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What happens to your body during an asthma attack? http://khan.co/AsthmaKA  
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Miriam Bennett- Shaheed's profile photoS.H. Kyaw's profile photoZeynab A.'s profile photoGladys Stewart's profile photo
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Not for freakin' long if all this dam FRACKing gets to continue in its course.
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Can you find the volume of S? http://khan.co/IntVol  
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Choice D is correct.  The two choices in the top row are incorrect because the upper and lower bounds are y values, but the integral is with respect to x.  Choice C is incorrect because it is squaring the diameter of the semicircles.  The radius would be [g(x) - f(x)]/2.  When you square that you get a denominator of 4 which is what makes it pi/8 in front of the integral.
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What does it mean if you have "clogged arteries"? http://khan.co/CorArt 
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Michael Sullivan's profile photoSandra Jett's profile photoAndy Roemer's profile photoZeynab A.'s profile photo
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fajne można sie czegos zupełnie innego w końcu nauczyć. :)
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AP Calculus exam on the horizon? Get ready with Khan Academy: http://khan.co/KA_Calc  
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Christian Hatchett's profile photoZeynab A.'s profile photoPerla Gutierrez's profile photodanmjack's profile photo
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khan academy is awesome i used to go there daily but now i dont anymore
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Which graph represents this system of equations? http://khan.co/SysEq_KA  
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yes
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What is the halo effect, and how does it affect our perceptions of other people? #MCAT http://khan.co/KA_Halo 
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I've noticed that since high school. We'd be in a group and an attractive person said something funny and everyone laughed. Then someone else would say very same thing and no one paid attention.
I called it the... Jan... effect(^_^)
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Learn how to create your own laser light show -- using your voice! http://khan.co/VoiceExp 
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‫אהוד ים מיכלוביץ‬‎'s profile photoRomana Cozzolino's profile photodanmjack's profile photojacob fawcett's profile photo
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awesome!
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Can you crack the deductive reasoning problem from Singapore that's taking over the internet? http://khan.co/CherylBD  
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+mustafa achmar Why does my age matter to you.
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"A student who does not respect the Buddha is eaten up raw by Mahakala." http://khan.co/DL_KA  
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+Lukas Brockenbrough Because you have to in 1-3rd place? I don't know.
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What happens to your body during a stroke? http://khan.co/KAStroke  
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Khan Academy to naprawdę świetny portal. Polecam :D
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What secret messages are hidden within Thomas Cole's "The Oxbow"? http://khan.co/OxbowKA  
Thomas Cole, View from Mount Holyoke, Northampton, Massachusetts, after a Thunderstorm—The Oxbow, 1836, oil on canvas, 51 1/2 x 76 inches / 130.8 x 193 cm (The Metropolitan Museum of Art) Speakers: Dr. Steven Zucker and Dr. Beth Harris
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B
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EdTech should be a means, not an end, to improving our education system.

Check out this new blog post by Sal in which he explores four ways technology can help empower teachers and students: khan.co/1BRdltQ 
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if 1400 men in a fort had provision for 30 days . after 6 days 700 men leave the fort. how long will food last now ?? Guide me for this ...
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Have them in circles
688,671 people
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A free world-class education for anyone anywhere
Introduction

The Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education to anyone anywhere.

Our resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get a leg up in earthly biology. The Khan Academy's materials and resources are available to you completely free of charge.