Physics Help HERE ONLY !!

[Ghost Of Highbury]

lol guyz.....i ll +rep all u guyz but seriously i thnk itz more imp dat v ans pplz doubts here.... ......dont u thnk so?

agree
thanks for the rep
 

[Eamyzz]

HAHHAHAHAHHAHAH...priceless am searching 4 da question i will solve it n then post it

[Priceless]

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  

[Shogun]

Thanks priceless, and Thanks for the +rep

[Priceless]

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

@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!  

[Priceless]

@shogun:  du u no y v cant say k.e 4 dat ques....plz help  ...thnku in advance

[Ghost Of Highbury]

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..

[Eamyzz]

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

[Eamyzz]

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

@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

[Guthixol]

hey its not me whos - reping you i increased the person who helped me thank you

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

thanks

[Eamyzz]

hey its not me whos - reping you i increased the person who helped me thank you

i got anohter quesiton   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  (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]

hey its not me whos - reping you i increased the person who helped me thank you

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

thanks

answered ur question..
scroll up
 

[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.