Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -

where's the plane?


Best Answer k-man, 21 February 2013 - 09:28 PM

Spoiler for my take
Go to the full post


  • Please log in to reply
4 replies to this topic

#1 BMAD

BMAD

    Senior Member

  • Members
  • PipPipPipPip
  • 1702 posts
  • Gender:Female

Posted 21 February 2013 - 09:23 AM

Michelle, john, and Kiru are all outside at the time a Jet is observed in the sky. Kiru hears the Jet's sonic boom two seconds before Michelle and seven seconds before John. if you were to draw a line to connect their locations they would form a triangle. Michelle is 10000 feet from Kiru. Kiru is 15000 ft from John. And John is 6000 ft from Michelle. Find a formula to derive the possible locations of where the sonic boom originated.

Spoiler for If it helps

  • 0

#2 bonanova

bonanova

    bonanova

  • Moderator
  • PipPipPipPip
  • 5918 posts
  • Gender:Male
  • Location:New York

Posted 21 February 2013 - 08:09 PM

Are you taking into account that a sonic boom sweeps along the ground at the speed of the plane that generates it? Or are we to assume the sound originates from a fixed point and propagates at its native speed?


  • 0
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#3 Rob_Gandy

Rob_Gandy

    Advanced Member

  • Members
  • PipPipPip
  • 175 posts
  • Gender:Male
  • Location:Garland, TX

Posted 21 February 2013 - 08:23 PM

No clue about how to come up with a formula, but I did draw it out.

Spoiler for If I'm not mistaken

Spoiler for Image

Spoiler for Explanation

 

 

I didn't really think about the height of the plane though....oops

Edit:bad tags


Edited by Rob_Gandy, 21 February 2013 - 08:26 PM.

  • 0

#4 k-man

k-man

    Advanced Member

  • Members
  • PipPipPip
  • 481 posts
  • Gender:Male

Posted 21 February 2013 - 09:28 PM   Best Answer

Spoiler for my take

  • 0

#5 BMAD

BMAD

    Senior Member

  • Members
  • PipPipPipPip
  • 1702 posts
  • Gender:Female

Posted 22 February 2013 - 03:31 AM

Are you taking into account that a sonic boom sweeps along the ground at the speed of the plane that generates it? Or are we to assume the sound originates from a fixed point and propagates at its native speed?

 

for the sake of simplicity and hopefully so i can actually declare a right answer, let's assume it originates from a fixed point.


  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users