Physics: Post your doubts here!

[Shuddho Ukil]

Could really use some help here with this question!

'' A hard ball and a soft ball, with equal masses and volumes, are thrown at a glass
window. The balls hit the window at the same speed. Suggest why the hard ball is more
likely than the soft ball to break the glass window. ''

 

[Thought blocker]

Could really use some help here with this question!

'' A hard ball and a soft ball, with equal masses and volumes, are thrown at a glass
window. The balls hit the window at the same speed. Suggest why the hard ball is more
likely than the soft ball to break the glass window. ''

http://physics-ref.blogspot.in/2015/01/physics-9702-doubts-help-page-48.html
See Q two eighty eight

 

[Djlucifer]

um..............I am giving my AS level in May/June 2017 session and now I have around 50 days in my hand and what do I do to get most of the marks as in an A and how do I plan my revision time

 

[OmarKhan99]

9702_s15_qp_41, Question 12(c)(i)

Can someone tell me how to solve this question? I tried my method, but it's way off the MS.
Thanks in Advance.

 

[alevel_student]

Can someone solve b iv) and explain how to do it

 

[DragonCub]

Can someone solve b iv) and explain how to do it

 

[i_try9621]

um..............I am giving my AS level in May/June 2017 session and now I have around 50 days in my hand and what do I do to get most of the marks as in an A and how do I plan my revision time

Do a lot of past papers. That's how I revise usually and definitely read the notes.

 

[i_try9621]

Q5 b) ii) from 41/O/N/15

 

[Djlucifer]

what else any specific tips about practical as in manipulation in results

 

[areeba240]

(iii)

 

[Thought blocker]

View attachment 61794
(iii)

18000Hz ?

 

[areeba240]

18000Hz ?

yes but how?

 

[areeba240]

9702/41/O/N/13
qtn 11 (a) & (c)
can someone plzz explain

 

[Thought blocker]

yes but how?

918000-900000

 

[Thought blocker]

9702/41/O/N/13
qtn 11 (a) & (c)
can someone plzz explain

part(a)

(c) No Idea. This chapter, I sucked at it xD

 

[DragonCub]

View attachment 61794
(iii)

Shouldn't it be 9000 Hz? The signal bandwidth is 18 kHz; the audio bandwidth is half of that, which means 9 kHz or 9000 Hz.

Audio (or message) bandwidth is the same as maximum frequency of the audio (or message) signal.

 

[Thought blocker]

Shouldn't it be 9000 Hz? The signal bandwidth is 18 kHz; the audio bandwidth is half of that, which means 9 kHz or 9000 Hz.

Audio (or message) bandwidth is the same as maximum frequency of the audio (or message) signal.

Yes. xD I answered part (ii) xD

M sorry.

 

[AnonymousX9]

Hey guys could someone please help me with M/J 2009 P4 q9 part (b). Really confused. Thanks a lot.

 

[areeba240]

qtn 5(b)

 

[i_try9621]

9702/41/O/N/13
qtn 11 (a) & (c)
can someone plzz explain

For this if you look at the samples taken you see that some peaks get lost (between 0.25ms and 0.50ms & between 1.00ms and 1.25ms) which we don't want. So there is a significant change in voltage measured and the sampling frequency(or sampling rate) is too low.