£¨¹²20·Ö£©
£¨1£©£¨4·Ö£©Îª½â¾öÂ¥µÀµÄÕÕÃ÷£¬ÔÚÂ¥µÀÄÚ°²×°Ò»¸ö´«¸ÐÆ÷ÓëµçµÆ¿ØÖƵç·Ïà½Ó£¬µ±Â¥µÀÄÚÓÐÈË×߶¯¶ø·¢³öÉùÏìʱ£¬µçµÆ¼´±»½ÓͨµçÔ´¶ø·¢¹â£¬ÕâÖÖ´«¸ÐÆ÷ÊäÈëµÄÊÇ        Ðźţ¬¾­¹ý´«¸ÐÆ÷ת»»ºó£¬Êä³öµÄÊÇ         Ðźš£
£¨2£©£¨16·Ö£©Ä³Í¬Ñ§Éè¼ÆÁËÒ»¸ö²â¶¨»¬¿éÓëľ°åÎʶ¯Ä¦²ÁÒòÊýµÄʵÑé¡£×°ÖÃÈçͼ1Ëùʾ£¬       ÆäÖÐMΪ»¬¿é£¬mºÍm¡äÊÇÖÊÁ¿¿Éµ÷µÄƬÂ룬ϸÉþºÍ»¬ÂÖµÄÖÊÁ¿¶¼¿ÉÒÔºöÂÔ²»¼Æ¡£ÊµÑé¹ý³ÌÖУ¬¸ÃͬѧÔÚƬÂë×ÜÖÊÁ¿m+ m¡ä=m0±£³Ö²»±äµÄÌõ¼þÏ£¬¸Ä±ämºÍm¡äµÄ´óС£¬²â³ö²»Í¬£¬mÏÂϵͳµÄ¼ÓËٶȣ¬È»ºóͨ¹ýʵÑéÊý¾ÝµÄ·ÖÎö¾Í¿ÉÒÔÇó³ö»¬¿éºÍľ°å¼äµÄ¶¯Ä¦²ÁÒòÊý¡£

¢ÙÔÚʵÑéÆ÷²Ä·½Ã棬¸ÃͬѧѡÔñÁË´òµã¼ÆʱÆ÷¡¢Ã¿Æ¬ÖÊÁ¿Îª150gµÄƬÂë×ܹ²10Ƭ¡¢»¬ ¿é¡¢Ä¾°å¡¢»¬ÂÖ¸÷Ò»¸ö¡¢Ï¸ÏßÈô¸É¡££¬³ý´ËÒÔÍâ¸ù¾Ý±¾ÊµÑéËùÒª²âÁ¿µÄÎïÀíÁ¿£¬ÄãÈÏΪ³ýÁ˸ÃͬѧÒÑÑ¡ÔñµÄÒÇÆ÷ÒÔÍ⣬ÔÚÏÂÁб¸Ñ¡ÒÇÆ÷Öл¹ÐèÒª£º          (Ìîд×Öĸ´úºÅ¼´¿É)¡£
A£ºÃë±í    B£ººÁÃ׿̶ȳߠ        C£ºÑ§ÉúÓÃÖ±Á÷µçÔ´     D£ºÑ§ÉúÓý»Á÷µçÔ´
¢ÚÒÔÏÂÊÇΪÁ˲âÁ¿»¬¿éµÄ¼ÓËٶȣ¬ÓÉʵÑéµÃÀ´µÄÒ»ÌõÖ½´ø¡£´Ó±È½ÏÇåÎúµÄOµã¿ªÊ¼£¬¸ÃͬѧÿÊý5¸öµã×öΪһ¸öÖ­Êýµã£¬ËüÃÇ·Ö±ðΪ£ºA¡¢B¡¢C¡¢D¡¢E¡¢FµÈ£¬²âÁ¿³ö¸÷ÏàÁÚ ¼ÆÊýµãÖ®¼äµÄ¾àÀ룬Èçͼ2Ëùʾ¡£¸ù¾ÝÕâÌõÖ½´ø£¬Çó³öÕâ´ÎʵÑéʱ»¬¿éµÄ¼ÓËÙ¶ÈΪ£º
          m£¯s2(½á¹û±£Áôµ½Ð¡ÊýµãºóÁ½Î»)¡£

