题干

学校物理兴趣小组的同学,为了判断一个铝球是否是实心的,他们对铝球进行了测量,实验数据如下:(ρ=2.7×103kg/m3

铝球质量m/g

水的体积V1/ml

水和铝球的总体积V2/ml

27

50.0

65.0

求:①该铝球是空心的还是实心的?

②若铝球是空心的,空心部分的体积是多少?

③若在空心部分注满水,球的总质量是多少?

上一题 下一题 0.0难度 选择题 更新时间:2012-07-30 10:07:37

答案(点此获取答案解析)

同类题5

根据短文理解,选择正确答案。

    Peking Opera (Beijing Opera), is one of the oldest forms of dramas(戏剧) in the world. The roles(角色) in it were Sheng, Dan, Jing, Mo, Chou, Wuhang, and Longtao during its early age. But with the change of Peking Opera, there are four main roles in it today: Sheng, Dan, Jing and Chou.

    Sheng——Men Roles

    Sheng are the men roles in Peking Opera, which can be divided into Laosheng, Wusheng, Xiaosheng and Wawasheng.

    Laosheng are middle-aged or older men who are honest. Hongsheng,a type of Laosheng, have a red face. There are only two roles famous as Hongsheng. One is Guan Gong and the other is Zhao Kuangyin. Wusheng are young generals(将军) who are good at martial arts(武术). Xiaosheng are clean-shaven(没有胡须的) and handsome. Wawasheng are children's parts.

    Dan——women Roles

    Dan are women roles that can be divided into different types——Laodan, Qingyi, Huadan, Wudan and Caidan.

    Laodan play old and clever women. Qingyi are the main women roles. Huashan, a type of Qingyi, was created by Mei Lanfang, who played an important role in shaping Peking Opera. Huadan are lively and unmarried women roles. Wudan characters are women, good at martial arts. Caidan are clowns(小丑) in funny plays.

    Jing——Painted Face Men Roles

    A Jing role is an important man character with striking(吸引人的) looks and high social position. The main types of Jing are Tongchui, good at singing and usually a general; Jiazi, good at acting with less singing; and Wujing, a martial arts and acrobatics(杂技) role.

    Chou——Comedy Roles

    Chou are comedy(喜剧) roles in Peking Opera. There are Wenchou who speak, act and sing, and Wuchou who both speak and fight. What makes this type of role special is a small patch(块) of white chalk around the nose. One of the famous roles is the Monkey King, who has a special position in the hearts of all who are interested in Chinese opera.