Physics: Post your doubts here!

[Catherine_1]

Please explain.

 

[Konstantino Nikolas]

Thanks once again. I know that acceleration of the log while traveling up an down the slope will be different. What I to meant to ask was, why are the accelerations different when traveling down the slope? In other words, why are the gradients of the red and yellow line different. Shouldn't it be a straight line?
View attachment 59484

red line does NOT depict log going down ... the log is still going up but with DECREASING velocity (negative gradient = deceleration) ... so until the red line gets over, the velocity is still positive as log is in upward motion. When log comes down, velocity is negative (yellow line). So now read that explanation again to understand why the magnitudes of acceleration of red and yellow lines are different.
You have misunderstood the motion of the log ... just focus and try to imagine the motion of the log ... read the explanation and you will hopefully get it.

 

[Catherine_1]

Please help, anyone?

 

[holoholo]

How do you answer this ?

 

[OmarKhan99]

red line does NOT depict log going down ... the log is still going up but with DECREASING velocity (negative gradient = deceleration) ... so until the red line gets over, the velocity is still positive as log is in upward motion. When log comes down, velocity is negative (yellow line). So now read that explanation again to understand why the magnitudes of acceleration of red and yellow lines are different.
You have misunderstood the motion of the log ... just focus and try to imagine the motion of the log ... read the explanation and you will hopefully get it.

Ohhhh!!! I GET IT!! Thanks a million bro!

 

[Konstantino Nikolas]

Ohhhh!!! I GET IT!! Thanks a million bro!

Good. No problem!

 

[Unsa Khan]

I can't actually find that objective in the syllabus but this is what it should be:
When a wave passes through a gap the diffraction effect is greatest when the width of the gap is about the same size as the wavelength of the wave

This objective is from IGCSE physics syllabus

 

[nehaoscar]

This objective is from IGCSE physics syllabus

Oh ok

 

[Unsa Khan]

Oh ok

is this thread for Alevel physics ?

 

[nehaoscar]

is this thread for Alevel physics ?

Yeah IGCSE is over here: https://www.xtremepapers.com/commun...stry-and-biology-post-your-doubts-here.11053/

 

[Sunit Saha]

Hey guys! I wanted to ask that do you guys have any idea where I can get the sample paper of May/June 2016 for As level physics?

 

[My Name]

Hey guys! I wanted to ask that do you guys have any idea where I can get the sample paper of May/June 2016 for As level physics?

The specimen paper is here:
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/
Last links where it says y-2016 sp and sm.
Okay?

 

[Sunit Saha]

The specimen paper is here:
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Physics (9702)/
Last links where it says y-2016 sp and sm.
Okay?

Thank you so much. Just one more favour. Can u please send me the link of chemistry specimen papers also as I am unable to find them.

 

[My Name]

thank you soo much. just one more favour i am unable to find the chem spe

Thank you so much. Just one more favour. Can u please send me the link of chemistry specimen papers also as I am unable to find them.

Welcome.
Okay.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/
In the end here also.
You can get teh 2015 O/N session papers here:http://www.gceguide.com/past-papers/a-levels/

 

[Unsa Khan]

Yeah IGCSE is over here: https://www.xtremepapers.com/commun...stry-and-biology-post-your-doubts-here.11053/

oh okay thanks !!

 

[Catherine_1]

For the P3 mark can anyone pleeeeaaasee explain
1. is it that Turns of Y or turns of X important is for induced emf in this case and why?

Any reasoning for point 7 and 8? Also could anyone explain the diagram arrangement of coil X and Y, like would it be arranged in opposite manner or same side?


1. Also, in paper 5 to change the frequency of the alternating current on any coil how is it done?
One paper had this has the marking scheme:
Marking scheme -->
(Variable frequency AC power supply or signal generator (method of varying frequency).

2. So like, What is the basic difference between the two methods?

Pleaseee do help!

Marking scheme (Variable frequency AC power supply or signal generator (method of varying frequency).

 

[The Sarcastic Retard]

View attachment 59532
View attachment 59533

For the P3 mark can anyone pleeeeaaasee explain
1. is it that Turns of Y or turns of X important is for induced emf in this case and why?
View attachment 59534
Any reasoning for point 7 and 8? Also could anyone explain the diagram arrangement of coil X and Y, like would it be arranged in opposite manner or same side?


1. Also, in paper 5 to change the frequency of the alternating current on any coil how is it done?
One paper had this has the marking scheme:
Marking scheme -->
(Variable frequency AC power supply or signal generator (method of varying frequency).

2. So like, What is the basic difference between the two methods?

Pleaseee do help!

Marking scheme (Variable frequency AC power supply or signal generator (method of varying frequency).

Paper 5??

 

[nehaoscar]

P5 - S15 - 51
Last question
log k = y intercept


Can anyone explain how it results in the final equation of 1/2(maxk-mink)/k ??
Like % uncertainty is just [(change in k)/k ]*100 so how to get all the 1/2 and stuff??
And also is there another way to do it??

 

[The Sarcastic Retard]

Is paper 5 difficult?

 

[Konstantino Nikolas]

Is paper 5 difficult?

Pretty easy actually ... i mean compared to paper 4 it is really easy.