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Physics: Post your doubts here!
Hey I attached them for you. For Q6 a) use right hand rule, thumb along current direction and other fingers along magnetic flux direction. b) i) use Flemings left hand rule, thumb is direction of force, first finger direction of flux and second finger direction of current, then, do this to both... -
Mathematics: Post your doubts here!
Here you go :) if there's any more doubt tell me Justification : Drop down a perpendicular to get AB or AC in terms of r and use simple trigonometry , then cross out r^2 and simplify , change (Costheta)^2 and 2sintheta.costheta into their identities . Then make cos2theta the subject :) -
Mathematics: Post your doubts here!
Hi, for Q2, let 3^x= u You now have 2|u-1|=u Now |2u-2|=u Square both sides, (2u-2)^2=u^2 4u^2 -2(2u)(2)+ 2^2= u^2 3u^2 -8u +4=0 Solve on calculator u= 2 u= 2/3 But, 3^x = u So 3^x=2 and 3^x=2/3 So xln3=ln2 and xln3= ln(2/3) x= 0.631 and x= -0.369 Q4 x=e^-t.cost and y= e^-t.sint Differentiate... -
Mathematics: Post your doubts here!
Hey, I have solved this question before it's not hard, all you have to do is to find everything in terms of r and pie and you have to equate the area of shade to half the area of the circle and yeah pretty much basic algebra, I'll do this for you tomorrow really need to sleep -
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Mathematics: Post your doubts here!
Hi what question are you talking about? -
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Mathematics: Post your doubts here!
I just solved these for you, from which papers are they? So I check if my answers are correct -
CIE As and A-Levels papers not opening
Try www.freeexampapers.com or www.maxpapers.com as alternatives for now. -
Post your AS-Level Mathematics (P1 and M1) doubts here.
Hope its clear, sorry had to squeeze it in last lines. -
Physics: Post your doubts here!
The number of the page we are on right now ain't cool man xD -
Physics: Post your doubts here!
Hi, for 3c)i) the cube loses contact with the plate momentarily when the plate is at its maximum displacement from rest position. This happens because the plate is oscillating, and at its maximum displacement, the plate will instantly reverse direction, which causes the cube to lose contact with... -
Mathematics: Post your doubts here!
Papajohn here you go, I hope its clear :) -
Mathematics: Post your doubts here!
Hey, I don't know Statistics unfortunately, I study Mechanics instead :) -
Mathematics: Post your doubts here!
Hey, in 7) were given vectors OA, OB and OC. We have to show that angle BAC is = cosinverse (1/3) This angle is at the vertex A, draw a quick sketch it'll make things clear. This angle is between vectors AB and AC also, a quick sketch will help you. We know that Costheta= A.B/|A|.|B| Where theta... -
Physics: Post your doubts here!
Hey, I suggest you use www.freeexampapers.com or www.maxpapers.com as an alternative for now. -
Physics: Post your doubts here!
If the answer is B then this is how. We know that PE= 80 J just before release, so use efficiency equation and PE=mgh Efficiency is 28% We know efficiency = output/input 28/100= output/ 80 Output = 22.4 J Now use PE= mgh Mass of arrow= 120 g= 0.12 Kg since arrow is shot alone 22.4= 0.12(10)(h)... -
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Something kinda odd
I noticed this too, I always ask myself could the xtremepapers admins be inactive? O.0 I mean Past papers not responding for 1 month now and no countdown -
Mathematics: Post your doubts here!
Hi, 5) i) they want the KE gain of the whole system, we know that KE=1/2mv^2 We know block A mass= 5 kg and B= 16 kg So KE of whole system = (1/2)5v^2 + (1/2)16v^2 = 10.5v^2 J ii) a) we need the loss of PE of the system. We know that PE= mgh and we know they moved a distance of x We also know...