·ÖÎö ±¾Ìâ¢Ù¸ù¾Ý´ý²âµç×èÂú×ã$\frac{{R}_{V}^{\;}}{{R}_{x}^{\;}}£¾\frac{{R}_{x}^{\;}}{{R}_{A}^{\;}}$¿ÉÖªµçÁ÷±íÓ¦ÓÃÍâ½Ó·¨£¬È»ºóÔÙ¸ù¾ÝÅ·Ä·¶¨ÂÉ¿ÉÖª²âÁ¿ÖµÆ«Ð¡£»Ìâ¢Ú¸ù¾Ý´®²¢Áª¹æÂÉÁгöÁ½ÖÖÇé¿öϵıí´ïʽ£¬È»ºó½â³ö´ý²âµç×è×èÖµ¼´¿É£®
½â´ð ½â£º¢Ù¡¢ÓÉÓÚ´ý²âµç×èÂú×ã$\frac{{R}_{V}^{\;}}{{R}_{x}^{\;}}£¾\frac{{R}_{x}^{\;}}{{R}_{A}^{\;}}$£¬ËùÒÔµçÁ÷±íÓ¦ÓÃÍâ½Ó·¨£¬¹Ê²ÉÓü×ͼʱÎó²î½ÏС£»¸ù¾ÝÅ·Ä·¶¨ÂɲâÁ¿µÄÊÇ´ý²âµç×èÓëµçѹ±íµÄ²¢Áªµç×裬ËùÒÔ²âÁ¿ÖµÆ«Ð¡£»
¢Ú¡¢µ±${s}_{2}^{\;}$½Ó´¥Í·2ʱ£¬µçѹ±í²âÁ¿µÄÊÇRx¡¢RA¡¢RpµÄ×ܵçѹ£¬Ó¦ÓУº${U}_{1}^{\;}$=${I}_{1}^{\;}{£¨R}_{x}^{\;}{+R}_{A}^{\;}{+R}_{p}^{\;}£©$
µ±${s}_{2}^{\;}$½Ó´¥Í·1ʱ£¬µçѹ±í²âÁ¿µÄÊÇRA¡¢RpµÄ×ܵçѹ£¬Ó¦ÓУº${U}_{2}^{\;}$=${I}_{2}^{\;}$£¨${R}_{A}^{\;}$${+R}_{p}^{\;}$£©£¬
ÁªÁ¢ÒÔÉÏÁ½Ê½½âµÃ${R}_{x}^{\;}$=$\frac{{{I}_{2}^{\;}U}_{1}^{\;}-{{I}_{1}^{\;}U}_{2}^{\;}}{{{I}_{1}^{\;}I}_{2}^{\;}}$
¹Ê´ð°¸Îª£º¢Ù¼×ͼ£¬Æ«Ð¡£»¢Ú$\frac{{{I}_{2}^{\;}U}_{1}^{\;}-{{I}_{1}^{\;}U}_{2}^{\;}}{{{I}_{1}^{\;}I}_{2}^{\;}}$
µãÆÀ µ±´ý²âµç×èÂú×ã$\frac{{R}_{V}^{\;}}{{R}_{x}^{\;}}£¾\frac{{R}_{x}^{\;}}{{R}_{A}^{\;}}$ʱ£¬µçÁ÷±íÓ¦ÓÃÍâ½Ó·¨£¬´Ëʱ²âÁ¿ÖµÆ«Ð¡£¬µ±Âú×ã$\frac{{R}_{V}^{\;}}{{R}_{x}^{\;}}£¼\frac{{R}_{x}^{\;}}{{R}_{A}^{\;}}$ʱ£¬µçÁ÷±íÓ¦ÓÃÄÚ½Ó·¨£¬´Ëʱ²âÁ¿ÖµÆ«´ó£®
| Äê¼¶ | ¸ßÖÐ¿Î³Ì | Äê¼¶ | ³õÖÐ¿Î³Ì |
| ¸ßÒ» | ¸ßÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÒ» | ³õÒ»Ãâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ß¶þ | ¸ß¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õ¶þ | ³õ¶þÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
| ¸ßÈý | ¸ßÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ | ³õÈý | ³õÈýÃâ·Ñ¿Î³ÌÍÆ¼ö£¡ |
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2017½ìÎ÷²Ø×ÔÖÎÇøÀÈøÖÐѧ¸ßÈýÉÏѧÆÚµÚ¶þ´ÎÔ¿¼ÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£ºÑ¡ÔñÌâ
ÈçͼËùʾ£¬AºÍBÁ½Îï¿éµÄ½Ó´¥ÃæÊÇˮƽµÄ£¬AÓëB±£³ÖÏà¶Ô¾²Ö¹Ò»ÆðÑØ¹Ì¶¨Ð±ÃæÔÈËÙÏ»¬Ï»¬¹ý³ÌÖÐAµÄÊÜÁ¦¸öÊýΪ£¨ £©
![]()
A£®1¸ö B£®2¸ö C£®3¸ö D£®4¸ö
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º2016-2017ѧÄêн®¹þÃܵØÇø¶þÖи߶þÉÏÆÚÖп¼ÎïÀíÊÔ¾í£¨½âÎö°æ£© ÌâÐÍ£º¼ÆËãÌâ
