Physics: Post your doubts here!

[doremon]

who is in which zone?

 

[Haya Ahmed]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_23.pdf

Q2b

 

[Mohammed salik]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_23.pdf
Q5 c)ii) ?????????????????? Plz Suchal Riaz

 

[Suchal Riaz]

I just did fag -_-

avoid using abusive words such as fag again. if you solved and he didn't get then it doesn't mean you will get rude to him. and the way you explained no one would get it. read the terms and rules of this forum: https://www.xtremepapers.com/community/help/terms

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_w12_qp_23.pdf

Q2b

please explain him that question in which i tagged you then i will answer your doubt.

 

[Snowysangel]

Okay here's a questio!
A beam of alpha particles produces a current of 1.5 pA. Calculate the number of alpha particles per second passing a point in the beam. And please explain as well

 

[Haya Ahmed]

new wave will be straight line.
Haya Ahmed please give him the pictures and animation which i gave you yesterday and explain it to him how i explained it to you. i have to solve many other doubts.

in 1/4 cycle antinode gets from highest point to zero. then in 1/4 it gets to lowest point then in 1/4 it gets to zero. then in 1/4 it gets back to max. so in one T it completes on cycle.


here is Suchal explanation
https://www.xtremepapers.com/commun...st-your-doubts-here.9860/page-440#post-782703
Physics: Post your doubts here!

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_23.pdf
Q5 c)ii) ?????????????????? Plz Suchal Riaz

energy is directly proportional to square of extension. if E is half, then extension is 1/√2 of max extension = 2.6/√2 = 1.84

 

[Haya Ahmed]

please explain him that question in which i tagged you then i will answer your doubt.

Done .. now answer 2b ASAP ! :/

 

[Suchal Riaz]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s13_qp_22.pdf

guys how are we suppose to do q 5part b iii i dont get how we r suppose to draw the new wave

https://www.xtremepapers.com/commun...st-your-doubts-here.9860/page-451#post-784558

 

[Suchal Riaz]

Done .. now answer 2b ASAP ! :/

by conservation of energy the height of mass will be the same.
the height at A is 0.26
so height at second plank will be 0.26 m
height is 0.26, angle is 30 so the length = 0.26/sin30

 

[doremon]

Suchal Riaz do you think tomorrow's exam will be hard? and i am sorry for cussing

 

[Suchal Riaz]

Okay here's a questio!
A beam of alpha particles produces a current of 1.5 pA. Calculate the number of alpha particles per second passing a point in the beam. And please explain as well

current = charge/time
charge of an alpha particle = +4e
number of alph particle = n
total charge = n4e
current = 1.5 x 10 -12
so 1.5 x 10 -12 = 4ne/1 second
n=(1.5 x 10 -12)/4e = (1.5 x 10 -12)/4(1.6x10 -19) = 2.34 X 10 6

 

[Reddah Nadeem]

Heeyy guys can anyone lemme noe how to solve oct nov 5 question 3.c...Please..

 

[Suchal Riaz]

Suchal Riaz do you think tomorrow's exam will be hard? and i am sorry for cussing

idk the 2013 papers were easy as well as P1 of this year. but chemistry was different. and mechanics was difficult too. but i still hope it is easy.

 

[Suchal Riaz]

Heeyy guys can anyone lemme noe how to solve oct nov 5 question 3.c...Please..

post link. everyone posts link to get their question answered.

 

[doremon]

current = charge/time
charge of an alpha particle = +4e
number of alph particle = n
total charge = n4e
current = 1.5 x 10 -12
so 1.5 x 10 -12 = 4ne/1 second
n=(1.5 x 10 -12)/4e = (1.5 x 10 -12)/4(1.6x10 -19) = 2.34 X 10 6

I think you are wrong. charge of an alpha particle is +2 not +4!!!!!!!!!!!!!!!!!!!

 

[mehria]

http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w10_qp_22.pdf
Q4 (a) n (b) :/

 

[doremon]

mechanics was fudged up man

post link. everyone posts link to get their question answered.

 

[Haya Ahmed]

Physcis Revision Notes ! .. Read them and Please pray for me