I£®ÎªÁË̽¾¿¼ÓËÙ¶ÈÓëÁ¦µÄ¹Øϵ£¬Ê¹ÓÃÈçͼ1ËùʾµÄÆøµæµ¼¹ì×°ÖýøÐÐʵÑ飮ÆäÖÐG1¡¢G2ΪÁ½¸ö¹âµçÃÅ£¬ËüÃÇÓëÊý×Ö¼ÆʱÆ÷ÏàÁ¬£¬µ±»¬ÐÐÆ÷ͨ¹ýGl¡¢G2¹âµçÃÅʱ£¬¹âÊø±»ÕÚµ²µÄʱ¼ä¡÷t1¡¢¡÷t2¶¼¿ÉÒÔ±»²âÁ¿²¢¼Ç¼£®»¬ÐÐÆ÷Á¬Í¬ÉÏÃæ¹Ì¶¨µÄÒ»ÌõÐε²¹âƬµÄ×ÜÖÊÁ¿ÎªM£¬µ²¹âƬ¿í¶ÈΪD£¬¹âµçÃżä¾àÀëΪs£¬Ç£ÒýíÀÂëµÄÖÊÁ¿Îªm£®»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©ÊµÑ鿪ʼӦÏȵ÷½ÚÆøµæµ¼¹ìÏÂÃæµÄÂݶ¤£¬Ê¹Æøµæµ¼¹ìˮƽ£¬ÔÚ²»Ôö¼ÓÆäËüÒÇÆ÷µÄÇé¿öÏ£¬ÈçºÎÅж¨µ÷½ÚÊÇ·ñµ½Î»£¿´ð£º______£®
£¨2£©ÈôÈ¡M=0.4kg£¬¸Ä±ämµÄÖµ£¬½øÐжà´ÎʵÑ飬ÒÔÏÂmµÄÈ¡Öµ²»ºÏÊʵÄÒ»¸öÊÇ______£®
A£®m1=5g    B£® m2=15g    C£®m3=40g    D£®m4=400g
£¨3£©ÔÚ´ËʵÑéÖУ¬ÐèÒª²âµÃÿһ¸öÇ£ÒýÁ¦¶ÔÓ¦µÄ¼ÓËٶȣ¬ÆäÖÐÇóµÃµÄ¼ÓËٶȵıí´ïʽΪ£º______2-
1
¡÷
t21
)
¡¾´ð°¸¡¿·ÖÎö£ºI£®£¨1£©ÔÚ¡°Ñé֤ţ¶ÙµÚ¶þ¶¨ÂÉ¡±µÄʵÑéÖУ¬Í¨¹ý¿ØÖƱäÁ¿·¨£¬ÏÈ¿ØÖÆmÒ»¶¨£¬ÑéÖ¤aÓëF³ÉÕý±È£¬ÔÙ¿ØÖÆFÒ»¶¨£¬ÑéÖ¤aÓëm³É·´±È£»ÊµÑéÖÐÓù´ÂëµÄÖØÁ¦´úÌæС³µµÄºÏÁ¦£¬¹ÊҪͨ¹ý½«³¤Ä¾°åÓҶ˵æ¸ßÀ´Æ½ºâĦ²ÁÁ¦ºÍʹС³µÖÊÁ¿Ô¶´óÓÚ¹´ÂëÖÊÁ¿À´¼õСʵÑéµÄÎó²î£¡ÏÈÇó³ö»¬ÐÐÆ÷ͨ¹ýÁ½¸ö¹âµçÃŵÄËٶȣ¬ÔÙ¸ù¾ÝÔȼÓËÙÖ±ÏßÔ˶¯Î»ÒÆËٶȹ«Ê½Çó½â¼ÓËٶȣ»
II£®£¨1£©µçѹ±í±¾ÉíÊÇ´¿µç×裬¸ù¾Ý´®²¢Áªµç·µçѹ¹ØϵµÃµ½µç×èÏäµÄµçѹ£¬Ëã³öµçÁ÷£¬´Ó¶ø¿ÉÒÔ¼ÆËã³öÓëµç×èÏä´®ÁªµÄÄÇÖ»µçѹ±íµÄµç×èÖµ£»
£¨2£©¸ù¾Ý´®²¢Áªµç·µçѹµÄ¹ØϵÇó³öµç×èÏäµÄµçѹ£¬Ëã³öµçÁ÷£¬×îºó¼ÆËã³öÓëµç×èÏä´®ÁªµÄÄÇÖ»µçѹ±íµÄµç×èÖµ£¬Ð´³ö·½³Ì£¬Óɽá¹ûÌÖÂÛ·ÖÎö£®
½â´ð£º½â£ºI£®£¨1£©ÊµÑ鿪ʼӦÏȵ÷½ÚÆøµæµ¼¹ìÏÂÃæµÄÂݶ¤£¬Ê¹Æøµæµ¼¹ìˮƽ£¬Èû¬ÐÐÆ÷×ÔÓÉ×öÔÈËÙÖ±ÏßÔ˶¯£¬
ËùÒÔ½«»¬ÐÐÆ÷×ÔÓÉ·ÅÔÚµ¼¹ìÉÏ£¬²¢ÇáÍÆ»¬ÐÐÆ÷£¬¿´ÆäÄÜ·ñ×öÔÈËÙÔ˶¯¼´¿ÉÅжÏÊÇ·ñµ½Î»£»
£¨2£©ÔÚ¡°Ñé֤ţ¶ÙµÚ¶þ¶¨ÂÉ¡±µÄʵÑéÓÿØÖƱäÁ¿·¨£¬±¾ÊµÑéÔÚÂú×ãС³µÖÊÁ¿Ô¶´óÓÚ¹³ÂëÖÊÁ¿µÄÌõ¼þÏ£¬²ÅÄÜÓù³ÂëÖØÁ¦´úÌæС³µËùÊܵĺÏÁ¦£¬D´ð°¸²»ÄÜÂú×ã´ËÌõ¼þ£®¹ÊÑ¡D    
£¨3£©ÓÉÌâÒâµÃ£º»¬ÐÐÆ÷ͨ¹ýGlµÄËÙ¶ÈΪ£ºv1=£¬v2=
¸ù¾Ý2as=
½âµÃ£ºa=
II£®£º£¨1£©¸ù¾Ý´®²¢Áªµç·µçѹ¹ØϵµÃµ½µç×èÏäµÄµçѹµÈÓÚÁ½¸öµçѹ±íµÄ¶ÁÊýÖ®²î£¬¸ù¾ÝÅ·Ä·¶¨ÂÉËã³öͨ¹ýµç×èÏäµÄµçÁ÷£¬´Ó¶ø¿ÉÒÔ¼ÆËã³öÓëµç×èÏä´®ÁªµÄÄÇÖ»µçѹ±íµÄµç×èÖµ£»
±¾ÌâÊÇ°´2ͼÉè¼ÆµÄµç·²âÁ¿µÄ£¬ÎªÊ¹²âÁ¿ÒýÆðµÄ¶ÁÊýÎó²î½ÏСÁ½µçѹ±íÁ¿³Ì±ØÐëÏà½ü£¬ËùÒÔÖ»Äܾ«È·²âÁ¿V2¡¢V3Á½¿éµçѹ±íµÄÄÚ×裮
¹Ê´ð°¸Îª£ºV2¡¢V3£»
£¨2£©¶Á³öµçѹ±íV¡¢V¡äµÄʾÊýU¡¢U¡ä£¬Ôòµç×èÏäµÄµçѹΪ£ºUR1=U¡ä-U£»
ͨ¹ýµç×èÏäµÄµçÁ÷Ϊ£ºIR1==
ͨ¹ýµç×èÏäµÄµçÁ÷µÈÓÚͨ¹ýµçѹ±íVµÄµçÁ÷£¬¹Êµçѹ±íVµÄµç×èΪ£ºRV==
¹Ê´ð°¸Îª£ºI£®£¨1£©½«»¬ÐÐÆ÷×ÔÓÉ·ÅÔÚµ¼¹ìÉÏ£¬²¢ÇáÍÆ»¬ÐÐÆ÷£¬¿´ÆäÄÜ·ñ×öÔÈËÙÔ˶¯£»£¨2£©D£»£¨3£©£»
II£®£¨1£©V2¡¢V3£»£¨2£©Á½µçѹ±íµÄ¶ÁÊýU¡¢U¡ä£»
µãÆÀ£º£¨1£©ÔÚ¡°Ñé֤ţ¶ÙµÚ¶þ¶¨ÂÉ¡±µÄʵÑéÓÿØÖƱäÁ¿·¨£¬±¾ÊµÑéÖ»ÓÐÔÚÂú×ãƽºâĦ²ÁÁ¦ºÍС³µÖÊÁ¿Ô¶´óÓÚ¹³ÂëÖÊÁ¿µÄË«ÖØÌõ¼þÏ£¬²ÅÄÜÓù³ÂëÖØÁ¦´úÌæС³µËùÊܵĺÏÁ¦£»
£¨2£©±¾Ìâ¹Ø¼üÒªÖªµÀ£ºµçѹ±íÊǶ¨Öµµç×裻µç×èÏä¿ÉÒÔµ±µçÁ÷±íʹÓã»»¬¶¯±ä×èÆ÷²ÉÓ÷Öѹʽ½Ó·¨Ê±Ñ¡ÓÃ×èֵСµÄ»¬¶¯±ä×èÆ÷£®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÔĶÁÀí½â

