Question

20£®ÂèÂèÔÚ×ö²ËʱÎÊС¸Õ£¬ÄãÖªµÀ»¨ÉúÓ͵ÄÃܶÈÊǶà´ó£¿
£¨1£©Ð¡¸ÕÏ룬»¨ÉúÓÍÊÇÓÍÀ࣬ËüµÄÃܶÈÓ¦¸Ã±ÈˮС£¬ÓÚÊÇËûµÎÁËÒ»µÎÓÍÔÚË®ÖУ¬·¢ÏÖÓ͸¡ÔÚË®ÉÏ£¬ÓÉ´Ë¿ÉÒÔÖ¤Ã÷ËûµÄ²ÂÏëÊÇÕýÈ·µÄ£®
£¨2£©µ½Ñ§Ð£ºó£¬Ëû×öÁËÈçÏÂʵÑ飺ÏÈÓõ÷ºÃµÄÌìƽ²â³öÉÕ±­ºÍ»¨ÉúÓ͵Ä×ÜÖÊÁ¿150g£¬È»ºó½«Ò»²¿·Ö»¨ÉúÓ͵¹ÈëÁ¿Í²ÖУ¬ÔÙ²â³öÊ£Ó໨ÉúÓͺÍÉÕ±­µÄÖÊÁ¿Îª102.3g£¬¶Á³öÁ¿Í²Öл¨ÉúÓ͵ÄÌå»ý£¬Èçͼ¼×Ëùʾ£¬×îºóËã³ö»¨ÉúÓ͵ÄÃܶȣ¬ÇëÄ㽫²âµÃµÄ½á¹ûÌîÈëÏÂ±í£®

ÉÕ±­ºÍ»¨ÉúÓ͵Ä×ÜÖÊÁ¿£¨g£©	ÉÕ±­ºÍÊ£Ó໨ÉúÓ͵ÄÖÊÁ¿£¨g£©	»¨ÉúÓ͵ÄÖÊÁ¿£¨g£©	Á¿Í²Öл¨ÉúÓ͵ÄÌå»ý£¨cm3£©	»¨ÉúÓ͵ÄÃܶȣ¨g/cm3£©

£¨3£©Í¼ÒÒÊÇËûÔÚʵÑé½áÊøºóÕûÀíÆ÷²ÄµÄÇé¾°£¬ÆäÖвÙ×÷²»¹æ·¶µÄÊÇÖ±½ÓÓÃÊÖÈ¡·ÅíÀÂ룮

Answer 1

·ÖÎö £¨1£©¸ù¾ÝÎïÌåµÄ¸¡³ÁÌõ¼þ£¬½áºÏʳÓÃÓÍÔÚË®Öеĸ¡³ÁÇé¿ö¿ÉÒÔÈ·¶¨Ê³ÓÃÓÍÓëË®µÄÃܶȴóС¹Øϵ£®
£¨2£©ÀûÓÃÔ­À´µÄ×ÜÖÊÁ¿ºÍÊ£ÓàµÄÖÊÁ¿£¬¿ÉÒÔÇóµÃµ¹ÈëÁ¿Í²ÖеĻ¨ÉúÓ͵ÄÖÊÁ¿£®¸ù¾Ý»¨ÉúÓÍÔÚÁ¿Í²ÖеÄλÖÿÉÒԵõ½»¨ÉúÓ͵ÄÌå»ý£®ÀûÓÃÃܶȵļÆË㹫ʽ¿ÉÒÔÇóµÃ»¨ÉúÓ͵ÄÃܶȣ®
£¨3£©ÌìƽÔÚʹÓùý³ÌÖУ¬ÒªÓÃÄ÷×Ó¼Ó¼õíÀÂ룬²»ÄÜÓÃÊÖÄÃíÀÂ룮

½â´ð ½â£º£¨1£©ÕýÈ·£¬¸ù¾ÝÎïÌåµÄ¸¡³ÁÌõ¼þ¿ÉÖª£¬ÎïÌåÔÚÒºÌåÖеÄÉϸ¡»òϳÁÊÇÓÉÎïÌåºÍËùÔÚÒºÌåµÄÃܶȴóС¹Øϵ¾ö¶¨µÄ£»µ±ÎïÌåµÄÃܶÈÃܶÈСÓÚËùÔÚÒºÌåµÄÃܶÈʱ£¬ÎïÌ彫´¦ÓÚƯ¸¡×´Ì¬£¬·´¹ýÀ´£¬¿ÉÒÔÀûÓÃÎïÌåÔÚÒºÌåÖÐËù´¦µÄ״̬¿ÉÒÔÈ·¶¨ÎïÌåÓëÒºÌåÃܶȵĴóС¹Øϵ£®ÓÉÓÚ»¨ÉúÓÍÔÚË®ÖÐƯ¸¡£¬ËùÒÔÆäÃܶÈСÓÚË®µÄÃܶȣ¬¹Ê²ÂÏëÕýÈ·£®
£¨2£©¸ù¾ÝÀûÓÃÔ­À´µÄ×ÜÖÊÁ¿150gºÍÊ£ÓàµÄÖÊÁ¿102.3g£¬¿ÉÒÔÇóµÃµ¹ÈëÁ¿Í²ÖеĻ¨ÉúÓ͵ÄÖÊÁ¿Îªm=150g-102.3g=47.7g£¬¸ù¾Ýͼ¼×Öл¨ÉúÓÍÔÚÁ¿Í²ÖеÄλÖÿÉÒԵõ½»¨ÉúÓ͵ÄÌå»ýΪV=53cm³£®
»¨ÉúÓ͵ÄÃܶÈΪ£º¦Ñ=$\frac{m}{V}$=$\frac{47.7g}{53c{m}^{3}}$=0.9g/cm³£®
¹Ê¿ÉÌî±íÈçÏ£º

ÉÕ±­ºÍ»¨ÉúÓÍ µÄ×ÜÖÊÁ¿£¨g£©	ÉÕ±­ºÍÊ£Ó໨ ÉúÓ͵ÄÖÊÁ¿£¨g£©	»¨ÉúÓ굀 ÖÊÁ¿£¨g£©	»¨ÉúÓ굀 Ìå»ý£¨cm3£©	»¨ÉúÓ굀 Ãܶȣ¨g/cm3£©
150	102.3	47.7	53	0.9

£¨3£©Í¼ÒÒÊÇËûÔÚʵÑé½áÊøºóÕûÀíÆ÷²ÄµÄÇé¾°£¬ÆäÖвÙ×÷²»¹æ·¶µÄÊÇÓÃÊÖÄÃíÀÂ룮
¹Ê´ð°¸Îª£º£¨1£©ÕýÈ·£»£¨2£©150£»102.3£»47.7£»53£»0.9£»£¨3£©Ö±½ÓÓÃÊÖÈ¡·ÅíÀÂ룮

µãÆÀ ²âÁ¿ÃܶȵÄʵÑéÖйØÓÚÎó²î´óСµÄ·ÖÎöÊǾ­³£¿¼²éµ½µÄ֪ʶµã£¬Òª´ÓʵÑé¹ý³ÌÖÐÈ¥¿¼ÂÇ£®Ò»°ã´Ó²âÁ¿ÖÊÁ¿µÄ׼ȷÐÔºÍÌå»ýµÄ׼ȷÐÔÁ½·½ÃæȥͻÆÆ£®