下列关于声现象的说法正确的是

物理知识

Quiz
•
Physics
•
6th - 8th Grade
•
Medium

颖 郝
Used 1+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
声音在真空中传播速度最快
打雷时捂住耳朵可以防止雷声的产生
人的听觉频率范围是20Hz到2000Hz
中考期间学校路段禁止鸣笛,这是在转播过程中减弱噪声
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列不属于科学研究的事
苹果落在牛顿头上,发现万有引力
瓦特好奇水沸腾,发明蒸汽机
麦哲伦航海探险,发现地球是圆的
小明到杭州旅游,发现西湖美景
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
发现光的色散现象的科学家是
艾萨克●牛顿
尼古拉●特斯拉
物理老师●罗
史蒂芬●霍金
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
关于粒子和宇宙,下列说法中正确的是
卢瑟福发现了电子
固体分子间距离大于液体分子间距离
验电器是用来检验物体带各种电荷的仪器
“顿牟掇芥”是一种静电现象
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
关于物理学史说法正确的是
哥白尼提出了“地心说”
牛顿发现了万有引力
爱因斯坦是“实验物理的先驱”
波尔、普朗特是相对论的奠基人
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有关使用酒精灯的操作中错误的是
用湿毛巾扑灭在桌子上燃烧的酒精
用盖帽熄灭酒精灯
用蜡烛或木条点燃酒精灯
一般用酒精灯的内焰加热,因为内焰的温度最高
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列关于实像和虚像的说法正确的是
虚像是人的幻觉,其实并没有光线进入人眼
实像能呈现在光屏上,而虚像不能
实像都是由光线的折射形成的,虚像都是由光线的反射形成的
实像有放大的有缩小的,虚像都是与物等大的
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