕ¶àÉÙm3µÄÒº»¯Æø£¿£¨¼ÙÉèÒº»¯ÆøȼÉշųöµÄÈÈÁ¿È«²¿±»Ë®ÎüÊÕ£©
£¨3£©·ÖÎöÌ«ÑôÄÜÈÈË®Æ÷¶ÔÏÖ´úÉú»îµÄÓŵãÓÐÄÇЩ£¿£¨Ð´2µã£©

·ÖÎö £¨1£©ÖªµÀË®µÄÖÊÁ¿¡¢Ë®µÄ³õκÍĩΡ¢Ë®µÄ±ÈÈÈÈÝ£¬ÀûÓÃÎüÈȹ«Ê½ÇóË®ÎüÊÕµÄÈÈÁ¿£»
£¨2£©ÓÉÌâÖª£¬Òº»¯ÆøȼÉշųöµÄÈÈÁ¿È«²¿±»Ë®ÎüÊÕ£¬ÖªµÀÒº»¯ÆøµÄÈÈÖµ£¬ÀûÓÃQÎü=Q·Å=VqÇóÐèÒªµÄÒº»¯ÆøµÄÌå»ý£»
£¨3£©´Ó»·±£¡¢½ÚÔ¼ÄÜÔ´£¨Ê¡Ç®£©¡¢È¡Ö®²»¾¡µÈ·½ÃæÁоÙÌ«ÑôÄÜÈÈË®Æ÷µÄÓŵ㣮

½â´ð ½â£º
£¨1£©Ë®ÎüÊÕµÄÈÈÁ¿£º
QÎü=cm¡÷t=4.2¡Á103J/£¨kg•¡æ£©¡Á6kg¡Á5¡æ=1.26¡Á105J£»
£¨2£©ÓÉÌâÖª£¬Q·Å=Vq=QÎü=1.26¡Á105J£¬
ÐèÒªÒº»¯ÆøµÄÌå»ý£º
V=$\frac{{Q}_{·Å}}{q}$=$\frac{1.26¡Á1{0}^{5}J}{3¡Á1{0}^{7}J/{m}^{3}}$=4.2¡Á10-3m3£»
£¨3£©Ì«ÑôÄÜÈÈË®Æ÷Êǽ«Ì«ÑôÄÜת»¯ÎªÄÚÄÜ£¬±»Ë®ÎüÊÕ£¬Î¶ÈÉý¸ß£¬¹©ÈËʹÓ㬶Ի·¾³ÎÞÎÛȾ£»½ÚÔ¼ÄÜÔ´£¨Ê¡Ç®£©£»È¡Ö®²»¾¡ÓÃÖ®²»½ßµÈ£®
´ð£º£¨1£©ÊµÑéʱ6kgµÄË®15minÄÚÎüÊÕÁË1.26¡Á105JµÄÈÈÁ¿£»
£¨2£©ÖÁÉÙÐèҪȼÉÕ4.2¡Á10-3m3µÄÒº»¯Æø£»
£¨3£©Ì«ÑôÄÜÈÈË®Æ÷µÄÓŵ㣺ȡ֮²»¾¡£¬ÓÃÖ®²»½ß£»½ÚÄÜ»·±££¬Çå½àÎÞÎÛȾµÈ£®

µãÆÀ ±¾Ì⿼²éÁËѧÉú¶ÔÎüÈȹ«Ê½QÎü=cm¡÷t¡¢È¼ÁÏÍêȫȼÉÕ·ÅÈȹ«Ê½Q·Å=VqµÄÕÆÎÕºÍÔËÓ㬼ÆËãʱעÒâÆøÌåȼÁÏÈÈÖµµÄµ¥Î»ÊÇJ/m3£¬²»ÊÇJ/kg£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

2£®ÈçͼÊÇÓò»Í¸Ã÷µÄºñ¿Ì¶È³ß²âÁ¿Ò»Ä¾¿éµÄ³¤¶È£¬ÄãÈÏΪÕýÈ·µÄÊÇ£¨¡¡¡¡£©
A£®B£®C£®D£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ

9£®Á½¸ö¶¨Öµµç×èÖ®±ÈR1£ºR2=3£º2£¬ÏÖ½«ËüÃDz¢Áª½ÓÔÚͬһ¸öµçÔ´ÉÏ£¬ÔòËüÃǵĵ繦ÂÊÖ®±ÈP1£ºP2Ϊ2£º3£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑé̽¾¿Ìâ

6£®ÊµÑéÊÇÎïÀíµÄÁé»ê£®ÏÂÃæÁ½¸ö¾­µäʵÑ齫¿¼ÑéÄãµÄÖǻۣ¬×¼±¸ºÃÁËÂð£¿
СÀûµÈͬѧ°´Èçͼ¼×Ëùʾµç·À´Ì½¾¿¡°Í¨¹ýµç×èµÄµçÁ÷ÓëÆäÁ½¶ËµçѹµÄ¹Øϵ¡±£®ÒÑÖªµçÔ´µçѹΪ8V£¬¶¨Öµµç×èR1=20¦¸£®

