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Physics Help HERE ONLY !!

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Eamyzz:

--- Quote from: Guthixol on June 03, 2009, 05:24:17 pm ---hey its not me whos - reping you :P i increased the person who helped me :D thank you

i got anohter quesiton  :P same paper 2008 oct nov q3 all of it xP really sorry

thanks

--- End quote ---



thats nt helpful...learn 4rm me +rep any1 u fynd wid low rep  :D (A)

Ghost Of Highbury:
lol..it k...no need to be sry

okk heres ur answer
ai) pressure of a liquid = 10 * h * d(density of water)
                                = 10 * 70 * a050 = 7.35 * 10^5
ii) total pressure = pressure of water + atmospheric pressure => 735000 + 100000 = 835000
b) pressure = force / area
force = pressure * area
 = 6.5 * 10^5 * 2.5 = 1625000N
c) as density is directly proportional to the pressure, the pressure on the submarine is less because the density of freseh water is less..

hope that helped

Shogun:
alright lemme check tht no ke question..

Ghost Of Highbury:

--- Quote from: Guthixol on June 03, 2009, 05:24:17 pm ---hey its not me whos - reping you :P i increased the person who helped me :D thank you

i got anohter quesiton  :P same paper 2008 oct nov q3 all of it xP really sorry

thanks

--- End quote ---

answered ur question..
scroll up
 :D

Shogun:
lol, wierd, i think its cuz- not all energy is transformed to k.e, i dont think this goes like tht law of cnservation of falling bodies (where at falling ,some of it is ke and some of it is pe.)

cuz the question says "the energy transoformations" and the mark scheme avoids by saying tht the whole pe was changed to something, as it only said transformed or decreased...

and heat is a must, as heat is lost due to friction, as any waste enrgy is lost mostly by heat.

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