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physics help needed

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yinyang:
Can anyone please solve these two questions

june 2009
Q 14
Q 15
 ??? ???

T.Q:
edexcel or cie

and which paper ??

yinyang:
it's cie  paper 1 sorry for not mentioning earlier  :D

astarmathsandphysics:
Will try when i get home

astarmathsandphysics:
14. P=Fv
F=kv^2 so P=kv^3 C
15 the water in the top half may be considered to go into vessel Y, falling average height h/2 in the process so loss of GPE=mgh/2 C
1

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