Physics: Post your doubts here!

[scarface007]

hey can anyone pls explain me how to find uncertainty?

 

[asd]

If we increase the intensity of ones of the slits in a double slit experiment while the other remains constant.. both the dark and bright fringes will become brighter yeah?

Yup.

 

[TaffsAsLevel]

Constuctive where they intersect, and destructive just draw a line through where one of the waves' wavefronts are exactly in between the wavefronts of the other.
) . ) Like this if you get it lol

wait I don't get the destructive part, is it OX then? Sorry but where is the wavefronts really, I am pretty weak in waves =P

 

[soul]

hey can someone please tell me to how many significant figures should we give the answer

 

[A star]

hey can someone please tell me to how many significant figures should we give the answer

cie never make up their mind but make sure its two or three some they allow both wrna they allow only one of them but they should be consistant throughout question

 

[asd]

wait I don't get the destructive part, is it OX then? Sorry but where is the wavefronts really, I am pretty weak in waves =P

 

[TaffsAsLevel]

hey can someone please tell me to how many significant figures should we give the answer

I think 2 sig. fig

 

[lee mee..]

Hey...... Can someone plz explain me how to do Q 5b of variant 1.
http://papers.xtremepapers.com/CIE/...and AS Level/Physics (9702)/9702_s09_qp_2.pdf

 

[TaffsAsLevel]

Oh so basically it is between the intersecting lines?

 

[TaffsAsLevel]

Hey...... Can someone plz explain me how to do Q 5b of variant 1.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_qp_2.pdf

I got this problem too earlier and got the solution from another forum, here https://www.xtremepapers.com/community/threads/help-needed-physics-as-9702.25237/

 

[asd]

Oh so basically it is between the intersecting lines?

Yeah.

 

[TaffsAsLevel]

Yeah.

<3 Daaaamn you solved all my problems, I hope you guys are there for A2 structured for the 22nd of May 2013, is there another forum for this?

 

[A star]

well godluck asd syed1995 daredevil and MustafaMotani others who i dont have the energy to tag

 

[daredevil]

hey can someone please tell me to how many significant figures should we give the answer

to be on the safe side keep it 3 s.f. as that is almost always the accepted.. and they might deduct marks for lesser no of significant figures but normally they don't penalize for more number of significant figures except in special cases like absolute errors or such stuff

 

[aleezay]

cie never make up their mind but make sure its two or three some they allow both wrna they allow only one of them but they should be consistant throughout question

You are to judge them by the no. of sig fig in the least count of the raw data (apart from any constants) no. of sf can either by equal to or one more than those of a value having the least no of sf in a calculation

 

[asd]

<3 Daaaamn you solved all my problems, I hope you guys are there for A2 structured for the 22nd of May 2013, is there another forum for this?

Its the same for A2
Its just that the A2 guys are busy studying
and Np bro.
A star good luck too man. and thanks

 

[A star]

You are to judge them by the no. of sig fig in the least count of the raw data (apart from any constants) no. of sf can either by equal to or one more than those of a value having the least no of sf in a calculation

yes but in the ms some times the raw data has variable sig some of two and some 3 . i become confused then

 

[TaffsAsLevel]

Its the same for A2
Its just that the A2 guys are busy studying
and Np bro.
A star good luck too man. and thanks

Alright then, I hope you all are there available. Thanks once again

 

[lee mee..]

I got this problem too earlier and got the solution from another forum, here https://www.xtremepapers.com/community/threads/help-needed-physics-as-9702.25237/

Thank you

 

[asd]

yes but in the ms some times the raw data has variable sig some of two and some 3 . i become confused then

I guess its the best to work in 3 sig fig, cause thats what we used to do in O levels atleast.

 

[syed1995]

yes but in the ms some times the raw data has variable sig some of two and some 3 . i become confused then

Take the least number of significant figures from the raw data.

do this

When raw data is in 3 and 4sf.

=13.65
≈13.7