Question

16£®Ð¡¸ÕͬѧÔÚºÓÀïÊ°µ½Ò»¿é¾«ÃÀµÄʯͷ£¬ËûÏëÖªµÀÕâ¿éʯͷµÄÃܶȣ¬¾ÍÉè¼ÆÁ½ÖÖʵÑé·½°¸·Ö±ð½øÐÐÁ˲âÁ¿£®
·½°¸Ò»£ºÊµÑéÆ÷²Ä£ºÊ¯Í·¡¢Ï¸Ïß¡¢ÒçË®±­¡¢Ë®¡¢ÉÕ±­¡¢Ììƽ¡¢Á¿Í²
ʵÑé²½Ö裺
A£®ÔÚÒçË®±­ÖÐ×°ÂúË®£»
B£®ÓÃϸÏß˩סʯͷ£¬½þûÔÚÊ¢ÂúË®µÄÒçË®±­ÖУ¬ÓÃÉÕ±­½ÓסÒçË®±­ÖÐÒç³öµÄË®£»
C£®½«ÒçË®±­ÖеÄË®µ¹ÈëÁ¿Í²Öвâ³öÒç³öË®µÄÌå»ýV£»
D£®´ÓÒçË®±­ÖÐÈ¡³öʯͷֱ½Ó·ÅÔÚÒѵ÷ºÃµÄÌìƽÉϲâ³öÖÊÁ¿Îªm£»
E£®Ê¯Í·µÄÃܶÈΪ¦Ñ_ʯ=$\frac{m}{V}$£®
·½°¸¶þ£ºÊµÑéÆ÷²Ä£ºÊ¯Í·¡¢Ï¸Ïß¡¢Ë®¡¢ÉÕ±­¡¢µ¯»É²âÁ¦¼Æ
ʵÑé²½Ö裺
A£®ÓÃϸÏß˩סʯͷ£¬¹ÒÔÚ²âÁ¦¼ÆµÄ϶ˣ¬¶Á³ö²âÁ¦¼ÆµÄ¶ÁÊýΪG£»
B£®ÓòâÁ¦¼ÆÀ­×Åʯͷ£¬°Ñʯͷ½þûÔÚÉÕ±­ÖУ¬¶Á³ö²âÁ¦¼ÆµÄ¶ÁÊýΪF£»
C£®Ê¯Í·µÄÃܶÈΪ¦Ñ_ʯ=$\frac{G}{G-F}$¦Ñ_Ë®£®
С¸ÕÍê³ÉʵÑéºó·¢ÏÖ£¬Á½´ÎʵÑé²â³öʯͷÃܶÈÏà²îºÜ´ó£®ÇëÄã·ÖÎö£¬Ð¡¸ÕµÄ·½°¸Ò»´æÔÚ´íÎó£¬Ôì³É²âÁ¿ÖµÆ«´ó£¨Ñ¡Ìî¡°´ó¡±»ò¡°Ð¡¡±£©ÁË£¬Ô­ÒòÊÇÉÕ±­ÍùÁ¿Í²µ¹Ë®Ê±£¬ÉÕ±­ÖÐÓвÐÁôµÄË®»ò²âʯ¿éÖÊÁ¿Ê±Ê¯¿éÉÏÕ´ÓÐË®£®£¨´ð³öÒ»ÖÖ¼´¿É£©

