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Physics, Chemistry and Biology: Post your doubts here!
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omw i bet this is so late but i just saw this idk if it will help for some reason the workdone=(f*d)+k.e which means f*d + 1/2mv^2 which is 10000+2500..so crazy
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the link doesnt workYou can also ask in the A level forum btw.
Here you go...
AS-P2 topicals for Biology here and here.
P4 topicals for Biology here and here.
Other Biology A level things:
AS Biology
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-260#post-913723
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-260#post-913737
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-260#post-913752
https://www.xtremepapers.com/commun...st-your-doubts-here.9858/page-260#post-913784
^ AS paper 1 Notes by My Name read full posts and note down the mistakes!
https://www.xtremepapers.com/commun...ry-and-biology-revision-guides-updated.40762/
^Revsion guide :
https://www.xtremepapers.com/commun...o-phy-chem-maths-with-markschemes-here.36384/
^AS classified past paper 2
https://www.xtremepapers.com/community/threads/biology-practical-notes.4718/
^ AS paper 3
https://www.xtremepapers.com/community/threads/biology-9700-paper-4-past-paper-notes.41234/
https://www.xtremepapers.com/community/threads/biology-p4-section-b-solved-2002-2013.33080/
^A2 paper 4 solved and notes
https://www.xtremepapers.com/community/threads/biology-paper-5-tips.27105/
^A2 paper 5 tips
I hope that helps.
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if XY is moved horizontally in any direction, no magnetic field lines will be cut therefore no change would be observed on the pointer.
However, if XY is moved up and down repeatedly at right angles to the magnetic field, the magnetic field lines are cut and current is produced because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move. So the answers will be:
(i) no change
(ii) no change
(iii) no change
(iv) pointer flickers between A and B
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I always find it difficult to solve physics atp... Could you provide me some tips fr help?
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(i) Fig.10.3 the coil is perpendicular to the magnetic field , so the e.m.f is at its maximum
(ii) Fig.10.1 as the coil is parallel to the magnetic field, thus no e.m.f is produced
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I am not really sure but I guess we should add their masses (as they will be joined together) and then divide 0.16 (as momentum before the collision is equal to the momentum after the collision) by 0.8 (the sum of their masses) to get the speed(velocity) to be 0.2m/s
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mole=volume x concentration
volume=mole x 24
4(c)(i) 0.002 (mol); 0.1 x 0.02dm3 (e.g 20cm3/1000)
4(c)(ii) 0.001 (mol); 0.002/2 (becuz its 2H2O2:1O2 SO 2:1)
4(c)(iii) 0.024 (dm3); 0.001 x 24
4(c)(iv) no change/ no effect; (as catalysts don't affect equilibrium and thus the volume of the reactants-it just speeds up the reaction)
4(c)(v) 0.048 (dm3 ); 0.024 x 2 (as concentration is doubled )-e.g 0.1mol/dm3 x 2 = 0.2 mol/dm3
Hope it helps
Good luck!
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Here are some I use. Hope they r beneficialHello everyone, I need some help, can anyone please give me notes for Physics, Chemistry and Biology, thanks
thank you very much sir I really appreciated, god bless you
Thank you very much sir, for helping me again, god bless youmole=volume x concentration
volume=mole x 24
4(c)(i) 0.002 (mol); 0.1 x 0.02dm3 (e.g 20cm3/1000)
4(c)(ii) 0.001 (mol); 0.002/2 (becuz its 2H2O2:1O2 SO 2:1)
4(c)(iii) 0.024 (dm3); 0.001 x 24
4(c)(iv) no change/ no effect; (as catalysts don't affect equilibrium and thus the volume of the reactants-it just speeds up the reaction)
4(c)(v) 0.048 (dm3 ); 0.024 x 2 (as concentration is doubled )-e.g 0.1mol/dm3 x 2 = 0.2 mol/dm3
Hope it helps
Good luck!