ÌâÄ¿ÄÚÈÝ
15£®ÔÚ×ö¡°Ñо¿ÔȱäËÙÖ±ÏßÔ˶¯¡±µÄʵÑéʱ£¬Ä³Í¬Ñ§µÃµ½Ò»ÌõÓôòµã¼ÆʱÆ÷´òϵÄÖ½´ø£¬Èçͼ1Ëùʾ£¬²¢ÔÚÆäÉÏÈ¡ÁËA¡¢B¡¢C¡¢D¡¢E¡¢FµÈ6¸ö¼ÆÊýµã£¨Ã¿ÏàÁÚÁ½¸ö¼ÆÊýµã¼ä»¹ÓÐ4¸ö´òµã¼ÆʱÆ÷´òϵĵ㣬±¾Í¼ÖÐûÓл³ö£©£¬´òµã¼ÆʱÆ÷½ÓµÄÊÇ¡°220V¡¢50Hz¡±µÄ½»±äµçÁ÷£®Èçͼ1£¬Ëû½«Ò»°ÑºÁÃ׿̶ȳ߷ÅÔÚÖ½´øÉÏ£¬ÆäÁã¿Ì¶ÈºÍ¼ÆÊýµãA¶ÔÆ룮£¨1£©CEÖ®¼äµÄ¾àÀë4.10cm£®
£¨2£©ÀûÓôòµã¼ÆʱÆ÷´ò³öµÄÖ½´øÇóµÃÖ½´øÉÏB¡¢C¡¢E¸÷µãµÄ˲ʱËÙ¶ÈÈçÏÂ±í£¬ÇëÄã¼ÆËã³öDµãµÄ˲ʱËٶȣ¬²¢ÌîÔÚÏÂÃæµÄ±í¸ñÖУ®
vB | vC | vD | vE |
0.12m/s | 0.16m/s | 0.21m/s | 0.25m/s |
£¨4£©¸ù¾Ý£¨2£©±í¸ñÖеÄÊý¾Ý£¬ÊÔÔÚͼ2ÖÐËù¸øµÄ×ø±êϵÖУ¬»³öv-tͼÏ󣬲¢´ÓÖпɵóöÎïÌåµÄ¼ÓËÙ¶Èa=0.40m/s2£®
·ÖÎö £¨1£©³¤¶ÈµÄ¶ÁÊý£¬×¢Òâ±£Áô¹À¼ÆÖµ£»
£¨2£©¶ÁÊý×¢ÒâÓÐЧÊý×ֵı£Áô£»
£¨3£©¸ù¾ÝT=$\frac{1}{f}$£¬½áºÏËٶȹ«Ê½£¬¼´¿ÉÇó½â£»
£¨4£©½«±í¸ñÖÐÊý¾ÝÓÃÃèµã·¨»µ½×ø±êÖУ¬Á¬³ÉÖ±Ïß¼´¿É£¬¸ù¾ÝбÂÊÇó³ö¼ÓËٶȣ»¼´a=$\frac{¡÷v}{¡÷t}$½øÐзÖÎö£®
½â´ð ½â£º£¨1£©CEÖ®¼äµÄ¾àÀë4.10cm£»
£¨2£©¸ù¾Ý¿Ì¶È³ß½øÐжÈÊý£¬×¢Òâ×îС·Ö¶ÈΪ1mm£¬Òª¹À¶Áµ½×îС·Ö¶ÈÖµµÄÏÂһ룬ACÁ½µã¼ä¾àΪ2.48cm£¬¼°AEÁ½µã¼ä¾àΪ6.58cm£¬
ÓУºvD=$\frac{{x}_{CE}}{{t}_{CE}}$=$\frac{0.041}{2¡Á0.1}$=0.21m/s
£¨3£©Èç¹ûµ±Ê±µçÍøÖн»±äµçÁ÷µÄƵÂÊÊÇf¡ä=49Hz£¬¸ù¾Ý¹«Ê½£ºT=$\frac{1}{f}$£¬Ôòʵ¼Êʱ¼ä±ä´ó£¬Ê¹ËٶȵIJâÁ¿Öµ±Èʵ¼Êֵƫ´ó£®
