Question

11£®ÈçͼÊÇijÐͺŵçÈÈË®ºøµÄÃúÅÆ£®
£¨1£©Èç¹ûºøÖÐ×°ÂúζÈΪ25¡æµÄË®£¬½«Ë®ÉÕ¿ªË®ÎüÊÕµÄÈÈÁ¿5.67¡Á10⁵J£®£¨ÔÚ±ê×¼´óÆøѹÏ£¬c_Ë®=4.2¡Á10³J/£¨kg•¡æ£©
£¨2£©Èç¹ûµç·ֻÓеçÈÈË®ºø¹¤×÷£¬±êÓС°3000r/kW•h¡±µçÄܱíµÄÂÁÅÌÔÚ10minÄÚתÁË500ת£®µçÈÈË®ºøµÄʵ¼Ê¹¦ÂÊÊÇ1000W£®
£¨3£©µçÈÈË®ºøÉÕË®¹ý³ÌÖУ¬Êµ¼Ê¹¦Âʱȶ¹¦ÂÊС£¬ÆäÔ­Òò¿ÉÄÜÊǵç·ÖеÄʵ¼ÊµçѹµÍÓڶµçѹ£®£¨Ð´Ò»ÖÖ¼´¿É£©

Answer 1

·ÖÎö £¨1£©¸ù¾Ým=¦ÑVÇó³öË®µÄÖÊÁ¿£»¸ù¾ÝQ=cm£¨t-t0£©Çó³öË®ÎüÊÕµÄÈÈÁ¿£»
£¨2£©±¾ÌâÊ×ÏÈÒªÇå³þ¡°3000r/kW•h¡±µÄÎïÀíÒâÒ壺µ±ÓõçÆ÷ÏûºÄ1kW•hµÄµçÄÜ£¬µçÄܱíµÄˮƽתÅÌת¹ý3000ת£¬1¶È=3.6¡Á10⁶½¹£¬¼´1kW•h=3.6¡Á10⁶J£¬ÔÙ¸ù¾ÝP=$\frac{W}{t}$Çó³öʵ¼Ê¹¦ÂÊ£»
£¨3£©¸ù¾ÝÐÅÏ¢Êý¾Ý¿ÉÖªµçË®ºøµÄ¶î¶¨¹¦ÂÊΪ1210W£¬¶øʵ¼Ê¹¦ÂÊΪ1000W£¬Ô­Òò¿ÉÄÜÊÇʵ¼Êµçѹ¹ýµÍ£®

½â´ð ½â£º£¨1£©Ë®µÄÌå»ýV=1.8L=1.8¡Á10^-3 m³£¬
ÒòΪ¦Ñ=$\frac{m}{V}$£¬
ËùÒÔË®µÄÖÊÁ¿£ºm=¦ÑV=1¡Á10³kg/m³¡Á1.8¡Á10^-3 m³=1.8kg£¬
½«Ë®ÉÕ¿ªË®ÎüÊÕµÄÈÈÁ¿£º
Q=cm£¨t-t₀£©=4.2¡Á10³J/£¨kg•¡æ£©¡Á1.8kg¡Á£¨100¡æ-25¡æ£©=5.67¡Á10⁵ J£»
£¨2£©µçÈȺøÏûºÄµÄµçÄÜ£ºW=$\frac{500}{13000}$kW•h=$\frac{1}{6}$kW•h£¬
µçÈȺøµÄʵ¼Ê¹¦ÂÊ£ºP_ʵ=$\frac{W}{t}$=$\frac{\frac{1}{6}kW•h}{\frac{10}{60}h}$=1kW=1000W£»
£¨3£©¸ù¾ÝÐÅÏ¢Êý¾Ý¿ÉÖªµçË®ºøµÄ¶î¶¨¹¦ÂÊΪ1000W£¬¶øʵ¼Ê¹¦ÂÊΪ900W£¬Ô­Òò¿ÉÄÜÊÇʵ¼ÊµçѹСÓڶµçѹ£®
¹Ê´ð°¸Îª£º£¨1£©5.67¡Á10⁵ £»£¨2£©1000£»£¨3£©µç·ÖеÄʵ¼ÊµçѹµÍÓڶµçѹ

µãÆÀ ´ËÌâÖ÷Òª¿¼²éµÄÊÇѧÉú¶ÔÖÊÁ¿¡¢ÈÈÁ¿¡¢µç¹¦ÂʼÆË㹫ʽµÄÀí½âºÍÕÆÎÕ£¬×¢Òâ±äÐι«Ê½µÄÊìÁ·ÔËÓã®