Physics: Post your doubts here!

[x-gamer-x]

 

[Lama AN]

Can someone give me the answer of the end of chapter questions in the physics text book for Momentum and Deformation of solids chapters ?
I just need to compare my answers with others since we dont have the answer key in the students edition

 

[hino]

View attachment 33394

gravitational potential=GM/r
change in gravitational potential=GM/r-GM/R where R=radius of the earth + the altitude(this altitude is from the surface of the earth and not from the center) R=6400+13000=1.94*10^4
=GM(1/r-1/R) (have taken GM as common)
= (6.67 × 10-11)(6.0 x 1024)*1/(6.4 x 10^6)-1/(1.94 x 10^7) (DONT FORGET TO CONVERT km to m)
= 4.19 x 107 J kg-1 Ans

 

[x-gamer-x]

gravitational potential=GM/r
change in gravitational potential=GM/r-GM/R where R=radius of the earth + the altitude(this altitude is from the surface of the earth and not from the center) R=6400+13000=1.94*10^4
=GM(1/r-1/R) (have taken GM as common)
= (6.67 × 10-11)(6.0 x 1024)*1/(6.4 x 10^6)-1/(1.94 x 10^7) (DONT FORGET TO CONVERT km to m)
= 4.19 x 107 J kg-1 Ans

i just forgot to convert km to m
thank u

 

[hino]

you

i just forgot to convert km to m
thank u

your welcome

 

[hela]

HOW TO SOLVE http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_41.pdf
WINTER 2010 Q 2b iii

 

[hela]

how to solve http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s10_qp_41.pdf

question 4 b ii

 

[mshabir007]

i would like to get some help from my MCQ Paper which i did this year may june 9702/mj/13/q11
question paper 11
please help me to solve this questions
here are the questions 6,8,17,18,19,21,24,27,32,35 thank you

 

[mshabir007]

i would like to get some help from my MCQ Paper which i did this year may june 9702/mj/13/q11
question paper 11
please help me to solve this questions
here are the questions 6,8,17,18,19,21,24,27,32,35 thank you

 

[white ash]

any tips on acing your first physics AS EXAM at school?IM JUST TOO NERVOUS..

 

[hela]

HOW TO SOLVE http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w10_qp_41.pdf
WINTER 2010 Q 2b iii

 

[Starlight97]

Could any of you plz provide me the name of phys book for As and A

 

[Suchal Riaz]

Could any of you plz provide me the name of phys book for As and A

Cambridge Internation A/As level Physics Coursebook by Cambridge University press

 

[Suchal Riaz]

Could any of you plz provide me the name of phys book for As and A

Cambridge Internation A/As level Physics Coursebook by Cambridge University press

 

[arsalanlaiqkhan]

i need compiled past papers of paper 5??

 

[Rrrrrr]

hello, is there any website like www.chemguideforcie.co.uk for physics ?

 

[jhon134]

How to solve this please help

 

[IGCSE O/L student]

How to solve this please help

Since the forces are all in equilibrium, the upward force must be equal to the downward force. So the vertical component of T must be equal to 5*9.81
So Tsin(60)=5*9.81
Find T by making it the subject.
Since the two forces acting horizontally are F and the horizontal component, and because they are both in different directions, they should be equal in magnitude. So Tcos(60)=F

For the next question, 2Tcos(30)=10*9.81

Find T

 

[richard_dell32]

Hi, can anyone please help me take a look at this Physics question from the picture attached:​

​

It is regarding AC transmission involving voltage supplied and power used.​

​

Any explanation is very appreciated, Thank you very much!​

 

[sj0007]

Can anybody plz help me wid QUESTION 12 of this paper the answer is A......and also wid QUeSTION 15 whose answer is D....

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_11.pdf

 

[sj0007]

Also question number 13 and 14 of http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_s12_qp_12.pdf
whose answers are A and B respectively....