设地球半径为R,则：
2paiR+30=2pai(R+h)
h=4m多,大象过去很容易!能够准确数算出来吗h=30/6.28=4.78m ok?
如果用一根很长的绳子沿地球赤道绕1圈,然后把绳子放长30m,这时绳圈与地球赤道之间的缝隙
如果用一根很长的绳子沿地球赤道绕1圈,然后把绳子放长30m,这时绳圈与地球赤道之间的缝隙
（假设各处缝隙是均匀的）有多大?一只老鼠能穿过吗?一只大象呢?
（假设各处缝隙是均匀的）有多大?一只老鼠能穿过吗?一只大象呢?
物理人气：535 ℃时间：2020-03-28 16:09:11
优质解答
我来回答
类似推荐
猜你喜欢
- 1Howlong does it take to boil two eggs if it takes four and a half minutes to boil one egg?
- 2I'm angry with Peter because he alway borrows my school thing ( ）permission
- 39999*3333+2222*3334简便运算
- 4把一个圆形纸片剪开后,拼成一个宽等于半径,面积不变的近似长方形的周长是33.12CM这个圆形的面积为多少
- 5点p(cosθ,sinθ)到直线 根号3-y+1=0的距离的最大值为
- 6中考作文是写记叙文好还是抒情散文好写 （本人表示记叙文记叙的事一塌糊涂）
- 7英文翻译一句话.直到现在我才知道.原来不是这个意思.
- 8You don't study hard.You will not pass the exam合并为一句
- 9I love you too,will never change.if you don't love me,i will not give love you,though i'll let go,but i would never aban
- 10单项选择.1.___smoke here,dad.Smoking has been banned in pubic places.A.Don't be B.Don't