Question

4£®Ð¡¸ÕÏëÁ˽⻨ÉúÓ͵ÄÃܶȣº
£¨1£©Ð¡¸ÕÏ룬»¨ÉúÓÍÊÇÓÍÀ࣬ËüµÄÃܶÈÓ¦¸Ã±ÈˮС£¬ÓÚÊÇËûµÎÁËÒ»µÎÓÍÔÚË®ÖУ¬·¢ÏÖÓ͸¡ÔÚË®ÃæÉÏ£¬ÓÉ´Ë¿ÉÒÔÖ¤Ã÷ËûµÄ²ÂÏëÊÇÕýÈ·µÄ£®
£¨2£©ÔÚµ÷½ÚÌìƽƽºâʱ·¢ÏÖÖ¸ÕëÖ¸ÔÚ·Ö¶ÈÅÌÈçͼ1µÄλÖã¬ËûÓ¦¸Ã½«Æ½ºâÂÝĸÏò×óÒƶ¯£®
£¨3£©ÓÃÌìƽ²â³öÉÕ±­ºÍ»¨ÉúÓ͵Ä×ÜÖÊÁ¿Îª150g£¬È»ºó½«Ò»²¿·Ö»¨ÉúÓ͵¹ÈëÁ¿Í²ÖУ¬ÔÙ²â³öÊ£Ó໨ÉúÓͺÍÉÕ±­µÄÖÊÁ¿Îª106.8g£¬¶Á³öÁ¿Í²Öл¨ÉúÓ͵ÄÌå»ý£¬Èçͼ15¼×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£©
150	106.8

£¨4£©Í¼2ÒÒÊÇËûÔÚʵÑé½áÊøºóÕûÀíÆ÷²ÄµÄÇé¾°£¬ÆäÖвÙ×÷²»¹æ·¶µÄÊÇÖ±½ÓÓÃÊÖÈ¡íÀÂ룮

Answer 1

·ÖÎö £¨1£©ÎïÌåµÄ¸¡³Á¾ö¶¨ÓÚÎïÌåÓëÒºÌåµÄÃܶȹØϵ£¬·´Ö®£¬Ò²¿ÉÒÔ¸ù¾ÝÎïÌåµÄ¸¡³ÁÈ·¶¨ÎïÌåÓëÒºÌåÖ®¼äµÄÃܶȹØϵ£»
£¨2£©ÌìƽʹÓÃÇ°µ÷½Úƽºâʱ£¬Òªµ÷½ÚƽºâÂÝĸ£¬¹æÔòÊÇ¡°ÓÒÆ«×óµ÷£¬×óÆ«ÓÒµ÷¡±£¬¼´Ö¸ÕëÏòÓÒÆ«¾ÍÏò×óµ÷ƽºâÂÝĸ£¬Ö¸ÕëÏò×óÆ«¾ÍÏòÓÒµ÷ƽºâÂÝĸ£¬µ÷×ó²àµÄ»¹ÊÇÓÒ²àµÄƽºâÂÝĸ¶¼ÊÇ¿ÉÒԵģ»
£¨3£©»¨ÉúÓ͵ÄÖÊÁ¿m=ÉÕ±­ºÍ»¨ÉúÓ͵Ä×ÜÖÊÁ¿-Ê£Ó໨ÉúÓͺÍÉÕ±­µÄÖÊÁ¿£»
»¨ÉúÓ͵ÄÌå»ýv¾ÍÊÇÔÚÁ¿Í²ÖеÄʾÊý£¬¶ÁÊýʱÊÓÏßÒªÓëÒºÃæµÄ°¼ÃæÏàƽ£»
ÀûÓæÑ=$\frac{m}{V}$¿ÉÇóµÃ»¨ÉúÓ͵ÄÃܶȣ»
£¨4£©È¡·ÅíÀÂëʱ£¬ÎªÁËíÀÂë²»ÊÜÇÖÊ´£¬²»ÄÜÖ±½ÓÓÃÊÖÈ¥Äã®

½â´ð ½â£º£¨1£©´ÓÎïÌåµÄ¸¡³ÁÌõ¼þ¿ÉÖª£¬µ±ÓÍƯ¸¡ÔÚË®ÃæÉÏʱ£¬ËµÃ÷ÁËÓ͵ÄÃܶÈСÓÚË®µÄÃܶȣ®¹Ê²ÂÏëÕýÈ·£»
£¨2£©ÏÖÌìƽµÄÖ¸ÕëÆ«Ïò¿Ì¶ÈÅ̵ÄÓҲ࣬ΪʹÌìƽƽºâ£¬Ó¦½«Æ½ºâÂÝĸÏò×óµ÷£»
£¨3£©ÓÉͼ¿ÉÖª£ºÁ¿Í²Öл¨ÉúÓ͵ÄÌå»ýΪV=54mL=54cm³£»
»¨ÉúÓ͵ÄÖÊÁ¿£ºm=m₁-m₂=150g-106.8g=43.2g£»
ËùÒÔ»¨ÉúÓ͵ÄÃܶȣº¦Ñ=$\frac{m}{V}$=$\frac{43.2g}{54c{m}^{3}}$=0.8g/cm³£»
£¨4£©Ö±½ÓÓÃÊÖÈ¡·ÅíÀÂ룬ÊÖÉϵĺ¹×Õ»áÎÛȾíÀÂ룬ʱ¼ä³¤ÁË»áʹíÀÂë·¢ÉúÐâÊ´£¬ÎªÁ˱£»¤íÀÂë²»±»ÇÖÊ´£¬ËùÒÔ²»ÄÜÖ±½ÓÓÃÊÖÈ¡íÀÂ룮
¹Ê´ð°¸Îª£º£¨1£©ÕýÈ·£»£¨2£©×󣻣¨3£©

²£Á§±­ºÍ»¨ÉúÓ͵ÄÖÊÁ¿£¨g£©	²£Á§±­ºÍÊ£Ó໨ÉúÓ͵ÄÖÊÁ¿£¨g£©	Á¿Í²Öл¨ÉúÓ굀 ÖÊÁ¿£¨g£©	Á¿Í²Öл¨ÉúÓ굀 Ìå»ý£¨cm3£©	»¨ÉúÓ͵ÄÃÜ¶È £¨g•cm-3£©
150	106.8	43.2	54	0.8

£¨4£©Ö±½ÓÓÃÊÖÈ¡íÀÂ룮

µãÆÀ ±¾ÌâÊÇÒ»µÀ¹ØÓÚÃܶȲâÁ¿µÄʵÑéÌ⣬Ö÷Òª¿¼²éÁËÌìƽ¡¢Á¿Í²µÄʹÓúͶÁÊý£¬ÊôÓÚ»ù±¾ÄÜÁ¦µÄ¼ìÑ飬ÄÑÒ׳̶ÈÊÊÖУ®