½ü¼¸Äê»·±£µÍ̼·ç¾¢´µ£¬»ìºÏ¶¯Á¦Æû³µÒѳÉΪ³µÕ¹Éϵġ°³£¿Í¡±£®2010Äê3Ô£¬ÎÒ¹ú×ÔÐÐÑÐÖƵÄÒ»¿î»ìºÏ¶¯Á¦Æû³µÒ²ÔÚ±±¾©³µÕ¹ÉÏÕ¹³ö£®»ìºÏ¶¯Á¦Æû³µÆô¶¯Ê±£¬ÄÚȼ»ú²¢²»¹¤×÷£¬¶¯Á¦µç³Øͨ¹ýÇý¶¯µç»úÏò³µÂÖÊäËÍÄÜÁ¿£»µ±¸ßËÙÐÐÊ»»ò¶¯Á¦µç³Ø´¢´æµçÄܹýµÍʱ£¬ÄÚȼ»úÆô¶¯£¬¼È¿ÉÒÔÏò³µÂÖÊäËÍÄÜÁ¿£¬Ò²¿ÉÒÔͬʱ¸ø¶¯Á¦µç³Ø³äµç£»µ±³µÁ¾ÐèҪȫÁ¦¼ÓËÙʱ£¬ÄÚȼ»úºÍ¶¯Á¦µç³Ø»¹¿ÉÒÔͬʱ¸ø¶¯Á¦µç³Ø³äµç£»µ±³µÁ¾ÐèҪȫÁ¦¼ÓËÙʱ£¬ÄÚȼ»úºÍ¶¯Á¦µç³Ø»¹¿ÉÒÔͬʱÏò³µÂÖÊäËÍÄÜÁ¿£®
£¨1£©¸Ã»ìºÏ¶¯Á¦Æû³µÆô¶¯Ê±£¬ÈôÇý¶¯µç»úÁ½¶ËµÄµçѹΪ250V£¬Í¨¹ýµÄµçÁ÷Ϊ80A£¬ÔòÇý¶¯µç»úµÄµç¹¦ÂÊΪ¶à´ó£¿
£¨2£©¸Ã»ìºÏ¶¯Á¦Æû³µËùÓõÄÁ×ËáÌú﮶¯Á¦µç³Ø¿É´¢´æµÄ×î´óµçÄÜΪ2.88¡Á107J£¬Èô³äµçµçѹΪ320V£¬³äµçµçÁ÷Ϊ50A£¬Ôò¶Ô¶¯Á¦µç³Ø³äµçµÄʱ¼ä×Ϊ¶àÉÙ£¿£¨³äµçʱÎÞÄÜÁ¿ËðºÄ£©
£¨3£©¸Ã»ìºÏ¶¯Á¦Æû³µÔÚƽֱ¹«Â·ÉÏÒÔ72km/hÔÈËÙÐÐÊ»10minºó£¬ÆäÄÚȼ»úÏûºÄÁËÆûÓÍ1.2kg£¬¼ÙÉèÆûÓÍÍêȫȼÉÕËùÊÍ·ÅÄÜÁ¿µÄÒ»°ëת»¯ÎªÇ£ÒýÁ¦×ö¹¦ºÍ¸ø¶¯Á¦µç³Ø³äµç£¬ÆäÖж¯Á¦µç³Ø´¢´æµÄµçÄÜÔö¼ÓÁË7.2¡Á106J£¬ÊÔÇóÆû³µÊܵ½µÄ×èÁ¦ÊǶà´ó£¿£¨ÆûÓ͵ÄÈÈÖµq=4.6¡Á107J/kg£¬ÇÒQ·Å=qm£©
·ÖÎö£º£¨1£©ÒÑÖªÇý¶¯µç»úÁ½¶ËµÄµçѹºÍͨ¹ýµÄµçÁ÷£¬¸ù¾Ý¹«Ê½P=UI¿ÉÇóÇý¶¯µç»úµÄµç¹¦ÂÊ£®
£¨2£©¸ù¾Ý¹«Ê½W=UIt¿É¼ÆËã³ö¶¯Á¦µç³Ø³äµçµÄʱ¼ä£®
£¨3£©ÏȼÆËãÆûÓͲ»ÍêȫȼÉÕÊͷŵÄÈÈÁ¿£¬ÆûÓÍÓÃÀ´×ö¹¦µÄÄÜÁ¿¾ÍµÈÓÚÊͷŵÄÈÈÁ¿¼õÈ¥¶¯Á¦µç³ØÔö¼ÓµÄÄÜÁ¿£¬Æû³µ¿Ë·þ×èÁ¦×ö¹¦£¬¸ù¾Ý¹«Ê½W=FS£¬¿ÉÇóÆû³µÊܵ½µÄ×èÁ¦F×è
W
S
£®
½â´ð£º½â£º£¨1£©P=UI=250V¡Á80A=20000W£»
´ð£ºÇý¶¯µç»úµÄµç¹¦ÂÊΪ20000W£®
£¨2£©W=UIt
t=
W
UI
=
2.88¡Á107J
320V¡Á50A
=1800s
£®
´ð£º¶Ô¶¯Á¦µç³Ø³äµçµÄʱ¼ä×Ϊ1800s£®
£¨3£©ÆûÓÍÍêȫȼÉշųöµÄÈÈÁ¿£ºQ·Å=qm=4.6¡Á107J/kg¡Á1.2kg=5.52¡Á107J
Æû³µÇ£ÒýÁ¦×öµÄ¹¦£ºW=50%Q·Å-Wµç=2.76¡Á107J-7.2¡Á106J=2.04¡Á107J
Æû³µÐÐʻʱ¼äΪ£ºt=10min=
1
6
h
Æû³µÐÐʻ·³Ì£ºS=vt=72km/h¡Á
1
6
h=12km=1.2¡Á104m
Æû³µÇ£ÒýÁ¦×ö¹¦µÈÓÚ¿Ë·þ×èÁ¦×ö¹¦W=F×èS
ËùÒÔ×èÁ¦Îª£ºF×è=
W
S
=
2.04¡Á107j
1.2¡Á104m
=1700N
´ð£ºÆû³µÊܵ½µÄ×èÁ¦ÊÇ1700N£®
µãÆÀ£º±¾Ì⿼²éÏûºÄµç¹¦ÂʵļÆË㣬ͨµçʱ¼äµÄ¼ÆË㣬ÒÔ¼°ÆûÓÍ×ö¹¦µÄ¼ÆËãºÍÆû³µËùÊÜ×èÁ¦µÄ¼ÆË㣮
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