I£®ÎªÁË̽¾¿¼ÓËÙ¶ÈÓëÁ¦µÄ¹Øϵ£¬Ê¹ÓÃÈçͼ1ËùʾµÄÆøµæµ¼¹ì×°ÖýøÐÐʵÑ飮ÆäÖÐG1£®G2ΪÁ½¸ö¹âµçÃÅ£¬ËüÃÇÓëÊý×Ö¼ÆʱÆ÷ÏàÁ¬£¬µ±»¬ÐÐÆ÷ͨ¹ýGl£®G2¹âµçÃÅʱ£¬¹âÊø±»ÕÚµ²µÄʱ¼ä¡÷t1£®¡÷t2¶¼¿ÉÒÔ±»²âÁ¿²¢¼Ç¼£®»¬ÐÐÆ÷Á¬Í¬ÉÏÃæ¹Ì¶¨µÄÒ»ÌõÐε²¹âƬµÄ×ÜÖÊÁ¿ÎªM£¬µ²¹âƬ¿í¶ÈΪD£¬¹âµçÃżä¾àÀëΪs£¬Ç£ÒýíÀÂëµÄÖÊÁ¿Îªm£®»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©ÊµÑ鿪ʼӦÏȵ÷½ÚÆøµæµ¼¹ìÏÂÃæµÄÂݶ¤£¬Ê¹Æøµæµ¼¹ìˮƽ£¬ÔÚ²»Ôö¼ÓÆäËüÒÇÆ÷µÄÇé¿öÏ£¬ÈçºÎÅж¨µ÷½ÚÊÇ·ñµ½Î»£¿´ð£º
 