¢ÛÔÚʵÑéµÄÊý¾Ý´¦Àí¹ý³ÌÖУ¬¸ÃͬѧÒÔƬÂëmµÄÖÊÁ¿ÎªºáÖᣬÒÔϵͳµÄ¼ÓËÙ¶ÈaΪ×ÝÖᣬ»æÖÆÁËÈçÏÂͼ3ËùʾµÄʵÑéͼÏß¡£
ÀíÂÛºÍʵÑé¾ùÒÑÖ¤Ã÷£¬ÔÚ»¬¶¯µÄÌõ¼þÏ£¬aºÍmÊÇÒ»´Îº¯Êý¹Øϵ£¬¼´¿ÉÒÔд³É£º
            ¡£a=km+c£¨Ê½ÖеÄkºÍcΪ³£Êý£©µÄÐÎʽ¡£ÄÇô£¬±¾ÊµÑéÖеij£Êý¾ßÌå±í´ïʽÒòÊý¶Ç£ºk=             £¬c=        £»½áºÏ±¾ÊµÑéͼÏߵóöµÄ»¬¿éÓëľ°åÎʵĶ¯Ä¦²ÁÒòÊý¦Ì=           ¡£

£¨1£©ÉùÒô£¬µç
£¨2£©¢ÙB  D£»¢Ú0.81£»¢Û£¬£¬0.3
ÂÔ
Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

£¨1£©ÔÚ¡°ÑéÖ¤»úеÄÜÊغ㶨ÂÉ¡±µÄʵÑéÖУ¬ÏÂÁÐÐðÊöÕýÈ·µÄÊÇ£¨  £©
A£®°²×°´òµã¼ÆʱÆ÷ʱ£¬Á½Ö½´øÏÞλ¿×Ó¦ÔÚͬһÊúÖ±ÏßÉÏ
B£®ÊµÑéʱ£¬ÔÚËÉ¿ªÖ½´øÈÃÖØÎïÏÂÂäµÄͬʱ£¬Ó¦Á¢¼´½ÓͨµçÔ´
C£®ÈôÖ½´øÉÏ¿ªÍ·´ò³öµÄ¼¸µãÄ£ºý²»Ç壬Ҳ¿ÉÉè·¨ÓúóÃæÇåÎúµÄµã½øÐÐÑéÖ¤
D£®²âÁ¿ÖØÎïÏÂÂä¸ß¶È±ØÐë´ÓÆðʼµãËãÆð
£¨2£©Îª½øÐиÃʵÑ飬±¸ÓÐÏÂÁÐÆ÷²Ä¿É¹©Ñ¡ÔñÌú¼Ų̈¡¢´òµã¼ÆʱÆ÷¡¢¸´Ð´Ö½Æ¬¡¢ÖØ´¸¡¢Ö½´ø¡¢µÍѹֱÁ÷µçÔ´¡¢Ììƽ¡¢Ãë±í¡¢µ¼Ïß¡¢¿ª¹Ø¡£ÆäÖв»±ØÒªµÄÆ÷²ÄÊÇ                        ¡£È±ÉÙµÄÆ÷²ÄÊÇ                   ¡£

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

ÏÂͼÊÇijʵÑéС×éͬѧÀûÓôòµã¼ÆʱÆ÷£¬²âÁ¿Ä³Îï¿é×öÔȱäËÙÖ±ÏßÔ˶¯Ê±µÃµ½µÄÒ»ÌõÖ½´ø£¬È¡OµãΪt=0ʱ¿Ì¼Çʱµã£¬¸÷Á¬Ðøµã¼äµÄʱ¼ä¼ä¸ôΪ0.02s¡£

£¨1£©Í¼ÖÐa¡¢c¡¢eÈýµãµÄ¼ÆÊýÊÇ
xa=                        ¡¢xc=                  ¡¢xe=                ¡£
£¨2£©ËµÃ÷¸ÃÎïÌåÔ˶¯µÄ·½ÏòÓëÊܺÏÍâÁ¦·½ÏòµÄ¹Øϵ¡£
£¨3£©ÓÃa¡¢c¡¢eÈýµãµÄÊý¾Ý£¬¼ÆËã³öÎïÌåÔ˶¯µÄ¼ÓËٶȣ¨ÒªÇóд³ö¼ÆËã¹ý³Ì£©¡£