½ü¼¸Äê»·±£µÍ̼·ç¾¢´µ£¬»ìºÏ¶¯Á¦Æû³µÒѳÉΪ³µÕ¹Éϵġ°³£¿Í¡±£®»ìºÏ¶¯Á¦Æû³µÆô¶¯Ê±£¬ÄÚȼ»ú²¢²»¹¤×÷£¬¶¯Á¦µç³Øͨ¹ýÇý¶¯µç»úÏò³µÂÖÊäËÍÄÜÁ¿£»µ±¸ßËÙÐÐÊ»»ò¶¯Á¦µç³Ø´¢´æµçÄܹýµÍʱ£¬ÄÚȼ»úÆô¶¯£¬¼È¿ÉÒÔÏò³µÂÖÊäËÍÄÜÁ¿£¬Ò²¿ÉÒÔͬʱ¸ø¶¯Á¦µç³Ø³äµç£®µ±»ìºÏ¶¯Á¦Æû³µÔÚƽֱ¹«Â·ÉÏÒÔ72km/hÔÈËÙÐÐÊ»10minºó£¬ÆäÄÚȼ»úÏûºÄÁËÆûÓÍ1.2kg£¬¼ÙÉèÆûÓÍÍêȫȼÉÕËùÊÍ·ÅÄÜÁ¿µÄÒ»°ëת»¯ÎªÇ£ÒýÁ¦×ö¹¦ºÍ¸ø¶¯Á¦µç³Ø³äµç£¬ÆäÖж¯Á¦µç³Ø´¢´æµÄµçÄÜÔö¼ÓÁË7.2¡Á106J£®ÊÔÇó£º
£¨1£©ÆûÓÍÍêȫȼÉÕËùÊÍ·ÅÄÜÁ¿ÊǶàÉÙ½¹¶ú£¿
£¨2£©Ç£ÒýÁ¦×ö¹¦¶àÉÙ½¹¶ú£¿Ç£ÒýÁ¦µÄ¹¦ÂÊÊǶàÉÙ£¿
£¨3£©Æû³µÊܵ½µÄ×èÁ¦ÊǶà´ó£¿£¨ÆûÓ͵ÄÈÈÖµq=4.6¡Á107J/kg£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

