Question

6£®Ä³»î¶¯Ð¡×éÀûÓÃÈçͼ¼×ËùʾµÄ×°ÖÃÑéÖ¤»úеÄÜÊغ㶨ÂÉ£®¸ÖÇò×ÔÓÉÏÂÂä¹ý³ÌÖУ¬ÏȺóͨ¹ý¹âµçÃÅA¡¢B£¬¼ÆʱװÖòâ³ö¸ÖÇòͨ¹ýA¡¢BµÄʱ¼ä·Ö±ðΪt_A¡¢t_B£®ÊµÑéÖУ¬ÓøÖÇòͨ¹ý¹âµçÃŵÄƽ¾ùËٶȱíʾ¸ÖÇòÇòÐÄͨ¹ý¹âµçÃŵÄ˲ʱËٶȣ®²â³öÁ½¹âµçÃżäµÄ¾àÀëΪh£¬µ±µØµÄÖØÁ¦¼ÓËÙ¶ÈΪg£®
£¨1£©ÓÃÓα꿨³ß²âÁ¿¸ÖÇòµÄÖ±¾¶ÈçͼÒÒËùʾ£¬¸ÖÇòÖ±¾¶d=1.02cm£®
£¨2£©ÒªÑéÖ¤»úеÄÜÊغ㣬ֻҪ±È½ÏD£®
A£®d²£¨$\frac{1}{{{t}_{A}}^{2}}$-$\frac{1}{{{t}_{B}}^{2}}$£©ÓëghÊÇ·ñÏàµÈ   B£®d²£¨$\frac{1}{{{t}_{A}}^{2}}$-$\frac{1}{{{t}_{B}}^{2}}$£©Óë2ghÊÇ·ñÏàµÈ

C£®d²£¨$\frac{1}{{{t}_{B}}^{2}}$-$\frac{1}{{{t}_{A}}^{2}}$£©ÓëghÊÇ·ñÏàµÈ   D£®d²£¨$\frac{1}{{{t}_{B}}^{2}}$-$\frac{1}{{{t}_{A}}^{2}}$£©Óë2ghÊÇ·ñÏàµÈ£®
£¨3£©·ÖÎö¿ÉÖª£¬¸ÖÇòͨ¹ý¹âµçÃŵÄƽ¾ùËٶȣ¼£¨Ìî¡°£¾¡±¡°=¡±¡°£¼¡±£©¸ÖÇòÇòÐÄͨ¹ý¹âµçÃŵÄ˲ʱËٶȣ®

Answer 1

·ÖÎö £¨1£©½â¾ö±¾ÌâµÄ¹Ø¼üÕÆÎÕÓα꿨³ß¶ÁÊýµÄ·½·¨£¬Ö÷³ß¶ÁÊý¼ÓÉÏÓαê¶ÁÊý£¬²»Ðè¹À¶Á£®
£¨2£©ÀûÓÃСÇòͨ¹ý¹âµçÃŵÄƽ¾ùËÙ¶ÈÀ´´úÌæ˲ʱËٶȣ¬ÓÉ´Ë¿ÉÒÔÇó³öСÌúÇòͨ¹ý¹âµçÃÅʱµÄ˲ʱËٶȣ¬¸ù¾Ý»úеÄÜÊغãµÄ±í´ïʽ¿ÉÒÔÇó³öËùÒªÇóµÄ¹Øϵʽ£®
£¨3£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯µÄ¹æÂÉÅжÏÇó½â£®

½â´ð ½â£º£¨1£©Óα꿨³ßµÄÖ÷³ß¶ÁÊýΪ£º1.0cm£¬Óαê³ßÉϵÚ2¸ö¿Ì¶ÈºÍÖ÷³ßÉÏijһ¿Ì¶È¶ÔÆ룬Óαê¶ÁÊýΪ0.1¡Á2mm=0.2mm=0.02cm£¬
ËùÒÔ×îÖÕ¶ÁÊýΪ£º1.02cm£®
£¨2£©ÀûÓÃСÇòͨ¹ý¹âµçÃŵÄƽ¾ùËÙ¶ÈÀ´´úÌæ˲ʱËٶȣ¬¹Ê£ºv=$\frac{D}{t}$£¬
¸ù¾Ý»úеÄÜÊغãµÄ±í´ïʽÓУºmgh=$\frac{1}{2}$mD²£¨$\frac{1}{{t}_{B}^{2}}$-$\frac{1}{{t}_{A}^{2}}$£©
¼´Ö»Òª±È½ÏD²£¨$\frac{1}{{t}_{B}^{2}}$-$\frac{1}{{t}_{A}^{2}}$£©Óë2ghÊÇ·ñÏàµÈ£¬¹ÊDÕýÈ·£¬ABC´íÎó£®
£¨3£©¸ù¾ÝÔȱäËÙÖ±ÏßÔ˶¯µÄ¹æÂɵøÖÇòͨ¹ý¹âµçÃŵÄƽ¾ùËٶȵÈÓÚÕâ¸ö¹ý³ÌÖÐÖмäʱ¿ÌËٶȣ¬
ËùÒÔ¸ÖÇòͨ¹ý¹âµçÃŵÄƽ¾ùËٶȣ¼¸ÖÇòÇòÐÄͨ¹ý¹âµçÃŵÄ˲ʱËٶȣ¬
¹Ê´ð°¸Îª£º£¨1£©1.02£»
£¨2£©D£»
£¨3£©£¼£®

µãÆÀ ¶ÔÓÚ»ù±¾²âÁ¿ÒÇÆ÷ÈçÓα꿨³ß¡¢ÂÝÐý²â΢Æ÷µÈÒªÁ˽âÆäÔ­Àí£¬ÕýȷʹÓÃÕâЩ»ù±¾ÒÇÆ÷½øÐÐÓйزâÁ¿£®
ÎÞÂÛ²ÉÓÃʲôÑùµÄ·½·¨À´ÑéÖ¤»úеÄÜÊغ㣬Ã÷È·ÆäʵÑéÔ­Àí¶¼Êǽâ¾öÎÊÌâµÄ¹Ø¼ü£¬Í¬Ê±ÔÚ´¦ÀíÊý¾Ýʱ£¬ÒªÁé»îÓ¦ÓÃËùѧÔ˶¯Ñ§µÄ»ù±¾¹æÂÉ£®