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

£¨19·Ö£©
£¨1£©ÏÂÁÐÓйظßÖÐÎïÀíʵÑéµÄÃèÊöÖУ¬ÕýÈ·µÄÊÇ£º               ¡£
A£®ÔÚ¡°ÑéÖ¤Á¦µÄƽÐÐËıßÐζ¨Ôò¡±µÄʵÑéÖУ¬À­ÏðƤ½îµÄϸÉþÒªÉÔ³¤£¬²¢ÇÒʵÑéʱҪʹµ¯»É²âÁ¦¼ÆÓëľ°åƽÃæƽÐУ¬ËÅʱ±£Ö¤µ¯»ÉµÄÖáÏßÓëϸÉþÔÚͬһֱÏßÉÏ£»
B£®ÔÚ¡°ÑéÖ¤¶¯Á¿Êغ㶨ÂÉ¡±ÊµÑéÖУ¬±»ÅöÇòµÄÖÊÁ¿Ó¦´óÓÚÈëÉäÇòµÄÖÊÁ¿£¬ÈëÉäÇòÿ´ÎÓ¦´Óͬһ¸ß¶ÈÎÞ³õËٶȻ¬Ï£»
C£®ÔÚ¡°Á·Ï°Ê¹ÓÃʾ²¨Æ÷¡±ÊµÑéÖУ¬ÔÚ¹Û²ìÓ«¹âÆÁÉϵÄÁÁ°ß²¢½øÐе÷½Úʱ£¬Ó¦Í¨¹ýµ÷½Ú¡°»Ô¶Èµ÷½ÚÐýÅ¥¡±¡¢¡°¾Û½¹ÐýÅ¥¡±ºÍ¡°¸¨Öú¾Û½¹ÐýÅ¥¡±£¬Ê¹ÁÁ°ß×îÔ²×îС£º
D£®ÔÚ¡°°ÑµçÁ÷±í¸ÄװΪµçѹ±í¡±ÊµÑéÖУ¬ÓÉÓÚϵͳÎó²îµÄÔ­Òò£¬ÓøÄ×°µÄµçѹ±íºÍ±ê×¼µçѹ±í²âÁ¿Í¬Ò»µçѹʱ£¬¸Ä×°µÄµçѹ±íʾÊý±È±ê×¼µçѹ±íʾÊýÆ«´ó£®
£¨2£©A¡¢B¶þͬѧʹÓÃÍêÈ«ÏàͬµÄÆ÷²ÄÓ÷ü°²·¨²âÁ¿µçÔ´µç¶¯ÊÆEÓëÄÚ×èr£¬¸ø¶¨µÄÆ÷²ÄΪ£º´ý²âµçÔ´£¬»¬¶¯±ä×èÆ÷£¬µçѹ±í£¨ÄÚ×èԼΪ3 k£©£¬µçÁ÷±í£¨ÄÚ×èԼΪ0.7£©£¬µç¼ü£¬µ¼ÏßÈô¸É£®¶þÈ˵IJâÁ¿½á¹û·Ö±ðÓÉͼAºÍͼB¸ø³ö£®

¢ÙÓÉͼA£¬EA =            V£¬ rA =            £»
ÓÉͼB£¬EB =            V£¬ rB =            £®£¨¾ùÈ¡2λÓÐЧÊý×Ö£©
¢ÚÔÚÐéÏß¿òÄڷֱ𻭳öA¡¢BËùÓõĵç·ͼ£®
 
 
 
AµÄµç·ͼ                      BµÄµç·ͼ
¢ÛÄãÈÏΪÄÄһλͬѧ¶ÔµçÔ´ÄÚ×èµÄ²âÁ¿½á¹û½ÏΪ׼ȷ         ?£¨ÌîA»òB£©

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£º¼ÆËãÌâ

( 1 )ͼÖÐÓα꿨³ß£¨Óαê³ßÉÏÓÐ50¸öµÈ·Ö¿Ì¶È£©¶ÁÊýΪ____________cm£»ÂÝÐý²â΢Æ÷µÄ¶ÁÊýΪ____________cm


