9£®Ò»³¡´óÑ©¹ýºó£¬¼¸¸öͬѧ¾ÛÔÚÒ»Æð²âÁ¿½µÑ©×ÜÁ¿£®ËûÃÇ×¼±¸ÁË´óÅè¡¢ËÜÁÏͰ¡¢óÔÖã¡¢¼Ç¼±¾¡¢Èí³ßµÈ¹¤¾ß£®ÔÚÀÏʦµÄ°ïÖúÏ£¬Í¬Ñ§ÃǺܿì²âÁ¿³öѧµÄºñ¶ÈΪ0.16m£¬ËûÃÇÁ¿ÁËÒ»Ã×¼û·½ÇøÓò£¬È»ºó°Ñѩװ½øÁË´óÅ裬¾­¹ý³ÆÖØ£¬·¢ÏÖÑ©µÄÖØÁ¿Ô¼4¹«½ï£®£¨1Ã×¼û·½¾ÍÊÇÒÔ1Ã×Ϊ±ß³¤µÄÕý·½ÐÎÃæ»ý£¬g=10N/kg£©
£¨1£©ÈôijÊеÄ×ÜÃæ»ýΪ16800km2£¬Ôò´Ë´Î½µÂäÔڸõØÇøµÄÑ©µÄÖÊÁ¿ÊǶàÉÙ¶Ö£¿
£¨2£©Çë¹ÀËã»ýÑ©µÄƽ¾ùÃܶȣ®
£¨3£©Çë¹ÀËã»ýÑ©¶ÔµØÃæµÄѹǿ£®

·ÖÎö £¨1£©¸ù¾Ý1Ã×¼û·½Ñ©µÄÖÊÁ¿Çó³ö×ÜÖÊÁ¿£»
£¨2£©¸ù¾Ý¹«Ê½¦Ñ=$\frac{m}{V}$Ëã³öÑ©µÄÃܶȣ»
£¨3£©Çó³öÊÜÁ¦Ãæ»ý£¬ÀûÓÃp=$\frac{F}{S}$Çó³öѹǿ£®

½â´ð ½â£º£¨1£©Ñ©µÄÃæ»ýS=16800km2=1.68¡Á1010m2£»
Ñ©µÄÖÊÁ¿m×Ü=4kg/m2¡Á1.68¡Á1010m2=6.72¡Á1010kg=6.72¡Á107t£»
£¨2£©1Ã×¼û·½Ñ©µÄÌå»ýV=1m¡Á1m¡Á0.16m=0.16m3£¬
ÔòÑ©µÄÃܶȦÑ=$\frac{m}{V}$=$\frac{4kg}{0.16{m}^{3}}$=25kg/m3£»
£¨3£©1Ã×¼û·½Ñ©µÄ¶ÔµØÃæµÄѹÁ¦F=G=mg=4kg¡Á10N/kg=40N£¬
S=1m¡Á1m=1m2£¬
ѹǿp=$\frac{F}{S}$=$\frac{40N}{1{m}^{2}}$=40Pa£®
´ð£º£¨1£©´Ë´Î½µÂäÔڸõØÇøµÄÑ©µÄÖÊÁ¿ÊÇ6.72¡Á107t£®
£¨2£©Çë¹ÀËã»ýÑ©µÄƽ¾ùÃܶÈΪ25kg/m3£®
£¨3£©Çë¹ÀËã»ýÑ©¶ÔµØÃæµÄѹǿΪ40Pa£®