£®
£¨2£©ÈôÈ¡M=0.4kg£¬¸Ä±ämµÄÖµ£¬½øÐжà´ÎʵÑ飬ÒÔÏÂmµÄÈ¡Öµ²»ºÏÊʵÄÒ»¸öÊÇ
 
£®
A£®m1=5g    B£® m2=15g
C£®m3=40g    D£®m4=400g
£¨3£©ÔÚ´ËʵÑéÖУ¬ÐèÒª²âµÃÿһ¸öÇ£ÒýÁ¦¶ÔÓ¦µÄ¼ÓËٶȣ¬ÆäÖÐÇóµÃµÄ¼ÓËٶȵıí´ïʽΪ£º
 
£¨Óá÷t1£®¡÷t2£®D£®S±íʾ£©
II£®Òª²âÁ¿Ò»Ö»Á¿³ÌÒÑÖªµÄµçѹ±íµÄÄÚ×裬Ëù±¸Æ÷²ÄÈçÏ£º
A£®´ý²âµçѹ±íV£¨Á¿³Ì3V£¬ÄÚ×èδ֪£©
B£®µçÁ÷±íA£¨Á¿³Ì3A£¬ÄÚ×è0.01¦¸£©
C£®¶¨Öµµç×èR£¨×èÖµ2k¦¸£¬¶î¶¨µçÁ÷50mA£©
D£®Ðîµç³ØE£¨µç¶¯ÊÆÂÔСÓÚ3V£¬ÄÚ×è²»¼Æ£©
E£®¶àÓõç±í
F£®¿ª¹ØK1£®K2£¬µ¼ÏßÈô¸É
ÓÐһͬѧÀûÓÃÉÏÃæËù¸øÆ÷²Ä£¬½øÐÐÈçÏÂʵÑé²Ù×÷£º
¢ÙÊ×ÏÈ£¬ÓöàÓõç±í½øÐдֲ⣬ѡÓáÁ100¦¸±¶ÂÊ£¬²Ù×÷·½·¨ÕýÈ·£®ÈôÕâʱ¿Ì¶ÈÅÌÉϵÄÖ¸ÕëλÖÃÈçͼ2¼×Ëùʾ£¬Ôò²âÁ¿µÄ½á¹ûÊÇ
 