Èçͼ¼×Ëùʾ£¬ÔÚxOy×ø±êϵÖУ¬Á½Æ½ÐнðÊô°åÈçͼ·ÅÖã¬ODÓëxÖáÖØºÏ£¬°åµÄ×ó¶ËÓëÔµãOÖØºÏ£¬°å³¤L£½2 m£¬°å¼ä¾àÀëd£½1 m£¬½ô¿¿¼«°åÓÒ²àÓÐÒ»Ó«¹âÆÁ£®Á½½ðÊô°å¼äµçѹUAOËæÊ±¼äµÄ±ä»¯¹æÂÉÈçͼÒÒËùʾ£¬ÒÑÖªU0£½1¡Á103 V£¬±ä»¯ÖÜÆÚT£½2¡Á10£3 s£¬t£½0ʱ¿ÌÒ»´øÕýµçµÄÁ£×Ó´Ó×óÉϽÇAµã£¬ÒÔv0£½1¡Á103 m/sµÄËÙ¶ÈÆ½ÐÐÓÚAB±ßÉäÈë°å¼ä£¬Á£×ÓµçºÉÁ¿q£½1¡Á10£5 C£¬ÖÊÁ¿m£½1¡Á10£7 kg£¬²»¼ÆÁ£×ÓËùÊÜÖØÁ¦£¬Çó£º
![]()
£¨1£©Á£×ÓÔÚ°å¼äÔ˶¯µÄʱ¼ä£»
£¨2£©Á£×Ó´òÔÚÓ«¹âÆÁÉϵÄ×Ý×ø±ê£»
£¨3£©Á£×Ó´òµ½ÆÁÉϵ͝ÄÜ£®
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | Óɹ«Ê½E=$\frac{F}{q}$¿ÉÖªEÓëF³ÉÕý±È£¬Óëq³É·´±È | |
| B£® | Óɹ«Ê½U=Ed¿ÉÖª£¬ÔÚÔÈÇ¿µç³¡ÖУ¬ÈÎÒâÁ½µã¼äµÄµçÊÆ²îÓëÕâÁ½µã¼äµÄ¾àÀë³ÉÕý±È | |
| C£® | µç³¡Ç¿¶ÈΪÁã´¦£¬µçÊÆ²»Ò»¶¨ÎªÁã | |
| D£® | ÎÞÂÛÊÇÕýµçºÉ»¹ÊǸºµçºÉ£¬µ±ËüÔڵ糡ÖÐÒÆ¶¯Ê±£¬Èôµç³¡Á¦×öÕý¹¦£¬ËüÒ»¶¨ÊÇ´ÓµçÊÆ¸ß´¦ÒƵ½µçÊÆµÍ´¦£¬²¢ÇÒËüµÄµçÊÆÄÜÒ»¶¨¼õÉÙ |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | СÎïÌåϽµÖÁ¸ß¶Èh3ʱ£¬µ¯»ÉÐαäÁ¿Îª0 | |
| B£® | СÎïÌåÏÂÂäÖÁ¸ß¶Èh5ʱ£¬¼ÓËÙ¶ÈΪ0 | |
| C£® | СÎïÌå´Ó¸ß¶Èh2Ͻµµ½h4£¬µ¯»ÉµÄµ¯ÐÔÊÆÄÜÔö¼ÓÁË$\frac{{{m^2}{g^2}}}{k}$ | |
| D£® | СÎïÌå´Ó¸ß¶Èh1Ͻµµ½h5£¬µ¯»ÉµÄ×î´óµ¯ÐÔÊÆÄÜΪmg£¨h1-h5£© |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | 2¡Á104N | B£® | 2.4¡Á104N | C£® | 1.6¡Á104N | D£® | 2.6¡Á104N |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÌî¿ÕÌâ
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | ¼×ºÍÒҵĹßÐÔÒ»Ñù´ó | B£® | ¼×µÄ¹ßÐÔ±ÈÒҵĴó | ||
| C£® | ¼×µÄ¹ßÐÔ±ÈÒÒµÄС | D£® | ÎÞ·¨Åж¨ÄĸöÎïÌåµÄ¹ßÐÔ´ó |
²é¿´´ð°¸ºÍ½âÎö>>
¿ÆÄ¿£º¸ßÖÐÎïÀí À´Ô´£º ÌâÐÍ£ºÑ¡ÔñÌâ
| A£® | ÑØÖ½ÃæÄæÊ±Õëת¶¯ | B£® | ÑØÖ½ÃæÏòÓÒÆ½¶¯ | ||
| C£® | µ¼Ïßab²»¶¯ | D£® | a¶ËתÏòÖ½Àb¶ËתÏòÖ½Íâ |
²é¿´´ð°¸ºÍ½âÎö>>
¹ú¼ÊѧУÓÅÑ¡ - Á·Ï°²áÁбí - ÊÔÌâÁбí
ºþ±±Ê¡»¥ÁªÍøÎ¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨Æ½Ì¨ | ÍøÉÏÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | µçÐÅթƾٱ¨×¨Çø | ÉæÀúÊ·ÐéÎÞÖ÷ÒåÓк¦ÐÅÏ¢¾Ù±¨×¨Çø | ÉæÆóÇÖȨ¾Ù±¨×¨Çø
Î¥·¨ºÍ²»Á¼ÐÅÏ¢¾Ù±¨µç»°£º027-86699610 ¾Ù±¨ÓÊÏ䣺58377363@163.com