Wolfram|Alpha is a "computational knowledge engine" developed by Wolfram Research, announced in March of 2009. It is unique in that in answers queries with direct computational results, rather than bringing up a page of documents and various webpages as most search engines do.

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How to substitute values to equation in Wolfram Alpha?

It's a fundamental use and WolframAlpha appeared entirely uncooperative. Given: E = (4.49*10^16 Joules), m = (1 kilogram), c = (speed of light in vacuum), and the equation: v = (sqrt(E) c sqrt(2 ...
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Plot multiple functions in Wolfram Alpha

I tried to multiple plot in WolframAlpha using this command from the Forum: plot {1<=x<=2 1<y<3} and plot {x=4 1<y<3} and plot {1<=x<=2 y=4} and plot {x=4 y=4} and plot {1<=...
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WolframAlpha - Is it possible to associate equations with theorems?

Suppose I wanted to find out about the Pythagorean Theorem by searching via WolframAlpha. This is trivial -- we can search directly for Pythagorean Theorem and get a wealth of information. But ...
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Simplifying (-1)^n + 1 for integer n in Wolfram Alpha

How do I make Wolfram Alpha transform (-1)^n + 1, where n is an integer, into 0 for n = 2*k + 1 and 2 for n = 2*k? Is there something like that?
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WolframAlpha won't recognize my second derivative

I have been trying to calculate my derivative in WolframAlpha by inputing this: A=0.921/10^(9), a=1*10^(-9), h=1.055*10^(-34), m=9.109*10^(-31) int_((-pi)/(2*a))^((pi)/(2*a)) A cos^2(x/a)*(-h^2/...
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How are the lines on HTML element hierarchy plots in Wolfram|Alpha generated?

Wolfram Alpha provides HTML element hierarchy plots for web sites. For an example, enter a popular website, like stackoverflow.com into the field: http://www.wolframalpha.com/input/?i=...