初一科学下册第5-7章
Flashcard
•
Science
•
7th Grade
•
Practice Problem
•
Hard
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1.
FLASHCARD QUESTION
Front
一个0.5m x 0.2m x 0.1m的长方体,重量为50N,它可施于一水平上的最大压强是多少呢?
Back
2500Pa
2.
FLASHCARD QUESTION
Front
力的单位是什么?写出符号。
Back
N
3.
FLASHCARD QUESTION
Front
一根原长10cm的弹簧受2N的拉力时,它的长度变为12cm。若受5N的拉力,它的长度应是多少?
Back
15cm
4.
FLASHCARD QUESTION
Front
一个质量为2kg 的遥控飞机正悬停在半空中,遥控飞机的升力是__________。 ( g=10N/kg )
Back
大小约为 20N,方向竖直向上
5.
FLASHCARD QUESTION
Front
图中是小玲研究影响压力的作用效果的因素。 如果小玲想要探究受力面积是否会对海绵的凹陷程度造成影响,请找出一组对 照实 验。(写大写,答案间用“,”间隔) Options: B, C, B,C
Back
B, C, B,C
6.
FLASHCARD QUESTION
Front
以下安全提示中主要考虑摩擦力因素的是?
Back
雨天路滑,请小心驾驶
7.
FLASHCARD QUESTION
Front
一小朋友在玩耍时,不小心把他妈妈的金戒指套在了他的大拇指上,谁知正好紧紧地箍在上边,怎么也拔不下来,急得大哭。他姐姐听见后,想了个好办法顺利地解决了问题。她的办法是?
Back
顺着手指倒肥皂水
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