½ü¼¸Äê»·±£µÍ̼·ç¾¢´µ£¬»ìºÏ¶¯Á¦Æû³µÒѳÉΪ³µÕ¹Éϵġ°³£¿Í¡±£®2010Äê3Ô£¬ÎÒ¹ú×ÔÐÐÑÐÖƵÄÒ»¿î»ìºÏ¶¯Á¦Æû³µÒ²ÔÚ±±¾©³µÕ¹ÉÏÕ¹³ö£®»ìºÏ¶¯Á¦Æû³µÆô¶¯Ê±£¬ÄÚȼ»ú²¢²»¹¤×÷£¬¶¯Á¦µç³Øͨ¹ýÇý¶¯µç»úÏò³µÂÖÊäËÍÄÜÁ¿£»µ±¸ßËÙÐÐÊ»»ò¶¯Á¦µç³Ø´¢´æµçÄܹýµÍʱ£¬ÄÚȼ»úÆô¶¯£¬¼È¿ÉÒÔÏò³µÂÖÊäËÍÄÜÁ¿£¬Ò²¿ÉÒÔͬʱ¸ø¶¯Á¦µç³Ø³äµç£»µ±³µÁ¾ÐèҪȫÁ¦¼ÓËÙʱ£¬ÄÚȼ»úºÍ¶¯Á¦µç³Ø»¹¿ÉÒÔͬʱ¸ø¶¯Á¦µç³Ø³äµç£»µ±³µÁ¾ÐèҪȫÁ¦¼ÓËÙʱ£¬ÄÚȼ»úºÍ¶¯Á¦µç³Ø»¹¿ÉÒÔͬʱÏò³µÂÖÊäËÍÄÜÁ¿£®
£¨1£©¸Ã»ìºÏ¶¯Á¦Æû³µÆô¶¯Ê±£¬ÈôÇý¶¯µç»úÁ½¶ËµÄµçѹΪ250V£¬Í¨¹ýµÄµçÁ÷Ϊ80A£¬ÔòÇý¶¯µç»úµÄµç¹¦ÂÊΪ¶à´ó£¿
£¨2£©¸Ã»ìºÏ¶¯Á¦Æû³µËùÓõÄÁ×ËáÌú﮶¯Á¦µç³Ø¿É´¢´æµÄ×î´óµçÄÜΪ2.88¡Á107J£¬Èô³äµçµçѹΪ320V£¬³äµçµçÁ÷Ϊ50A£¬Ôò¶Ô¶¯Á¦µç³Ø³äµçµÄʱ¼ä×Ϊ¶àÉÙ£¿£¨³äµçʱÎÞÄÜÁ¿ËðºÄ£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º

