英语:it's good ( ) hot food if you have a cold.甲同学站在钢管一端,乙在另一端.甲敲了一下钢管,乙听到两次声音,相隔3S.已知当时气温15度,钢管长1120m,求钢管传音的声速.
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英语:it''sgood()hotfoodifyouhaveacold.甲同学站在钢管一端,乙在另一端.甲敲了一下钢管,乙听到两次声音,相隔3S.已知当时气温15度,钢管长1120m,求钢管传音的声速.
英语:it's good ( ) hot food if you have a cold.甲同学站在钢管一端,乙在另一端.甲敲了一下钢管,乙听到两次声音,相隔3S.已知当时气温15度,钢管长1120m,求钢管传音的声速.
英语:it's good ( ) hot food if you have a cold.
甲同学站在钢管一端,乙在另一端.甲敲了一下钢管,乙听到两次声音,相隔3S.已知当时气温15度,钢管长1120m,求钢管传音的声速.
英语:it's good ( ) hot food if you have a cold.甲同学站在钢管一端,乙在另一端.甲敲了一下钢管,乙听到两次声音,相隔3S.已知当时气温15度,钢管长1120m,求钢管传音的声速.
eating
气温15度,声音在空气中的传播速度为:340 m/s
假设钢管传音的声速为x m/s
那么
(x-340)*3=1120
x=340+1120/3=713.3m/s
当气温为15度时,声音的速度为340m/s
设钢管传声的速度为Xm/s
1120/x +3 =1120/340
1120/x=100/340
交叉相乘
x=3808m/s
验算:1120/3808=0.29s 1120/340=3.29s
3.29-0.29=3s
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