¢Ù¸ù¾Ýͼ¼×Óñʻ­Ïß´úÌæµ¼Ïߣ¬½«Í¼ÒÒÖÐʵÎïµç·Á¬½ÓºÃ£®ÒªÇ󻬶¯±ä×èÆ÷»¬Æ¬PÏòÓÒÒƶ¯Ê±£¬µçÁ÷±íʾÊý±äС£»
¢ÚÁ¬½ÓÍêµç·ºó£¬±ÕºÏ¿ª¹Ø£¬·¢ÏÖµçÁ÷±íÖ¸Õ벻ƫת£¬µçѹ±íÓÐʾÊý£¬Ôò¹ÊÕÏ¿ÉÄÜÊǵç×è¶Ï·£»¹ÊÕÏÅųýºó£¬ÔÚʵÑéÖз¢ÏÖÎÞÂÛÔõÑùµ÷½Ú»¬¶¯±ä×èÆ÷£¬µçÁ÷±íʾÊý±ä»¯²»´ó£¬ËûÃÇÈÏΪ³öÏÖÕâÖÖÇé¿öµÄÔ­Òò¿ÉÄÜÊÇ»¬¶¯±ä×èÆ÷£¬µçÁ÷±íʾÊý±ä»¯²»´ó£¬ËûÃÇÈÏΪ³öÏÖÕâÖÖÇé¿öµÄÔ­Òò¿ÉÄÜÊÇ»¬¶¯±ä×èÆ÷Ñ¡Ôñ²»ºÏÀí£®ÏÖÓÐÈçÏÂA¡¢BÁ½ÖÖ»¬¶¯±ä×èÆ÷¿É¹©Ñ¡Ôñ£¬ÄÇôËûÃÇӦѡÔñA£¨Ìî×Öĸ£©£»
A£®100¦¸¡¢1A         B£®5¦¸¡¢2A
¢ÛʵÑéÖÐСÀû½«ÊµÑéËùµÃµÄÊý¾ÝÃè»æÔÚͼ±ûÖУ¬ÔòͼÖÐÒõÓ°²¿·ÖÃæ»ý±íʾµÄÎïÀíÁ¿ÊÇD£¨Ìî×Öĸ£©£®
A£®¶¨Öµµç×èÁ½¶ËµÄµçѹB£®Í¨µç¶¨Öµµç×èµÄµçÁ÷
C£®¶¨Öµµç×èµÄ×èÖµD£®¶¨Öµµç×èÏûºÄµÄµç¹¦ÂÊ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

13£®Ð¡Ìïѧϰ¿Æѧºó£¬¶Ô³éÑ̵İְÖ˵£º¡°ÎüÑÌÓк¦½¡¿µ£¬ÎÒºÍÂèÂ趼ÔÚ±»¶¯³éÑÌ£®¡±Ð¡ÌïÕâÑù˵µÄ¿ÆѧÒÀ¾ÝÊÇ£¨¡¡¡¡£©
A£®·Ö×ÓºÜÉÙÔ˶¯B£®·Ö×ÓÔÚ²»¶ÏÔ˶¯
C£®·Ö×ÓÖ®¼äÓмä϶D£®·Ö×ÓÖ®¼äÓÐ×÷ÓÃÁ¦

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

3£®ÁÚ¾Ó¼Ò²¥·ÅµÄÒôÀÖÉùÁîÀÎÞ·¨ÎçÐÝ£¬ËûÖ»ºÃ´øÉ϶úÕÖ£¬ÒÔ¼õÈõÔëÉùµÄÓ°Ï죬À¼õÈõÔëÉùµÄ·½·¨ÊÇ£¨¡¡¡¡£©
A£®ÔÚÉùÔ´´¦¼õÈõB£®ÔÚÈ˶ú´¦¼õÈõ
C£®ÔÚ´«²¥¹ý³ÌÖмõÈõD£®ÒÔÉ϶¼ÕýÈ·

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

10£®ÈçͼËùʾµç·ÖУ¬¿ª¹ØSÄÜͬʱ¿ØÖƵçµÆºÍµçÁåµÄÊÇ£¨¡¡¡¡£©
A£®B£®C£®D£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ

7£®ÈËÃÇÔÚÈÕ³£Éú»îÖÐʹÓõÄζȼƣ¬ÊǸù¾ÝÒºÌåÈÈÕÍÀäËõµÄÐÔÖÊÖƳɵģ®ÈçͼÊÇijÈ˲âÁ¿ÌåκóÌåμƵÄʾÊý£¬ÔòËûµÄÌåÎÂÊÇ38.4¡æ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÊµÑé̽¾¿Ìâ

8£®ÈçͼËùʾ£¬ÊÇСÃ÷Éè¼ÆµÄ²âÁ¿´ý²âµç×èRxµÄµç·ͼ£¬ÆäÖÐR0µÄ×èÖµÒÑÖª£¬ÊµÑé²½ÖèÊÇ£º
A£®Ö»±ÕºÏ¿ª¹ØS1£¬¹Û²ì²¢¼Ç¼µçÁ÷±íµÄʾÊýI1£»
B£®Ö»±ÕºÏ¿ª¹ØS2£¬¹Û²ì²¢¼Ç¼µçÁ÷±íµÄʾÊýI2£»µç×èµÄ±í´ïʽÊÇRx=$\frac{{I}_{1}{R}_{0}}{{I}_{2}}$£¬µçÔ´µÄµçѹ´óС±í´ïʽÊÇU=I1R0£®

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