Thursday, July 29, 2010

Finding height of a room having a hanging bulb

Puzzle:
How would you find the height of room if after entering the room with a stop-watch you find there is a hanging bulb that just grazes your head ?

Answer
You can apply knowledge of physics here. Just oscillate the hanging bulb. Measure the time period for one complete. Since this would be a Simple Harmonic Motion, you can use the formula T=2 * 3.14 * (L/G)^1/2.
Thus, L will be the length of the hanging thread.
Now you can add your height to L , to find the height of the room.

5 comments:

  1. Abe harami kahan se chep raha hai yeh puzzles. Kuch toh sharam kar...

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  2. well mr Anonymous1 i think this guys done a pretty much gud job.... agar chepa hai to its only the question... im glad for once i found answers along with such high tech questions...

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  3. It is requested to everyone, not to use abusive languages to anyone. Like or dislike. Or give in ur feedback to make the site better and helpful to everyone.

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  4. hey anwar u have really done a good job.

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