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How To: Make a Powerful PVC Air Cannon with Coaxial Piston Valve

The video featured in this article demonstrates the function and design of a powerful form of air cannon that operates using a purpose made valve that opens very rapidly. This allows for a massive amount of pressurized air to be released at once to throw a projectile many hundreds of yards. The design of the cannon also allows the barrel and the air chamber to occupy the same space, and so it is very compact and manageable which makes for an enjoyable shooting experience.

How To: Use the Lego Mindstorms NXT software to program robots

Lego Mindstorms is a great way to take your Legos to the next level by adding in the flavor of robotics! But, with taking it up to the next level, it does get a hair tougher! And if you're having trouble working with the Mindstorms software, this great video with Patrick Norton and David Calkins goes over each step of using the software so you can have your very own robot ready to go in no time!

How To: Unlock a jailbroken iPhone 4, 3GS, or 3G with Ultrasn0w

If you're an iPhone owner and you're sick to death of having to deal with AT&T's terrible network, it is possible to unlock your phone and use it on another carrier! And the process is easier than ever now that jailbreakme has made jailbreaking iPhones in preparation for unlocking so easy! This video will show you how to download and use Ultrasn0w on you iPhone, which will unlock it and make it ready for use with TMobile or Verizon or any other carrier.

How To: Stealth patch XBox 360 ISO's with AGBX 360

If you have a hacked XBox 360, you've only accomplished part of the process required to allow you to played burned copies of games on your console. You also have to burn the games correctly, and part of doing that is stealth patching you ISO files to make sure that they are up-to-date and won't get you noticed by Microsoft. This video will show you how to use AGBX360 to stealth patch you files and make them ready to play.

How To: Build a portable green screen for under $30

Special effects are so cool and so..expensive! In this tutorial, learn how to make a portable green screen for very cool effects for less than 30 bucks. This green screen can move with you so you are ready to shoot no matter where you are! Follow these step by step instructions and you will be practicing your Oscar speech in no time.

How To: Fold an origami phoenix

Once you have mastered how to fold an origami crane, you are ready to try the phoenix. A phoenix is a mystical bird that rises from the ashes and is very powerful. They are a great inspiration to have around you. Check out this tutorial for a step by step on folding your own origami phoenix bird and feel inspired.

How To: Open bottles with one arm without prosthetics

A below elbow arm amputee shows how to open bottles one handed, without a prosthetic device. This technique is also great for people with arthritis pain, cerebral palsy, weak joints, stroke, and people who want to be ready for the worst-case-scenario that they suddenly have only one free hand and have to dismantle a bomb that is hidden inside a bottle! This is a great tutorial for handicapped, disabled or individuals that have lost a limb to amputation.

How To: Make linear tracks on the Technik Skater

Watch this professional cinematography video to learn how to make linear tracks on the P+S Technik SKATER Mini dolly to better utilize and maximize its performance. It's actually extremely fast to get the Skater ready to shoot. Learn how to make straight tracks inward as well as a typical linear tracking shot. View final footage of the Skater used on professional film sets.

How To: Factor trinomials using the Berry factoring method

In this free video math lesson YAY MATH, we learn how to factor trionmials using the Berry method. With mathematics, as with anything else, not everyone progresses at the same rate. Algebra is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. Whether you need help finishing your homework or studying for that next...

How To: Simplify expressions involving i in intermediate algebra

In this free video math lesson YAY MATH, we learn how to work with imaginary numbers in intermediate algebra. With mathematics, as with anything else, not everyone progresses at the same rate. Algebra is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. Whether you need help finishing your homework or studying fo...

How To: Work with logarithms in intermediate algebra

In this free video math lesson YAY MATH, we learn about logarithms — what they are, how they work and how to solve math problems involving them. With mathematics, as with anything else, not everyone progresses at the same rate. Algebra is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. Whether you need help fin...

How To: Do synthetic division in intermediate algebra

In this free video math lesson YAY MATH, we learn how to divide a polynomial by a linear factor (e.g., x - a) using synthetic division. With mathematics, as with anything else, not everyone progresses at the same rate. Algebra is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. Whether you need help finishing yo...

How To: Divide two polynomials in intermediate algebra

In this free video math lesson YAY MATH, we learn how to divide two polynomials using long division. With mathematics, as with anything else, not everyone progresses at the same rate. Algebra is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. Whether you need help finishing your homework or studying for that ne...

How To: Solve a system of equations with two unknowns in algebra

In this free video math lesson YAY MATH, we learn how to simultaneous equations — sets of equations with multiple variables — in basic algebra. With mathematics, as with anything else, not everyone progresses at the same rate. Algebra is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. Whether you need help fini...

How To: Winterize your boat and prepare it for Winter

In this tutorial, we learn how to winterize your boat and prepare it for winter. First, you will remove the drain plug from the boat and let the water out. After this, remove the oil drain and drain the oil out of the motor while it's warm. Exhaust fumes while the engine is turned on as well. Now, start the engine and let it run for a few minutes staying idle. After doing these steps, your boat will be ready to be stored for the winter. So when you turn it on when it's ready, it won't stall o...

How To: Calculate square roots on paper the easy way

Perhaps not as easy as using a calculator, but easy nevertheless! With mathematics, as with anything else, not everyone progresses at the same rate. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to find square roots by hand.

How To: Multiply a number by zero in basic mathematics

With this free video math lesson, you'll learn how to do multiply any number by zero. With mathematics, as with anything else, not everyone progresses at the same rate. Basic math is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up.

How To: Divide a two-digit number into a three-digit number

With this free video math lesson, you'll learn how to do long division with double and triple-digit numbers. With mathematics, as with anything else, not everyone progresses at the same rate. Basic math is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up.

How To: Calculate the volume of a cube in basic geometry

With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of any cube.

How To: Calculate the volume of a triangular solid or triangular prism

With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of a triangular prism.