£¨4£©ÈçͼËùʾ£¬
ͼÏóµÄбÂʱíʾ¼ÓËٶȣ¬ÓУºa=$\frac{0.16-0.1}{0.2-0.05}$=0.40m/s2
¹Ê´ð°¸Îª£º£¨1£©4.10£»
£¨2£©0.21£»
£¨3£©Æ«´ó£»
£¨4£©0.40£¨0.40¡«0.43£©£®ÈçÓÒͼËùʾ
µãÆÀ ´ËÌ⿼²éÔȱäËÙÖ±ÏßÔ˶¯µÄ¹æÂÉÑо¿£¬×¢Òâ¶ÁÊýÓÐЧÊý×Ö£¬»Í¼Ê¹¾¡¿ÉÄܶàµÄµãÂäÔÚ×ø±êÖáÉÏ£®
A£® | ·É´¬ÔÚAµãµã»ð±ä¹ìÇ°ºóÏà±È½Ï£¬±ä¹ìºó¶¯ÄܼõС | |
B£® | ·É´¬ÔÚ¢ò¹ìµÀÉÏÓÉAµãÔ˶¯µ½BµãµÄ¹ý³ÌÖУ¬¶¯ÄܼõС | |
C£® | ·É´¬ÔÚ¹ìµÀ¢ó¸ú¹ìµÀ¢ñµÄÏßËٶȴóС֮±ÈΪ1£º2 | |
D£® | ·É´¬ÔÚ¹ìµÀ¢ñÈÆÔÂÇòÔ˶¯Ò»ÖÜËùÐèµÄʱ¼äΪ2¦Ð$\sqrt{\frac{27R}{{g}_{0}}}$ |
A£® | µÚ1ÃëÄ©£¬ÎïÌåËٶȷ½Ïò¸Ä±ä | B£® | Ç°Á½ÃëÄÚÎïÌåµÄλÒÆΪÁã | ||
C£® | ÎïÌå×öÍù¸´Ô˶¯ | D£® | µÚ3ÃëÄ©ºÍµÚ5ÃëÄ©ÎïÌåµÄλÖÃÏàͬ |
A£® | Ôö´ó | B£® | ¼õÉÙ | ||
C£® | ²»±ä | D£® | Ìõ¼þ²»×㣬²»ÄÜÅж¨ |
A£® | µç³¡Ç¿¶ÈÓëÊÔ̽µçºÉÎÞ¹Ø | |
B£® | ÓÉE=$\frac{U}{d}$£¬Á½µã¼ä¾àÀëÔ½´óµç³¡Ç¿¶ÈԽС | |
C£® | ÓÉE=$\frac{F}{q}$£¬µç³¡Ç¿¶ÈEÓëq³É·´±ÈÓëF³ÉÕý±È | |
D£® | ÓÉU=$\frac{W}{q}$£¬µç³¡Á¦×ö¹¦WÔ½¶à£¬Á½µã¼äµÄµçÊƲîUÔ½´ó |
A£® | Èô½«a½ÓµçÔ´Õý¼«£¬b½Ó¸º¼«Ê±£¬µ¯»É³ÓµÄʾÊý¼õС | |
B£® | Èô½«a½ÓÕý¼«£¬b½Ó¸º¼«Ê±£¬µ¯»É³ÓµÄʾÊýÔö´ó | |
C£® | Èô½«b½ÓÕý¼«£¬a½Ó¸º¼«Ê±£¬µ¯»É³ÓµÄʾÊý²»±ä | |
D£® | Èô½«b½ÓÕý¼«£¬a½Ó¸º¼«Ê±£¬µ¯»É³ÓµÄʾÊý¼õС |