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RF Cascade Workbook 2005 - RF Cafe
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About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:
 AirplanesAndRockets.com

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There are 1,000s of Pages Indexed on RF Cafe !

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Khan Academy - "Learn Almost Anything for Free" - RF Cafe

Khan Academy - "Learn almost anything for free" - RF Cafe"Learn almost anything for free." That is the tag line of the Khan Academy. While the claim is a bit of a stretch, especially when you need to delve below surface level, they do have over 3,300 videos on everything from math to physics, finance, and history. According to their website, in August 2004, Sal Khan began remotely tutoring his cousin, Nadia, who was struggling with unit conversion. Soon, Sal also began tutoring her brothers as well. He became so popular that he started recording videos and posting them on YouTube. More and more people kept watching, and Sal has continued to make videos ever since. Khan eventually drew the attention of Google ($2 million grant) and Bill Gates ($1.5 million grant). The rest, as the saying goes, is history.

Khan Academy Basic Circuit Analysis - RF CafeRF Cafe visitors might be particularly interested in subjects like circuit analysis (4 lessons), capacitance, magnetism (12 lessons), electric motors, electrostatics, Doppler, optics, and fields. You might also like watching the video lessons on momentum and torque, friction, gravity, thermodynamics (5 lessons), Newton's laws , and fluids (12 parts).

For a little nerd fun watch the video on what the takeoff roll for an Airbus 380 would be for various weights or how fast a baseball would need to leave the bat of a hitter at home plate to clear the Green Monster at Fenway Park.

Clearing the Green Monster at Fenway, Khan Academy - RF CafeSome lessons do go well beyond introductory concepts by including vector products and calculus in the presentation. Magnetism, for example, uses cross products in the high numbered lessons.

Khan Academy complex number - RF CafeIf you need a math refresh, maybe the lessons on complex numbers would be helpful. If you're doing statistical analysis, then the box-and-whisker lesson might help. There are modules for probability and statistics as well, and for about a hundred other topics including trigonometry, geometry, factoring polynomials, exponents, logarithms, linear algebra, and matrix operations.

Finally, if you are involved in the business side of the company, lessons on microeconomics and macroeconomics cover topics like the business cycle, fiscal policy, inflation and deflation, investment, and money supply.

Even if these video lessons are of no interest to you, they might be just what your kid is studying in school. The fresh insight from a different instructor could be just what he/she needs. It's worth a try.

The August 2012 edition of IEEE's Spectrum magazine ran an article on Khan Academy if you want more information (other than just visiting Khan Academy's website).


These items are an archive of past Topical Smorgasbord items that have appeared on the RF Cafe homepage. In keeping with the "cafe" genre, these tidbits of information are truly a smorgasbord of topics. They all pertain to topics that are related to the general engineering and science theme of RF Cafe. Note: There is also a huge collection of my 'Factoids' (aka 'Kirt's Cogitations') that might interest you as well.

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