£¨£²£©£®£¨£µ·Ö£©

1,3,5

 
ij̽¾¿Ñ§Ï°Ð¡×éµÄͬѧÊÔͼÒÔͼÖеĻ¬¿éΪ¶ÔÏóÑéÖ¤¡°¶¯Äܶ¨Àí¡±£¬ËûÃÇÔÚʵÑéÊÒ×é×°ÁËÈçͼËùʾµÄÒ»Ì××°Öã¬ÁíÍâËûÃÇ»¹ÕÒµ½ÁË´òµã¼ÆʱÆ÷ËùÓõÄѧÉúµçÔ´¡¢µ¼Ïß¡¢¸´Ð´Ö½¡¢Ð¡Ä¾¿é¡¢Ï¸É³£®µ±Á¬ÉÏÖ½´ø£¬ÊÍ·ÅɳͰʱ£¬»¬¿é´¦ÓÚ¾²Ö¹£®ÒªÍê³É¸ÃʵÑ飬ÄãÈÏΪ£º

¢Ù»¹ÐèÒªµÄʵÑéÆ÷²ÄÓР                               £®
¢ÚʵÑéʱÊ×ÏÈÒª×öµÄ²½ÖèÊÇ               £¬ÎªÁ˱£Ö¤»¬¿éÊܵ½µÄºÏÁ¦ÓëɳºÍɳͰµÄ×ÜÖØÁ¦´óС»ù±¾ÏàµÈ£¬É³ºÍɳͰµÄ×ÜÖÊÁ¿Ó¦Âú×ãµÄÌõ¼þÊÇ                       £®
¢ÛÔÚÉÏÊöµÄ»ù´¡ÉÏ£¬Ä³Í¬Ñ§²âµÃ»¬¿éµÄÖÊÁ¿M£®ÍùɳͰÖÐ×°ÈëÊÊÁ¿µÄϸɳ£¬²âµÃ´ËʱɳºÍɳͰµÄ×ÜÖÊÁ¿m£®½ÓͨµçÔ´£¬ÊÍ·ÅɳͰ£¬ÔÚ´òµã¼ÆʱÆ÷´ò³öµÄÖ½´øÉÏÈ¡Á½µã£¬²â³öÕâÁ½µãµÄ¼ä¾àLºÍÕâÁ½µãµÄËٶȴóСv1Óëv2£¨v1<v2£©£®Ôò¶Ô»¬¿é£¬±¾ÊµÑé×îÖÕÒªÑéÖ¤µÄÊýѧ±í´ïʽΪ                                                              £¨ÓÃÌâÖеÄ×Öĸ±íʾ£©                       £®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£º¼ÆËãÌâ

ijͬѧÀûÓõ¥°Ú²â¶¨µ±µØÖØÁ¦¼ÓËٶȣ¬·¢ÏÖµ¥°Ú¾²Ö¹Ê±°ÚÇòÖØÐÄÔÚÇòÐĵÄÕýÏ·½£¬ËûÈÔ½«´ÓÐüµãµ½ÇòÐĵľàÀëµ±×÷°Ú³¤L£¬Í¨¹ý¸Ä±ä°ÚÏߵij¤¶È£¬²âµÃ6×éLºÍ¶ÔÓ¦µÄÖÜÆÚT£¬»­³öLÒ»T2ͼÏߣ¬È»ºóÔÚͼÏßÉÏÑ¡È¡A¡¢BÁ½¸öµã£¬×ø±êÈçͼËùʾ¡£Ëû²ÉÓÃÇ¡µ±µÄÊý¾Ý´¦Àí·½·¨£¬Ôò¼ÆËãÖØÁ¦¼ÓËٶȵıí´ïʽӦΪg=              ¡£ÇëÄãÅжϸÃͬѧµÃµ½µÄʵÑé½á¹ûÓë°ÚÇòÖØÐľÍÔÚÇòÐÄ´¦µÄÇé¿öÏà±È£¬½«                ¡£(Ìî¡°Æ«´ó¡±¡¢¡°Æ«Ð¡¡±»ò¡°Ïàͬ¡±)   

