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Step by StepStep-By-Step

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pls help me with an working model tat can be made in one or two days.below are the given topics on which i need projects

1.climate change      (2)green energy  (3)conservation of energy..  (4)disaster management...  (5)health   (6)food security

3 answers
Aug 27, 2011. 1:05 PMrickharris says:
1 do your preparation WHEN the task is set.
2. Don't expect others to bale you out of a hole all the time
3. THINK and research
4. Well done on not just giving up but asking for help

Kiteman has already given you an answer - Make a scale so you can prove he ball never gets to the same height.
Aug 27, 2011. 1:00 PMRedneckEngineer says:
Yep school's back in. Do a search. If you can't find it on this site try Google.
Aug 27, 2011. 12:40 PMKiteman says:
The easiest is (3) - drop a bouncy ball, and it will never, ever, return to the same height from which you drop it.

[/homework help]

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