英文计算题If one micrometeorite (a sphere with a diameter of 2.4
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英文计算题
If one micrometeorite (a sphere with a diameter of 2.4 10^(-6) m) struck each square meter of the Moon each second,how many years would it take to cover the Moon to a depth of 1.0 (Hint:Consider a cubic box,1.0 m on a side,on the Moon,and find how long it would take to fill the box.)
If one micrometeorite (a sphere with a diameter of 2.4 10^(-6) m) struck each square meter of the Moon each second,how many years would it take to cover the Moon to a depth of 1.0 (Hint:Consider a cubic box,1.0 m on a side,on the Moon,and find how long it would take to fill the box.)
如果一颗小殒石(直径为2.4 10^(-6) m的小球)撞击月球的每一平方米每一秒,多少年它会覆盖月球一米深?(提示:考虑月球上一个正方体盒子,边长一米,找出多少时间,它能装满这个盒子)
殒石体积:球体体积:4/3*圆周率*半径的立方
v=(4/3)*pai*(1.2*10^(-6))^3
再用1立方米处以这个体积,然后再把秒换算成年,不同我再算了吧?
殒石体积:球体体积:4/3*圆周率*半径的立方
v=(4/3)*pai*(1.2*10^(-6))^3
再用1立方米处以这个体积,然后再把秒换算成年,不同我再算了吧?
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