¦¸£®
¢ÚΪÁ˸ü¾«È·µØ²â³ö´Ëµçѹ±íÄÚ×裬¸ÃͬѧÉè¼ÆÁËÈçͼËùʾµÄ2ÒÒ£®±ûʵÑéµç·£¬ÄãÈÏΪÆäÖнϺÏÀíµÄµç·ͼÊÇ
 
£®ÆäÀíÓÉÊÇ
 
£®
¢ÛÔÚͼ2¶¡ÖУ¬¸ù¾ÝÄãÑ¡ÔñµÄµç·°ÑʵÎïÁ¬½ÓºÃ£®
¢ÜÓÃÄãÑ¡ÔñµÄµç·½øÐÐʵÑéʱ£¬Çë¼òÊöʵÑé²½Ö裺
 

ÓÃÉÏÊöËù²âÁ¿µÄ·ûºÅ±íʾµçѹ±íµÄÄÚ×èRV=
 
£®
¾«Ó¢¼Ò½ÌÍø

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÔĶÁÀí½â

I£®ÎªÁË̽¾¿¼ÓËÙ¶ÈÓëÁ¦µÄ¹Øϵ£¬Ê¹ÓÃÈçͼ1ËùʾµÄÆøµæµ¼¹ì×°ÖýøÐÐʵÑ飮ÆäÖÐG1¡¢G2ΪÁ½¸ö¹âµçÃÅ£¬ËüÃÇÓëÊý×Ö¼ÆʱÆ÷ÏàÁ¬£¬µ±»¬ÐÐÆ÷ͨ¹ýGl¡¢G2¹âµçÃÅʱ£¬¹âÊø±»ÕÚµ²µÄʱ¼ä¡÷t1¡¢¡÷t2¶¼¿ÉÒÔ±»²âÁ¿²¢¼Ç¼£®»¬ÐÐÆ÷Á¬Í¬ÉÏÃæ¹Ì¶¨µÄÒ»ÌõÐε²¹âƬµÄ×ÜÖÊÁ¿ÎªM£¬µ²¹âƬ¿í¶ÈΪD£¬¹âµçÃżä¾àÀëΪs£¬Ç£ÒýíÀÂëµÄÖÊÁ¿Îªm£®»Ø´ðÏÂÁÐÎÊÌ⣺¾«Ó¢¼Ò½ÌÍø
£¨1£©ÊµÑ鿪ʼӦÏȵ÷½ÚÆøµæµ¼¹ìÏÂÃæµÄÂݶ¤£¬Ê¹Æøµæµ¼¹ìˮƽ£¬ÔÚ²»Ôö¼ÓÆäËüÒÇÆ÷µÄÇé¿öÏ£¬ÈçºÎÅж¨µ÷½ÚÊÇ·ñµ½Î»£¿´ð£º
 
£®
£¨2£©ÈôÈ¡M=0.4kg£¬¸Ä±ämµÄÖµ£¬½øÐжà´ÎʵÑ飬ÒÔÏÂmµÄÈ¡Öµ²»ºÏÊʵÄÒ»¸öÊÇ
 
£®
A£®m1=5g    B£® m2=15g    C£®m3=40g    D£®m4=400g
£¨3£©ÔÚ´ËʵÑéÖУ¬ÐèÒª²âµÃÿһ¸öÇ£ÒýÁ¦¶ÔÓ¦µÄ¼ÓËٶȣ¬ÆäÖÐÇóµÃµÄ¼ÓËٶȵıí´ïʽΪ£º
 
