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Yeah.. thnx.. but didnt get what u meant in Q27?
Can u also please do Nov 2010 P12 Q25 please?
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Physics: Post your doubts here!
- Thread starter XPFMember
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Yeah.. thnx.. but didnt get what u meant in Q27?
Can u also please do Nov 2010 P12 Q25 please?
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Can anyone plz clarify how to find percentage uncertainty of May june 2012 variant 2 ????
i understood neither of the methods of MS
i understood neither of the methods of MS
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27. What I meant was that Work Done on a point charge equals to the voltage x the charge. The charge for all the four is the same.
25. In tube X, the fundamental frequency will be 1/4 lambda. In tube Y, it'll be 1/2 lambda. f - 1/4, so x - 1/2.
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Q 22 - 1st of all calculate mass* 6.02*10^23. this gives u the mass of all atoms in the crystal. then find the volume by dividing the mass u calculated by density. density=mass/volume. Then divide volume by 6.02*10^23. and find its cube root
Q25- Umm i guess extension will be the same as it obeys hookes law. Not sure though :/
Q26 - speed=2d/t. distance is muliplyd by 2 as its reflected so it travels the same distance twice. speed is that of light. so (2*150)/3*10^8 will give u 1 microsecond.
Q28- the two points are very apart by almost 1 full wave. Half wave apart is 180 degree but here the separation is greater so its 270.
Q35- sorry cant explain ! bad at this chap :/
Q38 - Just use a similar value for all resistors like 5ohm and calculate the combined resistance. If u use 5ohm then circuit 1 has resistance of 2ohm, 2 has 3 ohm. and 3 has 3.75 ohm
THANKS ALOT!
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pls I have a problem getting v^2=2gh(m/m+M) .
what is h .
I tried many equations
what is h .
I tried many equations
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Q7 : horizontal component of velocity in projectile remains constant. and vertical component first decreses till max height (where it is zero) and increases to max for the other half of the journey
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the answer is A. This is beacuse pressure=hdg. so h=p/dg. pressure will now be 10% of atmospheric pressure. so (10/100)of atmospheric pressure. this gives atmospheric P/10 hence p/10dg
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thnku so much sister for da helpthe answer is A. This is beacuse pressure=hdg. so h=p/dg. pressure will now be 10% of atmospheric pressure. so (10/100)of atmospheric pressure. this gives atmospheric P/10 hence p/10dg
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no probthnku so much sister for da help
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Do you mean making h the subject of the forumla? h=v^2/2gx(m+M/m).
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7. The component of acceleration is the acceleration due to gravity and that's the same always anywhere on Earth.
20. Choose a point and find the pressure due to P & Q at that same point. For example, any point on the second dotted line. The pressure due to Q will be = density of Q x g x h. The pressure due to P will be = density of Q x g x 2h. Cancel out g for both, you'll get density of Q = pressure/h, and density of P = pressure/2h.
25. Points on a wave vibrate up and down, and don't move to the right. A trough is travelling towards P, so P is going down.
can someone pls explain these questions to me?
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_12.pdf
question 18 27 and 30 37
http://papers.xtremepapers.com/CIE/...nd AS Level/Physics (9702)/9702_w12_qp_12.pdf
question 18 27 and 30 37
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Q30- d sin theta=n lambda
sin theta=1 as its normal to the grating. then d=1/N. N=300 per mm means 300000 per m. so 1/300000=(690*10^-9)*n
n will be around 4. then multiply by 2 and u get 9
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Q37 - its not D as no current will pass if both switch are open. Then its not even A as both are closed so current will be I. In B S2 is open and S1 is closed so current just flows in series so current is still I. In C current flows through parallel circuit as S1 is open and S2 closed and current is not equal in parallel so it will not be I
Q37 - its not D as no current will pass if both switch are open. Then its not even A as both are closed so current will be I. In B S2 is open and S1 is closed so current just flows in series so current is still I. In C current flows through parallel circuit as S1 is open and S2 closed and current is not equal in parallel so it will not be I
okay you're a genius! thanks so much