Answer 1

·ÖÎö ·½°¸Ò»£º¸ù¾Ý°¢»ùÃ×µÂÔ­Àí£¬ÀûÓÃÒçË®±­¡¢Á¿Í²£¬ÒÑÖªÃܶȵÄË®£¬½øÐÐÊÔÑ飬ʵÑéµÄ¹Ø¼üÊÇ£¬²âÁ¿Ð¡Ê¯Í·µÄÌå»ý£¬¿É¸ù¾Ý¸¡Á¦ÖªÊ¶µÃ֪СʯͷµÄÌå»ýµÈÓÚÅÅ¿ªË®µÄÌå»ý£»
·½°¸¶þ£ºÖªµÀСʯ¿éµÄÖØÁ¦G£¬Ð¡Ê¯¿é½þûÔÚÒºÌåÖгƵÄʾÊýΪF£¬Ð¡Ê¯¿éÊܵ½µÄ¸¡Á¦Îª£ºF_¸¡=G-F£®
Сʯ¿é½þûÔÚË®ÖУ¬ÖªµÀСʯ¿éÊܵ½µÄ¸¡Á¦ºÍË®µÄÃܶȣ¬¸ù¾Ý°¢»ùÃ×µÂÔ­ÀíÇó³öСʯ¿éµÄÌå»ý£»ÖªµÀСʯ¿éµÄÖÊÁ¿ºÍÌå»ý£¬¸ù¾ÝÃܶȹ«Ê½Çó³öСʯ¿éµÄÃܶÈ
С¸ÕÍê³É¸ÃʵÑéºó´ÓÒçË®±­ÖÐÈ¡³öСʯͷֱ½Ó·ÅÔÚÒѵ÷ºÃµÄÌìƽÉϲâ³öÖÊÁ¿£¬ÕâʱСʯͷմÓÐË®£¬²âµÃµÄÖÊÁ¿Æ«´ó£®¸ù¾ÝÃܶȹ«Ê½£¬Çó³öµÄÃܶȱÈʵ¼ÊÃܶȴó

½â´ð ½â£º·½°¸Ò»£ºµ±Ê¯¿é½þûÔÚË®ÖÐʱ£¬Ê¯¿éµÄÌå»ýµÈÓÚÒç³öË®µÄÌå»ý£¬¹ÊÓ¦ÓÃÉÕ±­½ÓסÒç³öµÄË®£¬²¢½«Òç³öµÄË®µ¹ÈëÁ¿Í²ÖУ¬²â³öÒç³öË®µÄÌå»ý¼´ÎªÊ¯¿éµÄÌå»ý£»
·½°¸¶þ£ºÐ¡Ê¯¿éÊܵ½µÄ¸¡Á¦Îª£ºF_¸¡=G-F£®
ÒòΪF_¸¡=¦Ñ_Ë®gV_ÅÅ=G-F£¬
Сʯ¿é½þûÔÚË®ÖУ¬
ËùÒÔСʯ¿éµÄÌå»ý£ºV=V_ÅÅ=$\frac{{F}_{¸¡}}{g{¦Ñ}_{Ë®}}$=$\frac{G-F}{g{¦Ñ}_{Ë®}}$£¬
Сʯ¿éµÄÃܶȣº¦Ñ=$\frac{m}{V}$=$\frac{\frac{G}{g}}{\frac{G-F}{g{¦Ñ}_{Ë®}}}$=$\frac{G}{G-F}$¦Ñ_Ë®£®
²âÁ¿µÄСʯͷմÓÐË®£¬Ôì³É²âÁ¿µÄÖÊÁ¿Æ«´ó£¬
¸ù¾ÝÃܶȹ«Ê½¦Ñ=$\frac{m}{V}$£¬Ó°ÏìÃܶȴóСµÄÁ½¸öÒòËØÊÇÎïÌåµÄÖÊÁ¿ºÍÌå»ý£¬ÖÊÁ¿±ä´ó£¬ÔÚÌå»ýÒ»¶¨µÄÇé¿öÏ£¬ÆäÃܶȾͱä´ó£®
¹Ê´ð°¸Îª£º·½°¸Ò»£ºB¡¢½ÓסÒçË®±­ÖÐÒç³öµÄË®£»C¡¢ÒçË®±­ÖеÄË®µ¹ÈëÁ¿Í²ÖУ»  ·½°¸¶þ£ºC¡¢$\frac{G}{G-F}$¦Ñ_Ë®£»
Ò»£»´ó£»ÉÕ±­ÍùÁ¿Í²µ¹Ë®Ê±£¬ÉÕ±­ÖÐÓвÐÁôµÄË®»ò²âʯ¿éÖÊÁ¿Ê±Ê¯¿éÉÏÕ´ÓÐË®£®

µãÆÀ ±¾ÌâÖص㿼²é¹ÌÌåÃܶȵIJâÁ¿ÒÔ¼°Ó¦Óð¢»ùÃ×µÂÔ­Àí½â¾öÎÊÌ⣮