Question

6£®ÈçͼÊÇСÜøͬѧ²âÁ¿½´Ó͵ÄÃܶȵļòÒª¹ý³Ì£¬ÇëÄã°ïÖúСÜøÍê³ÉÏÂÁÐÎÊÌ⣺

£¨1£©ÊµÑé²½Ö裺¢ÙÔÚÉÕ±­ÖÐÊ¢Ò»¶¨Á¿µÄ½´ÓÍ£¬Óõ÷½ÚºÃµÄÌìƽ²âÁ¿ÉÕ±­ºÍ½´Ó͵Ä×ÜÖÊÁ¿Îªm₁£®¢Ú½«ÉÕ±­Öв¿·Ö½´Ó͵¹ÈëÁ¿Í²ÖУ¬¶Á³öÁ¿Í²Öн´Ó͵ÄÌå»ýΪV£®¢ÛÔÙÓÃÌìƽ²â³öÉÕ±­ÖÐʣϽ´Ó͵ÄÖÊÁ¿m₂£®¢ÜÔÙÖظ´ÉÏÊöʵÑéÁ½´Î£¬½«ËùµÃÊý¾ÝÌîÈë±í¸ñ£®¢Ý¸ù¾Ý¦Ñ=$\frac{m}{V}$Çó³öÈý´ÎÃܶÈÖµ£¬ÔÙÇó³öÃܶȵÄƽ¾ùÖµ£®
£¨2£©ÊµÑé½áÂÛ£º½´Ó͵ÄÃܶÈÊÇ1.06¡Á10³kg/m³£®

	µÚÒ»´Î	µÚ¶þ´Î	µÚÈý´Î	ÃܶÈƽ¾ùÖµ /£¨kg/m3£©
ÖÊÁ¿m/g	21	21.2	21.2
Ìå»ýV/cm3	20	20	20
ÃܶȦÑ/£¨g/cm3£©	1.05	1.06	1.06

£¨3£©ÁíһλͬѧСÁÁÔڲ⽴ÓÍÃܶÈʱ²ÉÓá°ÏȲâ¿ÕÉÕ±­ÖÊÁ¿£¬ÔÙ²âÉÕ±­ºÍ½´Ó͵Ä×ÜÖÊÁ¿£¬ÔÙ½«½´ÓÍÈ«²¿µ¹ÈëÁ¿Í²ÖС±µÄ·½·¨£®Ð¡ÁÁµÄ·½·¨ÔÚ½«½´ÓÍÈ«²¿µ¹ÈëÁ¿Í²µÄ¹ý³ÌÖн´ÓÍ»áÕ´ÔÚÉÕ±­ÄÚ±ÚÉϵ¼Ö²âÁ¿µÄ½´Ó͵ÄÌå»ýƫС£¬´Ó¶øʹ²âµÃµÄÃܶÈֵƫ´ó£®

Answer 1

·ÖÎö £¨1£©ÓÉÃܶȹ«Ê½Öª£¬Òª²âÒºÌåÃܶȾÍÊÇÒª·Ö±ð²â³öÆäÖÊÁ¿ºÍÌå»ý£¬ÓÉͼʾ·ÖÎö½â´ðʵÑéµÄ²½Ö裻
£¨2£©¸ù¾Ý±íÖÐÊý¾Ý¼ÆËãÈý´Î²âÁ¿½´ÓÍÃܶȵÄƽ¾ùÖµ£»
£¨3£©ÔÚ²âÒºÌåÃܶÈʱ£¬ÈÝÆ÷ÖеÄÒºÌåÏòÍâµ¹µÄ¹ý³ÌÖУ¬ÈÝÆ÷±ÚÒ»¶¨ÒªÕ³ÒºÌ壬ËùÒÔ²»ÄÜÈ«²¿µ¹³ö£¬½«»á´øÀ´ÊµÑéÎó²î£¬Ã÷È·¶ÔÌå»ý²âÁ¿½á¹ûµÄÓ°Ï죬½øÒ»²½Åж϶ÔÃܶȲâÁ¿½á¹ûµÄÓ°Ï죮

½â´ð ½â£º
£¨1£©ÓÉͼʾ£¬ÊµÑé²½Ö裺
¢ÙÔÚÉÕ±­ÖÐÊ¢Ò»¶¨Á¿µÄ½´ÓÍ£¬Óõ÷½ÚºÃµÄÌìƽ²âÁ¿ÉÕ±­ºÍ½´Ó͵Ä×ÜÖÊÁ¿Îªm₁£®
¢Ú½«ÉÕ±­Öв¿·Ö½´Ó͵¹ÈëÁ¿Í²ÖУ¬¶Á³öÁ¿Í²Öн´Ó͵ÄÌå»ýΪV£®
¢ÛÔÙÓÃÌìƽ²â³öÉÕ±­ÖÐʣϽ´Ó͵ÄÖÊÁ¿m₂£®
¢ÜÔÙÖظ´ÉÏÊöʵÑéÁ½´Î£¬½«ËùµÃÊý¾ÝÌîÈë±í¸ñ£®
¢Ý¸ù¾Ý¦Ñ=$\frac{m}{V}$Çó³öÈý´ÎÃܶÈÖµ£¬ÔÙÇó³öÃܶȵÄƽ¾ùÖµ£®
£¨2£©ÓɱíÖÐÊý¾Ý£¬½´Ó͵ÄÃܶȣº
¦Ñ=$\frac{{¦Ñ}_{1}+{¦Ñ}_{2}+{¦Ñ}_{3}}{3}$=$\frac{1.05g/c{m}^{3}+1.06g/c{m}^{3}+1.06g/c{m}^{3}}{3}$¡Ö1.06g/cm³=1.06¡Á10³kg/m³£»
£¨3£©°ÑÉÕ±­ÄڵĽ´ÓÍÈ«²¿µ¹ÈëÁ¿Í²ÄÚ£¬ÓÉÓÚÒ»²¿·Ö½´ÓÍ»áÕ´ÔÚÉÕ±­ÄÚ±ÚÉÏ£¬»áµ¼Ö²âÁ¿µÄ½´Ó͵ÄÌå»ýƫС£¬Óɹ«Ê½¦Ñ=$\frac{m}{V}$Öª£ºÃܶȲâÁ¿½á¹ûÆ«´ó£®
¹Ê´ð°¸Îª£º£¨1£©¢ÚÉÕ±­Öв¿·Ö½´Ó͵¹ÈëÁ¿Í²ÖУ»¢ÛÓÃÌìƽ²â³öÉÕ±­ÖÐʣϽ´Ó͵ÄÖÊÁ¿m₂£»¢Ý¦Ñ=$\frac{m}{V}$£»£¨2£©1.06¡Á10³£»
£¨3£©½´ÓÍ»áÕ´ÔÚÉÕ±­ÄÚ±ÚÉϵ¼Ö²âÁ¿µÄ½´Ó͵ÄÌå»ýƫС£»Æ«´ó£®

µãÆÀ ±¾ÌâÊÇÒºÌåÃܶȲâÁ¿µÄʵÑ飬¿¼²éÁËʵÑé²½Öè¡¢ÃܶȼÆËãÒÔ¼°ÊµÑéÎó²îµÄ·ÖÎö£¬Ó¦ÕÆÎպã®