Author Topic: Physics Help HERE ONLY !!  (Read 81849 times)

Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #555 on: June 03, 2009, 05:09:07 pm »
lol guyz.....i ll +rep all u guyz but seriously i thnk itz more imp dat v ans pplz doubts here.... :P......dont u thnk so?



agree
thanks for the rep
 :D
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Offline Eamyzz

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Re: Physics Help HERE ONLY !!
« Reply #556 on: June 03, 2009, 05:11:13 pm »
HAHHAHAHAHHAHAH...priceless am searching 4 da question i will solve it n then post it ;D
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Offline Priceless

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Re: Physics Help HERE ONLY !!
« Reply #557 on: June 03, 2009, 05:12:35 pm »
Guys what is the difference b/w Flemings Left and right hand rule? when do you use each?

this is confusing but da diff is dat u use flemings right-hand rule wen u hv an induced current......just remb if ders a battery present ders no induced current so use left-hand rule but if der isnt a battery...den use da right-hand rule..

i hope u get it....all da best evry1  ;)
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Offline Shogun

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Re: Physics Help HERE ONLY !!
« Reply #558 on: June 03, 2009, 05:15:22 pm »
Thanks priceless, and Thanks for the +rep
one who masters both the pen and paper is indeed a true warrior.

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Offline Priceless

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Re: Physics Help HERE ONLY !!
« Reply #559 on: June 03, 2009, 05:18:41 pm »
Hey everyone!
Can someone help me with question 3 (b) June 07?
Why can't GPE be converted to kinetic energy and how does it get converted to heat?

the potential energy decreases as it changes to kinetic energy and heat energy...



@adi:   thnkz adi....n no need 4 thnkz  ;) ....By the way adi dat wz clem's ques....actualy in da MS dey say dat u cant rite k.e...dey say all da p.e converts in2 heat energy....which i didnt evn understnd y ???...plzz help....thnkz in advance

@eamyzz: lol oh ok :D

@shogun: guyz plz no need 4 thnkz...v r helping each other here...ders absolutely no need 4 thnku...ok...Take care

all da best ppl!  :)
Don't say "God I have tooo many problems" but say "Problems I have God!"   Gud Luck 2 all 4 xams. Hope v all du well.....fingers crossed LOL

Offline Priceless

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Re: Physics Help HERE ONLY !!
« Reply #560 on: June 03, 2009, 05:19:32 pm »
@shogun:  du u no y v cant say k.e 4 dat ques....plz help  :)...thnku in advance
Don't say "God I have tooo many problems" but say "Problems I have God!"   Gud Luck 2 all 4 xams. Hope v all du well.....fingers crossed LOL

Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #561 on: June 03, 2009, 05:20:23 pm »
yeahh i know
i saw the markscheme

in these types of wierd questions
u need to be a little smart

wat u do is write all the possibilities like sound, heat, KE...etc..

they will ignore the ones not required and give u a mark for heat
!!!
 :)
wierd examiners,,,lol..
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Offline Eamyzz

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Re: Physics Help HERE ONLY !!
« Reply #562 on: June 03, 2009, 05:21:17 pm »
Guys what is the difference b/w Flemings Left and right hand rule? when do you use each?

this is confusing but da diff is dat u use flemings right-hand rule wen u hv an induced current......just remb if ders a battery present ders no induced current so use left-hand rule but if der isnt a battery...den use da right-hand rule..

i hope u get it....all da best evry1  ;)


may u plz elaborate it more****BLUSH***
but thnk yu
Live=Hope
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So,No life=No hope=DEATH
am alive =D

Offline Eamyzz

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Re: Physics Help HERE ONLY !!
« Reply #563 on: June 03, 2009, 05:23:35 pm »
Hey everyone!
Can someone help me with question 3 (b) June 07?
Why can't GPE be converted to kinetic energy and how does it get converted to heat?

the potential energy decreases as it changes to kinetic energy and heat energy...



@adi:   thnkz adi....n no need 4 thnkz  ;) ....By the way adi dat wz clem's ques....actualy in da MS dey say dat u cant rite k.e...dey say all da p.e converts in2 heat energy....which i didnt evn understnd y ???...plzz help....thnkz in advance

@eamyzz: lol oh ok :D

@shogun: guyz plz no need 4 thnkz...v r helping each other here...ders absolutely no need 4 thnku...ok...Take care

all da best ppl!  :)



look it will b lost as heat due to da friction between da foot and da stairs it may also b lost as sound but mainly heat....hope it helped :)
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So,No life=No hope=DEATH
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Offline Guthixol

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Re: Physics Help HERE ONLY !!
« Reply #564 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
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Offline Eamyzz

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Re: Physics Help HERE ONLY !!
« Reply #565 on: June 03, 2009, 05:26:58 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



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

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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #566 on: June 03, 2009, 05:29:04 pm »
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
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Offline Shogun

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Re: Physics Help HERE ONLY !!
« Reply #567 on: June 03, 2009, 05:29:46 pm »
alright lemme check tht no ke question..
one who masters both the pen and paper is indeed a true warrior.

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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #568 on: June 03, 2009, 05:30:34 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

answered ur question..
scroll up
 :D
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Offline Shogun

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Re: Physics Help HERE ONLY !!
« Reply #569 on: June 03, 2009, 05:33:45 pm »
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.
one who masters both the pen and paper is indeed a true warrior.

\m/metal head\m/