题目

The Artist and the Beggar (1)        An artist was coming home by train one day. He hadn’t much money but was very kind. He gave his last few coins(2) to a beggar, but he saw another one, and forgot that he didn’t have any money in his pockets. He asked the man if he liked to have lunch with him, and the beggar, of course, agreed. So they went into a small restaurant and had a good meal.     In the end, the artist could not pay the bill (3), and the beggar had to do so. The artist felt very sorry for it, so he said to the beggar, “Come home with me in a taxi, my fr小明家新买了一个家用电热水壶，其有关的技术参数如图所示．他根据自己所学的相关物理知识想对新水壶进行一下验证，于是在家里做起了实验．他先把水倒入水壶标定容量处，用温度计测出水的初温是20℃，然后接通电源，同时开始记录时间，他发现电热水壶正常工作5min水便烧开了（设当时的气压为一标准大气压）．[1L＝10－3m3；C水＝4.2×103J/(kg·℃)]求：(1)烧开这壶水吸收的热量       J；    (2)电热水壶消耗的电能       J；(3)比较(1)、(2)两问所得的数据，请你做出合理解释（写出一种即可）       ．