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物理
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3.0乘以10的8次方m/s在乘以2.56s在除以二,等于好多?
人气:253 ℃ 时间:2019-08-20 05:34:46
解答
256=2^8 => 2.56=2^8 /100
3.0*10^8 * 2.56/2
= 3.0*10^8 * (2^8/100)/2
= 3.0*10^8 *2^7/100
= 3.2*10^8 * 1.28
= 3.84*10^8
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