£¨2013?ºÓÎ÷Çø¶þÄ££©½ü¼¸Äê»·±£µÍ̼·ç¾¢´µ£¬»ìºÏ¶¯Á¦Æû³µÒѳÉΪ³µÕ¹Éϵġ°³£¿Í¡±£®»ìºÏ¶¯Á¦Æû³µÆô¶¯Ê±£¬ÄÚȼ»ú²¢²»¹¤×÷£¬¶¯Á¦µç³Øͨ¹ýÇý¶¯µç»úÏò³µÂÖÊäËÍÄÜÁ¿£»µ±¸ßËÙÐÐÊ»»ò¶¯Á¦µç³Ø´¢´æµçÄܹýµÍʱ£¬ÄÚȼ»úÆô¶¯£¬¼È¿ÉÒÔÏò³µÂÖÊäËÍÄÜÁ¿£¬Ò²¿ÉÒÔͬʱ¸ø¶¯Á¦µç³Ø³äµç£®Í¼1Ϊij¿îÆû³µÖ±ÁÐËĸ׷¢¶¯»úµÄ¹¤×÷Ô­Àí£¬ÄÚȼ»úͨ¹ýÁ¬¸Ë°ÑÆû³µËĸöÆø¸×µÄ»îÈûÁ¬ÔÚÒ»¸ùÇúÖáÉÏ£¬²¢Ê¹¸öÆø¸×µÄ×ö¹¦¹ý³Ì´í¿ª£¬ÔÚ·ÉÂÖת¶¯µÄÿ°ëÖÜÀ¶¼ÓÐÒ»¸öÆø¸×ÔÚ×ö¹¦£¬ÆäËûÈý¸öÆø¸×·Ö±ðÔÚ×öÎüÆø£¬Ñ¹ËõºÍÅÅÆø¹¤×÷£¬Í¼2Ëùʾ£¬ÆûÓÍ»úµÄ»îÈûÃæ»ýΪSm2£¬»îÈû³å³Ì³¤¶ÈΪLm£¬·ÉÂֵĴ«µÝΪn t/min£®
   ΪÕâÁ¾Ö±ÁÐËĸ׷¢¶¯»ú»ìºÏ¶¯Á¦Æû³µÔÚƽֱ¹«Â·ÉÏÒԽϸߵÄËÙ¶Èvkm/hÔÈËÙÐÐÊ»t min£®Ê±¼äºó£¬ÆäÄÚȼ»úÏûºÄm kg£¬¼ÙÉèÆûÓÍÍêȫȼÉÕËùÊÍ·ÅÄÜÁ¿µÄ50%ת»¯ÎªÇ£ÒýÁ¦×ö¹¦ºÍ¸ø¶¯Á¦µç³Ø³äµç£®ÆäÖж¯Á¦µç³Ø´¢´æµÄµçÄÜÔö¼ÓÁËW J£®£¨ÆûÓ͵ÄÈÈֵΪqJ/kg£©ÊÔÇó£º
£¨1£©Ç£ÒýÁ¦×ö¹¦¶àÉÙ½¹¶ú£¿Ç£ÒýÁ¦µÄ¹¦ÂÊÊǶàÉÙÍߣ¿
£¨2£©Æû³µÊܵ½µÄ×èÁ¦ÊǶàÉÙÅ££¿
£¨3£©Èô·¢¶¯»úµÄÊä³ö¹¦ÂÊΪPW£¬ÔÚËĸ׷¢¶¯»úÒ»¸ö×ö¹¦³å³ÌÀȼÆø¶Ô»îÈûѹǿ¿ÉÒÔ¿´×÷ºãѹ£¬Ôò×ö¹¦³å³ÌȼÆøµÄƽ¾ùѹǿpΪ¶àÉÙÅÁ£¿£¨ºöÂÔ»îÈûÓëÆø¸×¼äµÄĦ²Á£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º2012-2013ѧÄê½­ËÕÎÞÎýÇ°ÖÞÖÐѧ¾ÅÄ꼶ÉÏѧÆÚÆÚÖп¼ÊÔÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£º¼ÆËãÌâ

½ü¼¸Äê»·±£µÍ̼·ç¾¢´µ£¬»ìºÏ¶¯Á¦Æû³µÒѳÉΪ³µÕ¹Éϵġ°³£¿Í¡±£®»ìºÏ¶¯Á¦Æû³µÆô¶¯Ê±£¬ÄÚȼ»ú²¢²»¹¤×÷£¬¶¯Á¦µç³Øͨ¹ýÇý¶¯µç»úÏò³µÂÖÊäËÍÄÜÁ¿£»µ±¸ßËÙÐÐÊ»»ò¶¯Á¦µç³Ø´¢´æµçÄܹýµÍʱ£¬ÄÚȼ»úÆô¶¯£¬¼È¿ÉÒÔÏò³µÂÖÊäËÍÄÜÁ¿£¬Ò²¿ÉÒÔͬʱ¸ø¶¯Á¦µç³Ø³äµç£®µ±»ìºÏ¶¯Á¦Æû³µÔÚƽֱ¹«Â·ÉÏÒÔ72km/hÔÈËÙÐÐÊ»10minºó£¬ÆäÄÚȼ»úÏûºÄÁËÆûÓÍ1.2kg£¬¼ÙÉèÆûÓÍÍêȫȼÉÕËùÊÍ·ÅÄÜÁ¿µÄÒ»°ëת»¯ÎªÇ£ÒýÁ¦×ö¹¦ºÍ¸ø¶¯Á¦µç³Ø³äµç£¬ÆäÖж¯Á¦µç³Ø´¢´æµÄµçÄÜÔö¼ÓÁË7.2¡Á106J¡£ÊÔÇó£º

£¨1£©ÆûÓÍÍêȫȼÉÕËùÊÍ·ÅÄÜÁ¿ÊǶàÉÙ½¹¶ú£¿£¨2·Ö£©

£¨2£©Ç£ÒýÁ¦×ö¹¦¶àÉÙ½¹¶ú£¿Ç£ÒýÁ¦µÄ¹¦ÂÊÊǶàÉÙ£¿£¨3·Ö£©

£¨3£©Æû³µÊܵ½µÄ×èÁ¦ÊǶà´ó£¿£¨ÆûÓ͵ÄÈÈÖµq=4.6¡Á107J/kg£©£¨2·Ö£©

 

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