µãÆÀ ±¾Ì⿼²éÃܶȹ«Ê½ºÍѹǿ¹«Ê½µÄÓ¦Ó㬹ؼüÊÇÄÜÀí½â±¾ÌâÖÐ1Ã×¼û·½µÄÒâÒ壬¾Ý´Ë¿ÉÇóÑ©µÄÌå»ý£®

Á·Ï°²áϵÁдð°¸
Ïà¹ØÏ°Ìâ

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

19£®¡°Ã×Ïß¡°ÊÇÒ»ÖÖÌØÉ«Ð¡³Ô£®¶ËÉϲÍ×ÀµÄÓУºÒ»ÍëÈÈÌÀ£¬ÉÏÃæ¸¡×ÅÒ»²ãÓÍ£»Ò»µúÇгɱ¡Æ¬µÄÏÊÈ⣻һÍëÒÑÖóÊìµÄÃ×Ïߣ®Ê³¿ÍÏȰÑÈâÆ¬·Å½øÌÀÄÚ£¬ÉÔºòÔÙ¼ÓÈëÃ×Ïߣ®ÏÖÓÐÒÔÏÂ×ÊÁÏ£ºÌÀµÄ³õÎÂ95¡æ£¬±ÈÈÈÈÝ4.2¡Á103J/£¨kg•¡æ£©£»ÈâÆ¬µÄÖÊÁ¿Îª0.2kg£¬³õÎÂ25¡æ£¬±ÈÈÈÈÝ3.5¡Ál03J/£¨kg•¡æ£©£®»ùÓÚ½¡¿µÔµ¹Ê£¬½«È«²¿ÈâÆ¬µ¹ÈëÌÀÄÚ£¬ÈÈÆ½ºâºóζÈÖÁÉÙ´ïµ½85¡æ£¨ÏòÍâ½çÉ¢ÈȺöÂÔ²»¼Æ£©£®ÎÊ£º
£¨1£©ÍëÖÐÓͲãµÄÖ÷Òª×÷ÓÃÊÇʲô£¿
£¨2£©ÎªÊµÏÖÉÏÊöµÄζÈÒªÇó£¬ÀíÂÛÉϼÆËãÍëÖÐÌÀµÄÖÊÁ¿ÊǶàÉÙ£¿

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ

20£®µ¥¸×Ëijå³ÌÆûÓÍ»úµÄÒ»¸ö¹¤×÷Ñ­»·ÖжÔÍâ×ö¹¦1´Î£¬·ÉÂÖתËÙÊÇ1200r/min£¬¸ÃÆûÓÍ»úÿÃëÖÓÄÚÍê³É40¸ö³å³Ì£¬ÔÚ×ö¹¦³å³ÌÖУ¬ÆøÌåµÄζȽµµÍ£¬ÕâÊÇͨ¹ý×ö¹¦µÄ·½Ê½¼õÉÙÄÚÄÜ£®ÎªÁ˲»ÈÃÆûÓÍ»úÔÚ¹¤×÷ʱζÈÉýµÃÌ«¸ß£¬ÔÚÉè¼ÆÖÆÔìʱ£¬Æû¸×ÍâÓÐÒ»¸öË®Ì×£¬ÈÃÆû¸×±»Ë®°üΧ×Å£¬ÕâÊÇͨ¹ýÈÈ´«µÝµÄ·½Ê½¼õÉÙÆû¸×ÄÚÄÜ£®ÓÃË®À´ÀäÈ´Æû¸×ÊÇÒòΪˮµÄ±ÈÈÈÈݽϴó£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£º½â´ðÌâ

17£®ÈçͼËùʾΪ¡±Ì½¾¿Í¹Í¸¾µ³ÉÏñ¹æÂÉ¡±µÄʵÑ飮

£¨1£©ÊµÑéÖУ¬ÎªÁ˱ãÓÚ²âÁ¿Îï¾àºÍÏñ¾à£¬²¢ÇÒ³ÉÏñÔÚ¹âÆÁµÄÖÐÐÄλÖã¬Í¹Í¸¾µ¡¢¹âÆÁµÄÖÐÐĸúÖòÑæµÄÖÐÐÄÓ¦´óÖÂÔÚͬһ¸ß¶È£®
£¨2£©ÔÚͼ¼×ÖУ¬¹âÆÁÖÐÐijÊÏÖÁËÇåÎúµÄÖòÑæÏñ£¬Ëù³ÉµÄÖòÑæÏñÓ¦¸ÃÊÇͼÒÒÖеÄͼa£®
£¨3£©ÔÙ½«À¯ÖòÏò͹͸¾µ¿¿½üһЩ£¬Òª»ñµÃÇåÎúµÄʵÏñ£¬¹âÆÁÓ¦Ô¶À루ѡÌî¡°¿¿½ü¡±»ò¡°Ô¶À롱£©Í¹Í¸¾µ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ

