ÌâÄ¿ÄÚÈÝ
£¨2013?ÁùºÏÇøһģ£©Ð¡Ã÷ÓÃͼ¼×ËùʾµÄ×°ÖÃ×ö¡°¹Û²ìË®µÄ·ÐÌÚ¡±ÊµÑ飮
£¨1£©ÎªÁËÍê³ÉʵÑ飬»¹ÐèÒªµÄ²âÁ¿Æ÷²ÄÊÇ
£¨2£©ÒÑ֪ˮµÄÖÊÁ¿Îª100g£¬ÔòË®´Ó80¡æÉý¸ßµ½90¡æÎüÊÕµÄÈÈÁ¿ÊÇ
£¨3£©Ï±íÊÇʵÑéÖÐËû¼Ç¼µÄÒ»×éÊý¾Ý£¬ÓÉÊý¾Ý¿ÉÖª£¬Ë®µÄ·ÐµãÊÇ
£¨1£©ÎªÁËÍê³ÉʵÑ飬»¹ÐèÒªµÄ²âÁ¿Æ÷²ÄÊÇ
Ãë±í
Ãë±í
£»£¨2£©ÒÑ֪ˮµÄÖÊÁ¿Îª100g£¬ÔòË®´Ó80¡æÉý¸ßµ½90¡æÎüÊÕµÄÈÈÁ¿ÊÇ
4.2¡Á103
4.2¡Á103
J£¬´Ë¹ý³ÌË®µÄÄÚÄÜÔö´ó
Ôö´ó
£¨Ñ¡Ìî¡°Ôö´ó¡±¡¢¡°²»±ä¡±»ò¡°¼õС¡±£©[Ë®µÄ±ÈÈÈÈÝΪ4.2¡Á103J/£¨kg?¡æ£©]£¨3£©Ï±íÊÇʵÑéÖÐËû¼Ç¼µÄÒ»×éÊý¾Ý£¬ÓÉÊý¾Ý¿ÉÖª£¬Ë®µÄ·ÐµãÊÇ
98
98
¡æ£¬¸ù¾Ý¼Ç¼µÄÊý¾Ý£¬ÔÚͼÒÒÖл³öË®·ÐÌÚÇ°ºóζÈËæʱ¼ä±ä»¯µÄͼÏó£®Ê±¼ä/min | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
ζÈ/¡æ | 90 | 92 | 94 | 96 | 98 | 98 | 98 | 98 | 98 |
·ÖÎö£º£¨1£©ÔÚʵÑéÖУ¬Ðè̽¾¿Î¶ÈËæʱ¼äµÄ±ä»¯£¬ËùÒÔÐèÒªÓõ½Î¶ȼƺÍÃë±í£»
£¨2£©¸ù¾ÝQ=cm£¨t-t0£©¼ÆËã³öË®ÎüÊÕµÄÈÈÁ¿£¬ÎüÈȺóÄÚÄÜÔö´ó£»
£¨3£©¸ù¾ÝË®·ÐÌÚʱζȱ£³Ö²»±äµÄÌصã½øÐзÖÎö£¬¸ù¾ÝÃèµã·¨×÷³öͼÏó£®
£¨2£©¸ù¾ÝQ=cm£¨t-t0£©¼ÆËã³öË®ÎüÊÕµÄÈÈÁ¿£¬ÎüÈȺóÄÚÄÜÔö´ó£»
£¨3£©¸ù¾ÝË®·ÐÌÚʱζȱ£³Ö²»±äµÄÌصã½øÐзÖÎö£¬¸ù¾ÝÃèµã·¨×÷³öͼÏó£®
½â´ð£º½â£º£¨1£©ÊµÑéÖÐÐèÒª¼Ç¼Î¶ÈËæʱ¼äµÄ±ä»¯£¬ËùÒÔ³ýÁËζȼƣ¬»¹ÐèÃë±í£»
£¨2£©QÎü=cË®mË®£¨t-t0£©=4.2¡Á103J/£¨kg?¡æ£©¡Á100¡Á10-3kg¡Á£¨90¡æ-80¡æ£©=4.2¡Á103J£»
´Ë¹ý³ÌÖÐË®ÎüÊÕÈÈÁ¿£¬Î¶ÈÉý¸ß£¬ÄÚÄÜÔö´ó£»
£¨3£©Óɱí¸ñÖÐÊý¾ÝÖª£¬Ë®ÔÚ·ÐÌÚ¹ý³Ìζȱ£³Ö98¡æ²»±ä£¬ËùÒԷеãÊÇ98¡æ£»
¸ù¾Ý±í¸ñÖÐÊý¾ÝÃèµã£¬²¢ÓÃƽ»¬µÄÇúÏßÁ¬½ÓÆðÀ´£¬ÈçͼËùʾ£º
£»
¹Ê´ð°¸Îª£º£¨1£©Ãë±í£¨¼ÆʱÆ÷£©£»£¨2£©4.2¡Á103J£»Ôö´ó£»£¨3£©98£»¼ûÉÏͼ£®
£¨2£©QÎü=cË®mË®£¨t-t0£©=4.2¡Á103J/£¨kg?¡æ£©¡Á100¡Á10-3kg¡Á£¨90¡æ-80¡æ£©=4.2¡Á103J£»
´Ë¹ý³ÌÖÐË®ÎüÊÕÈÈÁ¿£¬Î¶ÈÉý¸ß£¬ÄÚÄÜÔö´ó£»
£¨3£©Óɱí¸ñÖÐÊý¾ÝÖª£¬Ë®ÔÚ·ÐÌÚ¹ý³Ìζȱ£³Ö98¡æ²»±ä£¬ËùÒԷеãÊÇ98¡æ£»
¸ù¾Ý±í¸ñÖÐÊý¾ÝÃèµã£¬²¢ÓÃƽ»¬µÄÇúÏßÁ¬½ÓÆðÀ´£¬ÈçͼËùʾ£º
£»
¹Ê´ð°¸Îª£º£¨1£©Ãë±í£¨¼ÆʱÆ÷£©£»£¨2£©4.2¡Á103J£»Ôö´ó£»£¨3£©98£»¼ûÉÏͼ£®
µãÆÀ£º´ËÌâÊÇ̽¾¿Ë®µÄ·ÐÌÚʵÑ飬ʵÑéÖÐҪ̽¾¿Ë®µÄζÈËæʱ¼äµÄ±ä»¯£¬ËùÒÔÒªÓõ½Î¶ȼƺÍÃë±í£¬¿¼²éÁËÈÈÁ¿µÄ¼ÆËã¼°ÓйطÐÌÚͼÏóµÄ»·¨£¬ÔÚÁ¬½Ó¸÷µãʱ£¬Òª×¢ÒâÓÃƽ»¬µÄÇúÏߣ®
Á·Ï°²áϵÁдð°¸
Ïà¹ØÌâÄ¿