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How To: Make musical instruments from household items

This SUPER cool video shows how to make some fantastic percussion instruments out of items you can easily find around your house, or for cheap around your neighborhood. From plastic pails, PVC pipes, tin cans, buckets, 45 gallon drums and more. This video is short, but very inspiring when you see what cool things you can build on your own. Musical instruments can cost thousands of dollars, but with this video you can make dozens of instruments from items around your home!

How To: Change to a 35mm lens adapter on a video camera

35mm lens adapters cost thousands to buy, hundreds to build, degrade the objective technical quality of your video and make your camcorder an entire magnitude more difficult to use. And they won't make your video magically look like film. Nothing will. On the other hand, by adding selective focusing options to small consumer camcorders, 35mm lens adapters have the potential to produce some absolutely gorgeous images. Watch this video tutorial and learn how to adapt a video camera to a 35mm le...

How To: Manage photos in Aperture

Instead of using Photoshop, why not give Apple's Aperture a try? Aperture is designed more for post-production work for professional photographers, letting you cull through shoots, enhance images, manage massive libraries, and deliver stunning photos.

News: We May Finally Know How Many HoloLens Devices Microsoft Sold, & It's a Revealing Peek at the Future of AR

Last week, we told you about Microsoft's Alex Kipman and his nomination for the annual European Inventor Award, presented by the European Patent Office (EPO). And while that's big news in and of itself, it turns out we overlooked a very important detail buried in the EPO's video presentation. What was it? Only one of the most sought-after data points related to the HoloLens since its launch: how many have been sold.

How To: Interpret derivatives of marginal cost and revenue

This video tells us the method of interpreting derivatives of marginal cost and revenue. If C(x) is the cost of producing x units of a product, C(400) would be the cost to produce 400 units. Now marginal cost is the cost of producing one unit which is equal to the derivative of the cost function or C'(400) which is equal to limit of h tends to zero or lim h->0 [lim(400+h)-lim(400)]/h which is approximately equal to [lim(401)-lim(400)]/1. Similarly, if R(x) is your revenue function, marginal r...

How To: Get free podcasts with iTunes 8

A podcast is a show, such as a radio or TV show, with episodes you can download and play on your computer, iPod, or iPhone. The iTunes store has thousands of audio and video podcasts from all over the world, and every one of them is free.

How To: Hack digital pictures to send secret messages

This video tutorial will teach you a simple hack that will allow you to hide a secret message in any digital picture. Who knew a picture could actually be worth a thousand words? Real words, embedded within! For detailed, step-by-step instructions on recreating this hack yourself, take a look. Keep your messages on the Internet secret with this how-to.

How To: "Back out the tax" from a receipt

In this video, we learn how to back out the tax from a receipt. If you have a receipt where you see how much you paid and know the tax rate, except you want to figure out the cost of the item before the tax. First, take the cost of the item including tax and what the tax rate is. To figure out the original price, let x equal the cost of the item. Add the tax to the cost of the item which will equal the cost you paid. Perform the equation 1x+(tax rate)= (total price). After you figure this equ...

How To: Perform the floating rice trick

This is a cool trick that creates the illusion that one object appears heavier than the other. Check out the video, and watch Steve Spangler perform this trick and teach you how to do it! This trick, dating back thousands of years, uses two identical bottles of rice and chopsticks. One bottle appears to be lighter than the other and floats up.

How To: Get started on Facebook

In this video, Bea Fields will show you exactly how to set up and use a new Facebook account. Facebook is an awesome social networking utility that can keep you in touch with friends, family and other loved ones. If you have never used this online utility before, check out this video and get started. You will be on your way to thousands of "friends" in no time.

How To: Find and subscribe to new podcasts in iTunes

Podcasts are like portable radio shows. They are pre-recorded performances you can download onto your computer, iPod or other mp3 player and listen to at your leisure. The iTunes store offers thousands of podcasts and videocasts, and this tutorial shows you exactly how to subscribe to one so you'll never miss an episode.

How To: Use opaque watercolors in Chinese watercolor painting

The esteemed tradition of Chinese watercolor goes back thousands of years and hasn't changed much in terms of composition, subject matter, and materials used. So back then as much as today sky dieties and kings would sip green tea outside pagodas perched high above the clouds, surrounded by monumental mountains and far removed from mortal space.

How To: Make a truffle omelet with Martha Stewart

Truffles and truffle oil make just about any foodstuff a thousand times tastier (and, admittedly, more artery-clogging). Early death aside, truffles make excellent additions to morning omelets, as well, injecting a juicy, buttery flavor to the fluffiness of the eggs.

How To: Work with cost & selling price markup in MS Excel

As you might guess, one of the domains in which Microsoft Excel really excels is business math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 48th installment in his "Excel Business Math" series of free video lessons, you'll learn about the basics of markup on cost and markup on selling price. Markup on cost uses the base cost. Markup on selling price uses the base selling price.

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