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News: World's Simplest Electric Train

The trick in the video is that the magnets are made of a conducting material and they connect the battery terminals to the copper wire, so the battery, magnets and copper wire make a circuit that generates a magnet field just in the vicinity of the battery. The geometry means the two magnets are automatically at the ends of the generated magnetic field, where the field is divergent, so a force is exerted on the magnets.

How To: The Simplest Way to Remove the Background from Photos on iOS, iPadOS, and Android

It's super easy to add filters, adjust levels, and crop images using the default photo editor on your smartphone, but there's rarely any built-in tool for removing the background in a photo. A third-party app can help isolate people and objects in your pictures, and we've found a free one that's easy to use, works with high-resolution images, and is available for Android, iOS, iPadOS, and the web.

How To: Cut a pineapple in the simplest way

Cutting fruits can be difficult if you don't know how to do it. Not only that, but it can result in you wasting precious fruit that you could have easily eaten. So in this tutorial, you'll find out how to cut a pineapple using a simple and easy method. It's a fruit that looks hard to cut, but in reality is quite simple. Enjoy!

How To: Reduce a fraction to its simplest form in basic math

Fractions are numbers of the form a/b, where a and b are integers. Fractions are also called as ratios. Fractions are further divided into proper fractions and improper fractions. Proper fractions are those where the numerator is less than the denominator and improper fractions are those where the numerator is greater than the denominator. As fractions are ratios a fraction can have many equivalent forms. Multiplying the numerator and denominator of a fraction with a same number gives a fract...

How To: Reduce fractions to their simplest form in basic math

This video teaches us the method to simplify the fractions. Let us take an example of 18/24. Find a number that goes into both 18 and 24. Divide the top and bottom by the same number. Here, 2 will go into both numbers. So, the number now becomes (18/2)/(24/2) which gives 9/12. This fraction can be further simplified by dividing the top and bottom by 3. We get 3/4 which is our final answer. The fractions 18/24, 9/12 and 3/4 are called equivalent fractions since they are of the same size. Simil...

How To: Express a ratio as a fraction in simplest form

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to rewrite a ratio as a fraction in its simplest form.

How To: Perform the simplest card trick in the world

Aspiring card shark? Sink your pearly whites into this easy, impressive illusion. In this free video magic lesson from YouTube user experthowto, you'll learn how to perform the non plus ultra of simple card tricks—a trick where the selected card is flipped within the deck. For more information, including a step-by-step breakdown of the trick, watch this prestidigitator's guide.

How To: Play the song "Nightmare" by Avenged Sevenfold on piano

Avenged Sevenfold has been one of the biggest rock bands in the world for a long time, but their most recent single "Nightmare" might be their biggest hit yet. It's a beautiful, haunting song, and like much of A7X's work it translates well to some furious piano playing. This video will show you how to play the song on piano or keyboard in the simplest terms possible, but it's a hard song if you are new to piano you might want to look elsewhere.

How To: Fold a simple origami sailboat with one sheet of paper

If you love boats but hate the open waters, the best thing you could probably do is get over your fear, or… grab some paper and make an origami sailboat. You won't need to take your feet off land with this kind of boat, unless you're jumping for joy after successful completion. This is one of the simplest origami sailboat designs out there, and requires only one sheet of origami paper.

How To: Do club style Salsa dance moves

This video basically covers some of the simplest Salsa dance moves that are basically universal -- that everyone who does Salsa knows how to perform. It is interesting to note that some of the more complicated Salsa dancing moves actually end up being variations of these combos.

How To: Build an Emergency Rucksack with a Poncho & Rope (The Horseshoe Pack)

There’s a good chance that you’ll be alone in life one day, and no... I’m not talking about a couch-bound, dateless loser with a pocket pussy and a bag of potato chips. I’m talking about alone. In the wilderness. Hungry. Cold. Lost. You can’t stay in one place too long, so it would be nice to have something to carry your belongings in. Maybe it’s post-apocalyptic land where you’re the sole survivor, and all the backpacks and rucksacks in the world are but mere ash. Either way, knowing this si...

How To: Make a DIY vehicle immobilizer to stop car thieves

We all know the G-spot as that sensitive area that drives women crazy, but for auto enthusiasts, it has a whole new meaning. The G-Spot, designed by Daniel Davies, is a vehicle immobilizer, which keeps your vehicles safe from car thieves. And you don't need to pay a huge amount of money to get one, either! You can make on yourself, right at home, provided you have all the right materials.

How To: Make crispy cassava chips

These are way better than normal potato chips, big chunky cassava chips is one of the simplest recipes you can do with the cassava root. This is a delicious and simple to make Brazilian Cuisine recipe. Cassavacan be used as a replacement for potatoes, into the dough of several kinds of bread, it makes great moist cakes other desserts. And the fresh cassava is only the start. A lot of Brazilian recipes also used the dried roast cassava flour. Cassava is one of the only plants cultivated by Bra...

How To: Measure pH levels with paper and meters

If you want to know the best way to get an accurate pH measurement, this shows the lab equipment needed and the processes used. When doing chemical reactions, sometimes the acidity or the basicity is important. This is usually defined as pH and measuring it can be very useful for getting the reaction right. There are a few ways to measure pH, and the simplest, cheapest, most reliable method is paper. But that's not all. See a whole lot of ways in this two-part video.

How To: Make a homopolar motor

Turn yourself into an electromagnetism maestro with one of the simplest motors known to man—the homopolar motor. It's the "simplest motor" because of its absent polarity change. The magnetic field does not change the direction or strength. It consists of only three parts; copper wire, round magnet and battery. It produces really low voltages, which means there's no real practical application for this motor, but it sure is fun to make! Try your hands at the homopolar motor—watch the video and ...

How To: Fold an origami decorative box

Looking for a fun and useful crafts project? Learn to make the most utile (and simplest) of origami sculptures, the paper box. This video tutorial presents a complete, step-by-step overview of how to make a decorative paper box using origami, the traditional Japanese folk art of paper folding. For more information, and to get started making your own paper cubes, watch this arts-and-crafts guide.

How To: Make really simple and gross fake blood

There are a lot of recipes for fake blood online. This one is one of the simplest, and one of the grossest-looking. Just take some white corn syrup, red and blue food coloring and corn starch, mix them all together and you'll soon have an appalling concoction that will terrify your audiences and leave a stain on your rug that you'll never, ever get out.

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