£¨Óá÷t1¡¢¡÷t2¡¢D¡¢S±íʾ£©
II£®ÊµÑéÊÒÖÐÏÖÓÐÆ÷²ÄÈçÏ£º
µç³ØE£¬µç¶¯ÊÆÔ¼6V£¬ÄÚ×èÔ¼1¦¸
µçѹ±íV1£ºÁ¿³Ì30V£¬ÄÚ×èrlԼΪ30k¦¸
µçѹ±íV2£ºÁ¿³Ì3V£¬ÄÚ×èr2ԼΪ3k¦¸£»
µçѹ±íV3£ºÁ¿³Ì2.5V£¬ÄÚ×èr3ԼΪ2.5k¦¸£»
µç×èÏäR1£º×î´ó×èÖµ9999.9¦¸¡¢×èÖµ×îС¸Ä±äÁ¿Îª0.1¦¸£»
»¬¶¯±ä×èÆ÷R2£º×î´ó×èֵΪ50¦¸£»
µç¼üS£¬µ¼ÏßÈô¸É£®
ÒªÇóÓÃÈçͼ2ËùʾµÄµç·²â¶¨µçѹ±íÄÚ×裮
£¨1£©Óô˵ç·¿ÉÒÔ¾«È·²âÁ¿Ëù¸øÈý¿éµçѹ±íÖÐÄļ¸¿éµÄÄÚ×裿
 
£®
£¨2£©ÊµÑéÖУ¬Äã³ýÁËÒª¶Á³öµç×èÏäµÄ×èÖµR1Í⣬»¹ÐèÒª¶Á³ö
 
£¬ÓÃËù²âÊý¾Ý±íʾ´ý²âµçѹ±íÄÚ×èµÄ¼ÆË㹫ʽÊÇ
 
£®£¨Ð´³öÄܲâµÄËùÓеçѹ±íÄÚ×蹫ʽ£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

I£®ÎªÁË̽¾¿¼ÓËÙ¶ÈÓëÁ¦µÄ¹Øϵ£¬Ê¹ÓÃÈçͼ1ËùʾµÄÆøµæµ¼¹ì×°ÖýøÐÐʵÑ飮ÆäÖÐG1¡¢G2ΪÁ½¸ö¹âµçÃÅ£¬ËüÃÇÓëÊý×Ö¼ÆʱÆ÷ÏàÁ¬£¬µ±»¬ÐÐÆ÷ͨ¹ýGl¡¢G2¹âµçÃÅʱ£¬¹âÊø±»ÕÚµ²µÄʱ¼ä¡÷t1¡¢¡÷t2¶¼¿ÉÒÔ±»²âÁ¿²¢¼Ç¼£®»¬ÐÐÆ÷Á¬Í¬ÉÏÃæ¹Ì¶¨µÄÒ»ÌõÐε²¹âƬµÄ×ÜÖÊÁ¿ÎªM£¬µ²¹âƬ¿í¶ÈΪD£¬¹âµçÃżä¾àÀëΪs£¬Ç£ÒýíÀÂëµÄÖÊÁ¿Îªm£®»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©ÊµÑ鿪ʼӦÏȵ÷½ÚÆøµæµ¼¹ìÏÂÃæµÄÂݶ¤£¬Ê¹Æøµæµ¼¹ìˮƽ£¬ÔÚ²»Ôö¼ÓÆäËüÒÇÆ÷µÄÇé¿öÏ£¬ÈçºÎÅж¨µ÷½ÚÊÇ·ñµ½Î»£¿´ð£º______£®
£¨2£©ÈôÈ¡M=0.4kg£¬¸Ä±ämµÄÖµ£¬½øÐжà´ÎʵÑ飬ÒÔÏÂmµÄÈ¡Öµ²»ºÏÊʵÄÒ»¸öÊÇ______£®
A£®m1=5g¡¡¡¡B£® m2=15g¡¡¡¡C£®m3=40g¡¡¡¡D£®m4=400g
£¨3£©ÔÚ´ËʵÑéÖУ¬ÐèÒª²âµÃÿһ¸öÇ£ÒýÁ¦¶ÔÓ¦µÄ¼ÓËٶȣ¬ÆäÖÐÇóµÃµÄ¼ÓËٶȵıí´ïʽΪ£º______£¨Óá÷t1¡¢¡÷t2¡¢D¡¢S±íʾ£©
II£®ÊµÑéÊÒÖÐÏÖÓÐÆ÷²ÄÈçÏ£º
µç³ØE£¬µç¶¯ÊÆÔ¼6V£¬ÄÚ×èÔ¼1¦¸
µçѹ±íV1£ºÁ¿³Ì30V£¬ÄÚ×èrlԼΪ30k¦¸
µçѹ±íV2£ºÁ¿³Ì3V£¬ÄÚ×èr2ԼΪ3k¦¸£»
µçѹ±íV3£ºÁ¿³Ì2.5V£¬ÄÚ×èr3ԼΪ2.5k¦¸£»
µç×èÏäR1£º×î´ó×èÖµ9999.9¦¸¡¢×èÖµ×îС¸Ä±äÁ¿Îª0.1¦¸£»
»¬¶¯±ä×èÆ÷R2£º×î´ó×èֵΪ50¦¸£»
µç¼üS£¬µ¼ÏßÈô¸É£®
ÒªÇóÓÃÈçͼ2ËùʾµÄµç·²â¶¨µçѹ±íÄÚ×裮
£¨1£©Óô˵ç·¿ÉÒÔ¾«È·²âÁ¿Ëù¸øÈý¿éµçѹ±íÖÐÄļ¸¿éµÄÄÚ×裿______£®
£¨2£©ÊµÑéÖУ¬Äã³ýÁËÒª¶Á³öµç×èÏäµÄ×èÖµR1Í⣬»¹ÐèÒª¶Á³ö______£¬ÓÃËù²âÊý¾Ý±íʾ´ý²âµçѹ±íÄÚ×èµÄ¼ÆË㹫ʽÊÇ______£®£¨Ð´³öÄܲâµÄËùÓеçѹ±íÄÚ×蹫ʽ£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2011Äê4ÔÂÀí¿Æ×ÛºÏÎïÀíʵÑéÊÔ¾í£¨¶þ£©£¨½âÎö°æ£© ÌâÐÍ£º½â´ðÌâ

