Recent content by Dreams2Knight

  1. D

    Discover the Frequency of an Echo Using the Doppler Effect - Solved!

    Ah, I see my mistake now. Thanks so much for your help. I really appreciate it.
  2. D

    Discover the Frequency of an Echo Using the Doppler Effect - Solved!

    Ok, so if I understand correctly, I need to set my equation up like this: 20.234=f(2)*[(345+4)/345]. This gives me 20.00209. I confused myself at this point because when I put the numbers into my calculator, I accidently subtracted 4 from 345 instead of adding. Doing that gave me the...
  3. D

    Discover the Frequency of an Echo Using the Doppler Effect - Solved!

    Hello, Thank you for replying. Source: Bat Observer: Wall For the first equation I have f(1)=20[345/(345-4)] which is 20.23460411 kHz Source: Wall Observer: Bat For the second equation I have f(1)=20[(345+4)/345] which is 20.23188406 kHz Are my equations correct? If so...
  4. D

    Discover the Frequency of an Echo Using the Doppler Effect - Solved!

    [SOLVED] Doppler Effect? Homework Statement A bat flying at 4.0 m/s emits a chirp at 20 kHz. If this sound pulse is reflected by a wall, what is the frequency of the echo received by the bat? Homework Equations Not sure. Do I use the f(1)=f*[(v+/-observer velocity)/(v+/-source...
  5. D

    Solving a Vector Problem: Find Magnitude & Direction

    Ah, well that was the problem. I didn't use the negative. I now have the correct answer! Something so simple caused me so much grief. Thank you for bringing that to my attention. I sure appreciate the help.
  6. D

    Solving a Vector Problem: Find Magnitude & Direction

    Urgh. I'm STILL getting the same answer. I've done all I can do tonight. I've got to sleep. I'll work on this again tomorrow.
  7. D

    Solving a Vector Problem: Find Magnitude & Direction

    Oh my god, I don't know why I thought the 25 degrees had to measured from the 180 degree line! :redface: My mind is so confused, I guess I just got it turned around with another problem I was doing. Some of the other problems I'm doing do give you the angle from the 180 degree line. I"m...
  8. D

    Solving a Vector Problem: Find Magnitude & Direction

    [SOLVED] Vector Problem I hope someone can help me. I am so tired of trying to figure this out. A man pushing a mop across a floor causes the map to undergo two displacements. The first has a magnitude of 110 cm and makes an angle of 110° with the positive x axis. The resultant displacement...
Back
Top