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Thanks There is a clear stereotype there: accelerants = smart people. Consider This: Einstien was not an accelerant nor was he a Grade 6 Graduated Student, however what do we consider him as today- Genius. Similarly, I donot compete with other people and I absolutely detest that. My only Aim...

Start with technical definition of bases and acids. I.e. H+ and OH-..... Then Show Equations of naturally occuring bases and acids and then use full ionic equations.

Guys as you know that there is atleast one complex number question in an exam that is completely different to what we have done in most trial papers or is not in the books whether it may be roots of unity or trig applications in complex numbers. Is there a way to familiarise each and every...

hey thanks for the help brantic and cineti and all others. I did also get the same answer the second time however I was not sure if I was right because the wording of the question confused me because It didnt make clear which region was to be rotated since it says x axis and y axis both in the...

The region bounded by the curve y=sqrt(x+1), the x-axis, the y-axis, 0 ≤x ≤8 , is rotated about the y-axis to form a solid. Find the volume of the solid.

I am sorry but I had included it in there: the rotation around which axis. But i havent been given the correct answer. It says the region rotated around. Please check the post.

But then arent we rotating about the y axis? why did u minus the volume when rotated around the y axis.

How did you get this? i found the volume of cylinder and then subtracted the volume the curve makes with x axis to find the volume that it makes with y axis. Ty Ty

1) Y= 1/ sqrt (x), explain why 18<1/sqrt(1) + 1/ sqrt(2) + 1/ sqrt(3).... + 1/sqrt (100)<19 . The answer I get is different. Please show me how to do this. Please show proper working. 2) Find volume of curve y= Sqrt (1+x) when rotated about y axis ( for 0≤ x ≤ 8) . My answer is 152PI units^3...

3U Volumes is the one i am talking about. Please help *bump*

Eco depending on your interests.

Since In a circle doesn't matter where a person sits the first person would be able to be distinguished in a position because all places around the circle are considered as one arrangement.

hey there for 1 Use R sin (theta- alpha) Now this expand this using sum of angles formula Now equate both sides and find commonalities. Then square the 2 trigonmetric R forms received . Then Add them to get R^2= something. Then Find R Then Sub R back into the commonality equation. Then find...

So am I wrong cineti?

1) There are 4 girls and 4 boys which can be alternated in 2 groups of 4! x 4!. However at each place where a girl can sit a boy can also sit because the number of both are equal so answer is 4! x 4! x 2 2) So here Sally and John can be considered a group and the rest 3 girls and 3 boys must...

Yes this is a Cambridge question right? It basically what HSC 2014 said. This is because there are 10 ways that the sequences can be arranged in which there are 10 exponential possibilities and there are 2 possibities of the symbol.

On any parabola there two points or more that can be taken into consideration. For a upwards x^2=4ay parabola, the points are as follows: (2ap,ap^2) and (2aq, aq^2). a) Using gradient formula for these two points we get gradient = (p+q)/2 Now using point gradient formula: y-ap^2=...

As Kurosaki said, Concentration= moles/ volume. THerefore moles= concentration x volume. Remember in Most cases volume in in Litres in chemistry as seen by mol/L in concentration. Therefore to get number of moles of barium chloride: 0.05*0.5=0.025. Since 0.05 is volume in litres and 0.5 is...

Hey guys I am doing ok in the integration and finding volume part but the hard part seems to be visualising the solid formed when the f(x) is revolved. So for example what would y= x^2-1 look like when rotated about x axis and y axis? Its hard to visualise this. The integration is simple as soon...