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Conservation of electric energy | AP Physics | Khan Academy
Connecting electric potential and field using calculus | AP Physics | Khan Academy
Electric potential of charge distributions | AP Physics | Khan Academy
Free MCAT Test Prep at Khan Academy
Electric potential and electric field | AP Physics | Khan Academy
From ROI to "Return on Learning": A District's Khan Academy Story
Electric potential | AP Physics | Khan Academy
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Khan Academy is a nonprofit providing a free, world-class education for anyone, anywhere. Our interactive practice problems, articles, and videos help students succeed in math, biology, chemistry, physics, history, economics, finance, grammar, and many other topics. Khan Academy provides teachers with data on how their students are doing so they can identify gaps in learning and provide tailored instruction. We also offer free personalized SAT and LSAT practice in partnership with the College Board and the Law School Admission Council. Our resources have been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy each month. Want to extend your learning beyond YouTube? Practice what you've just discovered for free: www.khanacademy.org
Khan Academy — 常见问题
根据当前 CPM 估算，Khan Academy 的 YouTube AdSense 收入约为每月 $3K。
根据近期上传频率和估算的 CPM，Khan Academy 每个视频大约赚 $28 – $76。
Khan Academy 拥有 9.49M 位订阅者。
Khan Academy 的总观看次数已达 2.25B。
Khan Academy 目前已上传 9.5K 个视频。
Khan Academy 每个视频平均约 8K 次观看。
Khan Academy 于 2006年11月17日 创建了 YouTube 频道。