英语：it's good ( ) hot food if you have a cold.

来源：学生作业帮编辑：百度作业网作业帮分类：英语作业时间：2024/08/09 06:41:31

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
再问：这是今天做的一张卷子啦，为什么老师和同学说答案是3180，貌似是这个哈？？？
再答：对不起，我看错了下题目，现在更正如下：声音在空气中的传播速度为：340 m/s 那么声音在空气中传播的时间为：1120/340=56/17 s 而声音在钢管中的传播速度大，那么肯定所需的时间短，相隔3s，那么声音在钢管中的传播时间为：56/17-3=5/17 s 所以声音在钢管中的传播速度为：1120/(5/17)=3808 m/s 也不是你说的3180，你记错了，呵呵~

英语：it's good ( ) hot food if you have a cold. 英语作文《Do you have a cold》《Are you healthy》《Healthy food ,good It's hot.How about_ (have) a cold drink? 英语短文填词,急Have you laughed today?It's good if you have because I'll have a cold drink ________ coffee bacause It's so hot. It's cold and hot If you want to keep the food good,you can put it in a c（） If you want to keep the food good,you can put it in a （） If you want to keep the food good,you can put it in a t_____ It is too hot Let's s_____ to have a good rest. Would you mind if I open the door?It's really hot inside.A Y it`s hot .i can`t stand the ----a.cold.b.hot. c.heat .d.cool