皮皮学，免费搜题
登录
搜题
【简答题】
小用易拉罐做成像实验，他在空易拉罐底部的中央，用钉子戳一个，将易拉罐的顶部剪去后，蒙上一层半透明塑料薄膜． （1）把易拉罐正对着点燃的蜡烛（如图所示），则在半透明纸上会看到蜡烛的______（选填“正立”或“倒立”）的像，这现象可用光的______知识解释． （2）实验时发现成像的大小会变化，于是他设计实验探究所成像的大与哪些因素有关．他猜想所成像的大小可能与蜡烛到的距离、物体的高度以及像到的距离有关．于是他用同一支蜡烛实验，且保持蜡烛到的距离不变，在多次改变到半透明纸之间的距离时，他测出了像的高度（见下表）． 到半透明纸的距离s/cm 2.0 4.0 6.0 8.0 10.0 像的高度h/cm 1.0 2.0 3.0 4.0 5.0 从表格中可以看出：当蜡烛和的距离保持不变时，半透明纸离越远，所成的像越______．请你根据有关结论判断：当半透明纸距13cm时，像的高度是______cm． （3）通过实验，得到了正确的结论后很高兴．但他又想，像的大小会不会跟蜡烛离的距离有关呢？在设计这个实验时应注意控制______、______不变．
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【判断题】Self confidence and a “can do” attitude is the biggest quality a businessman ought to have.
A.
正确
B.
错误
【判断题】Your self-esteem and confidence can get a big boost during the school sports participation.
A.
正确
B.
错误
【简答题】One way to develop self-confidence is to do the thing you fear and get a record of successful experiences behind you. Confidence does not equal self-importance. Self-importance is born ...
【简答题】Besides physical appearance, self-confidence can be greatly influenced by ______.
【单选题】Self-confidence can be cultivated by______.
A.
self-improvement
B.
knowing yourself
C.
self-reliance
D.
self-discipline
【简答题】如何确定参加面试（专业科目考试）人员名单？
【单选题】What can help teens gain self-confidence?
A.
Respect from their friends based upon the things teens can do well.
B.
Respect from their parents based upon the decisions teens can make on their own.
C.
A good set of values that can teach them the true meaning of happiness.
D.
Rebellion and discovery of what is really important.
【简答题】第二章第一课时课后作业.doc
【简答题】假如你在参加A公司的面试,面试后,如何写一封感谢信?
相关题目：