Sound is produced by vibrations. What is the speed of sound in air? A. 340 meters per second. B. 340 kilometers per hour. C. 3400 meters per second. D. 3400 kilometers per hour. 相关知识点: 试题来源: 解析 A。解析:声音在空气中的传播速度是 340 米每秒。选项 B、C、D 速度错误。
结果1 题目 25 What does the speed of sound in air depend on? A temperature of the air B pitch of the sound C loudness of the sound D distance between the source and receiver of the sound 相关知识点: 试题来源: 解析 A 反馈 收藏 ...
Which of the following is the speed of sound in copper and which in al... Text Solution What is the speed of sound: (a) in air? (b) in water? (c) in iron? 01:27 What name is gives to those aircrafts which fly at speeds greater than... 01:32 What is meant by supersonic ...
求翻译:what is the speed of sound?是什么意思?待解决 悬赏分:1 - 离问题结束还有 what is the speed of sound?问题补充:匿名 2013-05-23 12:26:38 什么是 sound? 的速度热门同步练习册答案初中同步测控优化设计答案 长江作业本同步练习册答案 名校课堂助教型教辅答案 U计划学期系统复习答案 同步练习册...
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1. What's the speed of sound at 2500 meters above sea level?相关知识点: 试题来源: 解析 285.3米/秒 声音速度受温度和气压影响。在2500米海拔,气压约为海平面的0.75倍,温度约为-2摄氏度。根据公式c = 331.5 + 0.6T,在-2摄氏度时,声音速度约为330.3米/秒。由于声音速度与气压平方根成正比,因此在...
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( )5.WhydoesthetextbeginwithKatherine?sconflictwithherson? A.Toleadintheuseofperiodintexting. B.Toemphasizethegreatpowerofwords. C.Toshowyoungsters?attitudestowardstexting. D.Tosuggesttherightuseofpunctuationmarks. ( )6.WhyisJuanAbenanteRinconmentionedinthetext? A.Tomakeassessmentsontherecentstudy. ...
At the end of the second journey, the author ___. A.felt a pttle bit disappointed B.decided to come again in the future C.could hardly tear himself away from the river D.had estabpshed a close relationship with the guide 免费查看参考答案及解析 题目: 羊水栓塞(AFE) 免费查看参考答案...
At slow speeds, that change in density is imperceptible. At the speed of light, it's a different story. Related: What would happen if the speed of light were much lower? "What would happen is you have pretty humid air [during a lightning storm], the sound wave comes through and ...