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Tuesday, June 30, 2009

numerical problems in physics

Uniform motion
A vehicle accelerates from rest at a constant rate A m/s² for some time after which it decelerates at a constant rate B m/s² to come to rest. If the total time elapsed is T seconds, find the maximum velocity and the total distance travelled in terms of A,B, T explanation


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Monday, June 29, 2009

engineering colleges in kerala

some engineering colleges in kerala

CET college of engineering , Trivandrum cet.ac.in
Government engineering college , Barton Hill, Trivandrum , gecbh.ac.in
TKM college, Kollam tkmce.org.in
LBS institute of technology for women lbsitw.ac.in
SCT college of engineering , pappanamcode sctce.ac.in

University college of engineering, Kariyavattom keralauniversity.edu/uce/
Mar Baselios college of engineering , Nalanchira mbcet.org
Marian Engineering College, Kazhakuttam marianengineeringcollege.com




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Thursday, May 28, 2009

fourier series

Formulae for fourier series of a function f(x) which satisfies dirichlet's condition
note that for full series in(0,2pi) (-pi,pi) or when l = pi the expression ( n*pi*x / l ) reduces to (nx)
Problem
half range fourier cosine series of f(x) = x² in (0,l) explanation answer


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normal equation to fit a parabola

normal equation to fit a parabola or second degree equation

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Wednesday, May 27, 2009

reduction formula for (sinx)^m (cosx)^n with limits 0 to pi/2

reduction formula for (sinx)^m (cosx)^n with limits 0 to pi/2
in the numerator start off with (m-1) , (n-1) subtract 2 successively till 2 or 1 is reached
in the denominator
start off with (m+n) , subtract 2 successively till 2 or 1 is reached

Also put a pi/2 in the numerator if m and n are both even


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Tuesday, May 26, 2009

is it possible to make money online

Is it possible to make money online? Most websites say that having a blog with some advertisements from google adsense, adbrite, bidvertiser, tyroo so on is the easiest way to make money. But the problem is that you need more than 1000 hits per day to generate any meaningful revenue. To get that kind of pageviews per day, you need to generate that much quality content and that will take a lot of your time.

There are many  fake surveys also doing the rounds. Some of the better paying surveys are only available to people in the developed countries like Britain, Canada etc and is not available to people from countries like India since the people conducting the surveys may be interested in the people who are likely to use their products.

There are also options like micro tasks which may be sometime spreading spam by making comments on blogs, popularising links/content on twitter, facebook etc.

There are also some options like upwork (similar to free lancer ) where you have to bid for the work(like editing, writing articles etc ) , and you have to have the necessary knowledge to take up the available work and a good internet connection to be able to finish the work properly and to the satisfaction of the person who wanted you to do the work.

You can also use websites like ebay to sell stuff for profit, but you have to be very prompt with your customer service and the competition will be very high for most of the common items and the margins on some  items might be very small.

Another thing that you have to consider , if you are in places like India is how the payout is made and what kind of expenses(charges etc) will come if you are cashing a cheque denominated in dollars at your local bank.
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Friday, May 22, 2009

integral of (x^3)*sqrt[4-x^2] using substitution

integral of (x^3)*sqrt[4-x^2] using substitution

use 4 - x² =u²

write every thing in terms of u, open up the brackets and integrate.


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Dot Plots, Histograms and Stem-and-Leaf Plots | AP Statistics

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