题库网 (tiku.one)

 找回密码
 立即注册

 

      

上传图片附件

未使用图片

小贴士: 允许的图片文件格式为: gif, jpg, jpeg, png, webp,上传完成后会在上方生成预览,用鼠标连续双击缩略图,或拖动缩略图,该图片就被绑定至本题,显示在题目下方

本次作答已使用

小贴士: 此栏目显示的是当前作答使用的所有图片,绑定到某一题目的图片同时会显示在该题目下方; 删除使用的图片会将其转移到<未使用图片>类别


习题练习:Doppler Effect



 作者: admin发布日期: 2024-07-31 22:30   总分: 4分  得分: _____________

答题人: 匿名未登录  开始时间: 24年07月31日 22:30  切换到: 整卷模式

标记此题
1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  98.18: When a train is /ux ( mod00rxpat rest, both a passenger on the train and a ticket seller on the station agree that theo 0xmpx0/(dur trains whistle produces sound at a frequency of 120 Hz. When the train is moving away from the station at 15 m/s, the passenger hears a frequency of _____ Hz and the ticket seller hears a frequency of ____ Hz.

参考答案:    

标记此题
2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.18: A car is moving tov5p 1r0xd5 h3kd 8yhmte -nh0v the left at 20 m/s while a truck is moving to the right at 25 m/s. If the truck emits a soundnv8 0yhrkd5p51-ehmh0 vdx t3 of frequency 5000 Hz, what is the perceived frequency of the sound by the driver of the car? Assume the vehicles are moving directly away from each other on a $20.0^{\circ}C$ day

参考答案:    

标记此题
3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  17.39: A point wave sourcuemz )8f slp/b(h,w dme-p ht5n dm8/8e travels along the x-axis at constant speed $v_s$. Stationary observers on the x-axis measure the wavelength of the waves that they receive. The ratio of the wavelength measured at a location behind the source to the wavelength measured at a location in front of the source is 1.50. If the wave speed is v, what is the source speed $v_s$?

参考答案:    

标记此题
4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  02.47: A car heads towaysvo7l8 kh . e )0 ss)u3 rhojpcho*(bb6l2ka)rd a brick wall in a crash test at 30 m/s. The horn is emitting a sound with frequency 250 Hz as it approaches the wall. If the air is sto()o b b.8 l02ys hs7ps)el3kvahku6)*hro jcill and the speed of sound in air is 340 m/s, what beat frequency from the horn would the driver of the car detect?

参考答案:    

  • :
  • 总分:4分 及格:2.4分 时间:不限时
    未答题: 已答题:0 答错题:
    当前第 题,此次习题练习共有 4 道题
    本系统支持习题练习,作业与考试三大模式,作业考试自动评分,成绩排序一键导出,可设定动态变量同一试卷千人千题
    如果您对本系统感兴趣,想加入我们或者想进行任何形式的合作,请加微信 skysky1258

    浏览记录|手机版首页|使用帮助|题库网 (https://tiku.one)

    GMT+8, 2025-7-11 16:28 , Processed in 0.068197 second(s), 30 queries , Redis On.