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£º¼ÆËãÌâ

Ϊ²â¶¨Ä¾¿éÓëбÃæ¼äµÄ¶¯Ä¦²ÁÒòÊý£¬Ä³Í¬Ñ§ÈÃľ¿é´ÓбÃæÉ϶Ë×Ô¾²Ö¹Æð×öÔȼÓËÙÏ»¬Ô˶¯(ÈçͼËùʾ)£¬ËûʹÓõÄʵÑéÆ÷²Ä½öÏÞÓÚ£º¢ÙÇã½Ç¹Ì¶¨µÄбÃæ(Çã½Çδ֪)£»¢Úľ¿é£»¢ÛÃë±í£»¢ÜÃ׳ߣ®ÊµÑéÖÐÓ¦¼Ç¼µÄÊý¾ÝÊÇ________£¬¼ÆË㶯Ħ²ÁÒòÊýµÄ¹«Ê½ÊÇ=__________£¬ÎªÁ˼õС²âÁ¿µÄÎó²î£¬¿É²ÉÓõİ취ÊÇ___________________£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£º¼ÆËãÌâ

¡°Ñо¿ÔȱäËÙÖ±ÏßÔ˶¯¡±µÄʵÑéÖУ¬Ê¹Óõç´Åʽ´òµã¼ÆʱÆ÷(ËùÓý»Á÷µçµÄƵÂÊΪ50Hz)£¬µÃµ½Èçͼ8ËùʾµÄÖ½´ø¡£Í¼ÖеĵãΪ¼ÆÊýµã£¬ÏàÁÚÁ½¼ÆÊýµã¼ä»¹ÓÐËĸöµãδ»­³öÀ´£¬ÏÂÁбíÊöÕýÈ·µÄÊÇ
   
A£®ÊµÑéʱӦÏÈ·Å¿ªÖ½´øÔÙ½ÓͨµçÔ´
B£®(S6Ò»S1)µÈÓÚ(S2Ò»S1)µÄ6±¶
C£®´ÓÖ½´ø¿ÉÇó³ö¼ÆÊýµãB¶ÔÓ¦µÄËÙÂÊ
D£®ÏàÁÚÁ½¸ö¼ÆÊýµã¼äµÄʱ¼ä¼ä¸ôΪ0£®02s

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º²»Ïê ÌâÐÍ£ºÊµÑéÌâ

£¨6·Ö£©Ä³Í¬Ñ§ÔÚ¼ÒÀï×ö¡°Óõ¥°Ú²â¶¨ÖØÁ¦¼ÓËٶȡ°µÄʵÑ飬µ«Ã»ÓÐÊʺϵİÚÇò£¬ËûÕÒµ½ÁËÒ»¿é´óСΪ5cm×óÓÒ£¬ÍâÐβ»¹æÔòµÄ´óÀíʯ¿é´úÌæ°ÚÇò¡£ËûÉè¼ÆµÄʵÑé²½ÖèÊÇ£º
A£®½«Ê¯¿éÓÃϸÏßϵºÃ£¬½áµãΪ£¬½«Ï¸ÏßµÄÉ϶˹̶¨ÓÚµã
B£®½«Ê¯¿éÀ­¿ª£¬Ê¹°Ú½Ç´óԼΪ10¡ã×óÓÒ£¬È»ºóÓɾ²Ö¹ÊÍ·Å
C£®´Óʯ¿é°Úµ½Æ½ºâλÖÿªÊ¼¼Æʱ£¬²â³ö30´ÎÈ«Õñ¶¯µÄ×Üʱ¼ä£¬ÓɵóöÖÜÆÚ
D£®¸Ä±ä¼äϸÏߵij¤¶È£¬ÔÙ×ö¼¸´ÎʵÑ飬¼ÇÏÂÏàÓ¦µÄ¡­¡­
E£®Çó³ö¶à´ÎʵÑéÖвâµÃµÄLºÍTµÄƽ¾ùÖµ´úÈ빫ʽ£¬Çó³öÖØÁ¦¼ÓËÙ¶È
£¨1£©ÄãÈÏΪ¸ÃͬѧÒÔÉÏʵÑé²½ÖèÖÐÓÐÖØ´ó´íÎóµÄÊÇ____________(ÌîÐòºÅ)¡£
£¨2£©¸ÄÕý´íÎóºó£¬Èç¹ûÓÃͼÏóÀ´´¦Àí£¬¾ÍÄܽâ¾ö°Ú³¤ÎÞ·¨×¼È·²âÁ¿Ëù´øÀ´µÄÎó²î¡£ÏÂͼÖУ¬¸ù¾ÝÕýÈ·Êý¾ÝµÃµ½µÄͼÏóÊÇ__________£¨ÌîÐòºÅ£©¡£

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