I£®ÎªÁË̽¾¿¼ÓËÙ¶ÈÓëÁ¦µÄ¹Øϵ£¬Ê¹ÓÃÈçͼ1ËùʾµÄÆøµæµ¼¹ì×°ÖýøÐÐʵÑ飮ÆäÖÐG1£®G2ΪÁ½¸ö¹âµçÃÅ£¬ËüÃÇÓëÊý×Ö¼ÆʱÆ÷ÏàÁ¬£¬µ±»¬ÐÐÆ÷ͨ¹ýGl£®G2¹âµçÃÅʱ£¬¹âÊø±»ÕÚµ²µÄʱ¼ä¡÷t1£®¡÷t2¶¼¿ÉÒÔ±»²âÁ¿²¢¼Ç¼£®»¬ÐÐÆ÷Á¬Í¬ÉÏÃæ¹Ì¶¨µÄÒ»ÌõÐε²¹âƬµÄ×ÜÖÊÁ¿ÎªM£¬µ²¹âƬ¿í¶ÈΪD£¬¹âµçÃżä¾àÀëΪs£¬Ç£ÒýíÀÂëµÄÖÊÁ¿Îªm£®»Ø´ðÏÂÁÐÎÊÌ⣺
£¨1£©ÊµÑ鿪ʼӦÏȵ÷½ÚÆøµæµ¼¹ìÏÂÃæµÄÂݶ¤£¬Ê¹Æøµæµ¼¹ìˮƽ£¬ÔÚ²»Ôö¼ÓÆäËüÒÇÆ÷µÄÇé¿öÏ£¬ÈçºÎÅж¨µ÷½ÚÊÇ·ñµ½Î»£¿´ð£º______£®
£¨2£©ÈôÈ¡M=0.4kg£¬¸Ä±ämµÄÖµ£¬½øÐжà´ÎʵÑ飬ÒÔÏÂmµÄÈ¡Öµ²»ºÏÊʵÄÒ»¸öÊÇ______£®
A£®m1=5g    B£® m2=15g
C£®m3=40g    D£®m4=400g
£¨3£©ÔÚ´ËʵÑéÖУ¬ÐèÒª²âµÃÿһ¸öÇ£ÒýÁ¦¶ÔÓ¦µÄ¼ÓËٶȣ¬ÆäÖÐÇóµÃµÄ¼ÓËٶȵıí´ïʽΪ£º
______ 2S(
1
¡÷t22
-
1
¡÷t21
)

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