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Author Topic: Edexcel PHYSICS Doubts  (Read 131997 times)

Offline Malak

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Re: Edexcel PHYSICS Doubts
« Reply #510 on: May 13, 2011, 06:33:23 pm »
Quote from: ~ The Golden Girl ~ on May 13, 2011, 06:24:43 pm
Which paper is this ?   :-\

Its a question from exam wizard
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Offline mustafa09

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Re: Edexcel PHYSICS Doubts
« Reply #511 on: May 13, 2011, 11:39:14 pm »
when the question is about stating the precautions, what should i do
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Offline Malak

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Re: Edexcel PHYSICS Doubts
« Reply #512 on: May 14, 2011, 12:01:59 am »
Q:
By reading from the frequency spectrum (figure 2) state the fundamental frequency of the note

Thx
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elemis

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Re: Edexcel PHYSICS Doubts
« Reply #513 on: May 14, 2011, 03:51:02 am »
I need the whole question.
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Offline The Golden Girl =D

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Re: Edexcel PHYSICS Doubts
« Reply #514 on: May 14, 2011, 05:41:13 am »
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elemis

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Re: Edexcel PHYSICS Doubts
« Reply #515 on: May 14, 2011, 07:30:31 am »
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Offline The Golden Girl =D

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Re: Edexcel PHYSICS Doubts
« Reply #516 on: May 14, 2011, 11:14:17 am »
I believe so.
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Offline red_911

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Re: Edexcel PHYSICS Doubts
« Reply #517 on: May 14, 2011, 03:49:44 pm »
hey i ve a important question
if there is a question like : using sonometer show that frequency of sound in inversely proportional to the length. what are the points that we will write ?  :o ...
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Offline mustafa09

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Re: Edexcel PHYSICS Doubts
« Reply #518 on: May 14, 2011, 06:05:18 pm »
physics unit 3 help needed
i need notes or something
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Offline The Golden Girl =D

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Re: Edexcel PHYSICS Doubts
« Reply #519 on: May 15, 2011, 08:06:26 am »
Quote from: mustafa09 on May 14, 2011, 06:05:18 pm
physics unit 3 help needed
i need notes or something


Check the last page for notes.

https://studentforums.biz/revison-notes/useful-websites/new/#new
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Offline The Golden Girl =D

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Re: Edexcel PHYSICS Doubts
« Reply #520 on: May 15, 2011, 08:22:46 am »
Quote from: red_911 on May 14, 2011, 03:49:44 pm
hey i ve a important question
if there is a question like : using sonometer show that frequency of sound in inversely proportional to the length. what are the points that we will write ?  :o ...

Check out Page 7 , here ;

http://physics.slss.ie/resources/downloads/ph_pr_soundexperiments.pdf

Check Notes attached , page 6.
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Offline deadlyelder

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Re: Edexcel PHYSICS Doubts
« Reply #521 on: May 15, 2011, 02:43:56 pm »
Hey,

I need to know how to get the answers for the Physics 3B International Question Number 3 and 9 (c) and (d) of the following document :

http://www.edexcel.com/migrationdocuments/GCE%20New%20GCE/Physics-Practical-Alternative-SAMs.pdf

I need to know the method not the answer. Hope Someone helps
« Last Edit: May 15, 2011, 02:47:34 pm by deadlyelder »
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Offline Malak

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Re: Edexcel PHYSICS Doubts
« Reply #522 on: May 15, 2011, 03:36:35 pm »
Quote from: deadlyelder on May 15, 2011, 02:43:56 pm
Hey,

I need to know how to get the answers for the Physics 3B International Question Number 3 and 9 (c) and (d) of the following document :

http://www.edexcel.com/migrationdocuments/GCE%20New%20GCE/Physics-Practical-Alternative-SAMs.pdf

I need to know the method not the answer. Hope Someone helps

For Q3:
Each small line is 40 Hz and the lowest frequency is the the first line on the graph therefore if you count them until the first frequency line, you will get 440 Hz

Q9 c:
Eq. of a straight line is the form y = mx + c

You know that the graph is of s/t for y-axis and t for x-axis
Therefore your y = s/t and you know that s/t is speed therefore y = v

So eq. will be like:

s = ut + 1/2at2
Dividing by t will give : s/t = u + 1/2at
Substituting for s/t :
v = u + 1/2at ------> y = c + mx

And for part d..m not so sure
« Last Edit: May 15, 2011, 03:40:00 pm by ang3l »
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Offline MasterMath

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Re: Edexcel PHYSICS Doubts
« Reply #523 on: May 15, 2011, 03:50:41 pm »
Question 4 2009.. Why is the answer not A instead of D(which is totally wrong cause the diode is reverse biased.. the MS says D :S) Anyone could help please?
and for question 3 a) .. Is it D or C :S? is the MS all wrong? cause Golden girl says C while the MS says D
thanks in advance!
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Offline Malak

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Re: Edexcel PHYSICS Doubts
« Reply #524 on: May 15, 2011, 03:56:13 pm »
Quote from: MasterMath on May 15, 2011, 03:50:41 pm
Question 4 2009.. Why is the answer not A instead of D(which is totally wrong cause the diode is reverse biased.. the MS says D :S) Anyone could help please?
and for question 3 a) .. Is it D or C :S? is the MS all wrong? cause Golden girl says C while the MS says D
thanks in advance!

For Q3 a its D
You always give the answer for your average to same d.p. or sf as the values so its D
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