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ALL CIE PHYSICS DOUBTS HERE !!!

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Dania:

--- Quote from: TJ-56 on November 14, 2010, 11:02:27 am ---21

Since the total pressure is 17.5 MPa:
17*10^6 = Pressure exerted by oil +Pressure exerted by water
              = 830*9.81*x + 1000*9.81*(2000-x)
Solving for x would give 1270m
And hence the answer is D



--- End quote ---

Thanks! :)

TJ-56:
Oh sorry, i mistyped it, was typing in a hurry,
Yeah the answer is A, where there is a y-intersection

Dania:
I NEVER get these questions about phase difference.
Can someone please explain to me why the answer is C?

$!$RatJumper$!$:

--- Quote from: Hypernova on November 14, 2010, 10:31:43 am ---25)

nlamda=dsin@


maximum order= d / lamda

3lamda=dsin45

d / lamda = 3 / sin45


maximum order= 4.24
             so 4

ans is B

--- End quote ---

Thank you! :)


--- Quote from: TJ-56 on November 14, 2010, 11:07:54 am ---Oh sorry, i mistyped it, was typing in a hurry,
Yeah the answer is A, where there is a y-intersection

--- End quote ---

Makes sense. thankx! :)

Dania:
Why is the answer A?

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