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Physics: Post your doubts here!
Electromagnetic Radiation is composed of quanta (packets) of energy called Photons. So the electromagnetic radiation which strikes the cathode plate is carrying photons. And the -ve charges that are emitted from the plate are Photoelectrons. This can be figured out from the definition of work... -
Mathematics: Post your doubts here!
Is this a part of Q5, J04, P2? If yes, then I integrated the given equation from 0 to 2 and the answer that I calculated is 0.59~0.60 while as the one calculated using the trapezium rule is 0.50. This show's that the value calculated by the trapezium rule is an underestimate of the area but I... -
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Mathematics: Post your doubts here!
From which year is this question? and is the answer 7? -
Mathematics: Post your doubts here!
It's written in my mathematics book that 'If a graph is bending downwards over the whole interval from a to b, then you can be certain that the trapezium rule will give you an underestimate of the true area. If on the other hand, a graph is bending upwards over the whole interval from a to b... -
Mathematics: Post your doubts here!
Well the question's pretty easy. First you need to integrate dy/dx=x^2(x-k). After integrating you will get y=(x^4)/4 - (kx^3)/3 + c. Then put x=2 and y=-2 in the integrated equation and get an equation in terms of 'k' or 'c'. I took it out in terms of 'c' and it came out to be c=(8k-18)/3. Then... -
Mathematics: Post your doubts here!
need solution to question Q8ii and Q9ii both from Mathematics P33 May/June 2011. The questions can be found over here : http://www.xtremepapers.com/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_s11_qp_33.pdf. Thanks in advance.