Physics: Post your doubts here!

[haithsoul]

I wrote this :
THE LINES ARE RADIAL AND PERPENDICULAR TO THE SURFACE OF THE EARTH
g= GM/ ( R + h ) ^ 2..
h is extremely small compared to the Radius of the Earth
So, g is approximately constant

line are PARALLEL near survace

 

[Tauqir_hamed]

yh it should be
one mark must be for writing change in gpe = change in ke
and then for proving it to be 2.4 and writing wut u wrote = 3 marks
if u wrote the formula yes u got all 4

Was the question of 4 marks ??

 

[anastasia grey113]

i think even after such intense discussion, our marks haven't dropped below 80 so it's all good i guess.

yh true xDD
i hope thaz the most v lose
nothing more than that

 

[anastasia grey113]

line are PARALLEL near survace

yh i wrote this

 

[Tauqir_hamed]

line are PARALLEL near survace

well they are perpendicular to the surface

 

[anastasia grey113]

Was the question of 4 marks ??

yh

 

[haithsoul]

man i hope i get high 80s thank god bio was easy

 

[anastasia grey113]

well they are perpendicular to the surface

yes but that is the case for all spherical objects
doesnt qualify for explaining large radius

 

[Zaki ali asghar]

changes in height much less than radius of Earth

M1 A1

so (radial) field lines are almost parallel

or

g=GM/R2 ≈GM/(R+h)2
this is what's worth for 2 marks in mark scheme

 

[anastasia grey113]

man i hope i get high 80s thank god bio was easy

lol yh same

 

[anastasia grey113]

changes in height much less than radius of Earth

M1 A1

so (radial) field lines are almost parallel

or

g=GM/R2 ≈GM/(R+h)2
this is what's worth for 2 marks in mark scheme

well so m defo getting 2
dk abt the 3rd mark tho

 

[Tauqir_hamed]

will I get an A* if I get the following scores:
(31/40 ), (52/60 ) , ( 25/ 30 ) , ( 84/ 100 ) , ( 23/30 )
or will paper 4's high threshold be an issue :/. if it turns out to be higher than 60 ..

 

[fatima_jawed]

y'all
i'm a P2 student and i'm flipping out looking at all you P4 kids
Is there anyone who got their hands on the Feb March 2018 series papers?

 

[Zaki ali asghar]

yh, that's an easy A*

 

[anastasia grey113]

will I get an A* if I get the following scores:
(31/40 ), (52/60 ) , ( 25/ 30 ) , ( 81/ 100 ) , ( 23/30 )
or will paper 4's high threshold be an issue :/. if it turns out to be higher than 60 ..

lol who says itll be high?

 

[anastasia grey113]

y'all
i'm a P2 student and i'm flipping out looking at all you P4 kids
Is there anyone who got their hands on the Feb March 2018 series papers?

nope
wont be released b4 17th of May

 

[anastasia grey113]

in that

ohh
also, in the specific heat capacity question, i think ive messed that up a bit.
Will I get a mark if I state the formula Q = ML

idk
it only had 2 marks
i dont think this will get u a mark

 

[anastasia grey113]

oh one last qs
wut did u guys write for the last part?
why is the intermediate nucleus so less?

 

[fatima_jawed]

nope
wont be released b4 17th of May

ah okay thanks mate <3

 

[haithsoul]

oh one last qs
wut did u guys write for the last part?
why is the intermediate nucleus so less?

because the decay constant is big so unstable