4£®2013Äê12ÔÂ14ÈÕ21ʱ11·Ö£¬ÎÒ¹ú·¢ÉäµÄ£º¡°æÏ¶ðÈýºÅ¡±ÔÚÔÂÇò³É¹¦ÊµÊ©Èí׎£¬½«À´ÎÒ¹úµÄº½ÌìÔ±Ò²½«µÇÉÏÔÂÇò£¬ÔÚÔÂÁÁÉϽøÐпÆÑ§¿¼²ìµÄº½ÌìÔ±Ò²ÄÜ¿´µ½ÔÂÁÁÉϵġ°ÈÕʳ¡±£¬ÈÕʳÊÇÓÉÓÚ¹âÑØÖ±Ïß´«²¥Ôì³ÉµÄ£¬µ±º½ÌìÔ±ÔÚÔÂÇòÉÏ¿´µ½ÔÂÁÁÉϵġ°ÈÕʳ¡±Ê±£¬µØÇòÉϵÄÈ˺ÜÓпÉÄÜ¿´µ½¡°µØÇòÉÏ¡±µÄÔÂʳ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

14£®Èçͼ£¬Ò»¸ùÖʵؾùÔȵÄľ¸Ë¿ÉÈÆOµã×ÔÓÉת¶¯£¬ÔÚľ¸ËµÄÓÒ¶ËÊ©¼ÓÒ»¸öʼÖÕ´¹Ö±Óڸ˵Ä×÷ÓÃÁ¦F£¬Ê¹¸Ë´ÓOAλÖÃÔÈËÙתµ½OBλÖõĹý³ÌÖУ¬Á¦FµÄ´óС½«£¨¡¡¡¡£©
A£®Ò»Ö±±ä´óB£®±£³Ö²»±äC£®Ïȱä´ó£¬ºó±äСD£®ÏȱäС£¬ºó±ä´ó

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

1£®ÈçͼËùʾ£¬½«¼×¡¢ÒÒÁ½¸öÈÝÆ÷·ÅÔÚˮƽ×ÀÃæÉÏ£¬¼×¡¢ÒÒÁ½ÈÝÆ÷µÄµ×Ãæ»ý·Ö±ðΪS¼×ºÍSÒÒ£®¼×ÈÝÆ÷ÖÐÊ¢ÓÐÃܶÈΪ¦Ñ1µÄÒºÌ壬ÒÒÈÝÆ÷ÖÐÊ¢ÓÐÃܶÈΪ¦Ñ2µÄÒºÌ壮ÏÖ½«Ìå»ýÏàµÈµÄA¡¢BÁ½¸öÎïÌå·Ö±ð·ÅÈë¼×¡¢ÒÒÁ½ÈÝÆ÷ºó£¬ÎïÌåAÐü¸¡£¬ÎïÌåBƯ¸¡ÇÒÓÐÒ»°ëÌå»ý¶³öÒºÃæ£¬´ËʱÁ½ÈÝÆ÷ÖÐÒºÃæÏàÆ½£®ÒºÌå¶Ô¼×ÈÝÆ÷µ×²¿µÄѹǿΪp1¡¢Ñ¹Á¦ÎªF1£¬ÒºÌå¶ÔÒÒÈÝÆ÷µ×²¿µÄѹǿΪp2¡¢Ñ¹Á¦ÎªF2£®ÒÑÖªÎïÌåAÓëÎïÌåBµÄÃܶÈÖ®±ÈΪ2£º3£¬SÒÒµÈÓÚ4S¼×£®Ôò£¨¡¡¡¡£©
A£®pl=p2£¬F1£¾F2B£®3p1=p2£¬6Fl=F2C£®p1£¼p2£¬12F1=F2D£®p1£¾p2£¬F1=4F2

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ

18£®ÈçͼËùʾΪСÃ÷ʹÓû¬°å³µÑØË®Æ½·½ÏòÔ˶¯µÄÇé¾°£¬µ±Ð¡Ã÷Õ¾ÔÚ»¬°å³µÉÏʱ£¬´ÓÁ¦Ñ§µÄ½Ç¶ÈÌá³öÒ»¸öÎÊÌâ²¢»Ø´ð£º
ÎÊÌ⣺ÏòºóµÅµØ£¬»¬°å³µÎªÊ²Ã´ÏòǰÔ˶¯£¿£¿»Ø´ðÁ¦µÄ×÷ÓÃÊÇÏ໥µÄ£®

²é¿´´ð°¸ºÍ½âÎö>>

¿ÆÄ¿£º³õÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ

19£®ÓÃÀ´±íʾѹÁ¦µÄ×÷ÓÃЧ¹ûµÄÎïÀíÁ¿ÊÇ£¨¡¡¡¡£©
A£®Ñ¹Á¦B£®±äÐÎÁ¿C£®µ¯Á¦D£®Ñ¹Ç¿

²é¿´´ð°¸ºÍ½âÎö>>

ͬ²½Á·Ï°²á´ð°¸