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How To: Perform ballistics comparisons

In this scientific video tutorial, undergraduate students in a forensic chemistry lab demonstrate how to use a comparison microscope for bullet and bullet casing comparisons, and color developments tests for impression marking enhancement (such as for filed-off serial numbers). Learn how to perform ballistics comparisons! Just like in CSI.

How To: Quickly Launch Your Favorite App from Any Screen on Your Nexus 5

Even though there are over 1.3 million apps available for Android, we normally confine ourselves to a select few for day-to-day usage. With an average of 41 apps installed per user, most apps on our smartphones lay idle for the majority of the time we spend using them. Instead, we find ourselves constantly coming back to that small set of apps that meet almost all of our needs.

How To: Buy a used or second-hand camera lens

First of all you have to search for a reputed dealer. Then ask him all necessary questions like what sort of lenses shall fit in your camera, what shall be the size of the lens to fit in your camera. If you are going to purchase it online then you have to ask whether the surface of the lens is scratched and marked in any way. Make sure that three is no mould or scratches on the lenses. You can also hold the lens towards the sun or a light source. Do not hold it directly against the sun. Now y...

How To: Scratch on turntables for beginners

The video is from the DJ tutorial and it shows us the basic principles of scratching for the beginners. And the first lesson you should learn is that there are basically four movements and here you will actually be not going to scratch put will be moving the record forward and backward. These four moves form the basis for starting to learn scratching. First you need are the type of sounds which are either acapella (song with no music) or with sounds (tracks with breaks on it). Before starting...

How To: Prepare the right safety gear for kayaking

This video will show you the right and proper safety gear for kayaking. Kayak safety gear is one of the most important aspect of kayaking. The most important kayak safety gear is the life jacket. It should be short torso so you can move freely and it does not rise up. Make sure that all the straps are tighten when you wear it. The next important kayak safety gear is a whistle. You will use it when you are in trouble or in emergency. Blow it once to catch attention and 3 times during emergency...

How To: Change a 700Cx38 bicycle tire with baby powder

In this how-to video, you will learn how to change a 700Cx38 bicycle tire with baby powder. You need a tire tool, a new tube, new tire, baby powder, a bag, and a bicycle that needs a tire change. Run the tire tool around the rim to remove the tire Remove the old tube from the tire and check the tire for foreign objects. Take out a brand new tube and place it in a bag with baby powder. This will help the tube move around freely once installed. Inflate the tube a tiny bit, find the label on the...

How To: Do a chIn-up

Looking to better sculpt your upper body? It may seem old fashioned, but incorporating chin-ups into your workout routine is a surefire way to build your biceps and back muscles and strengthen your entire upper body.

How to Walkthrough Darksiders: The Ashlands

Defeating the Ashland level of Darksiders on the Xbox 360 means getting past Tower A, Tower B, Tower C, Tower D, The Caverns, The Ash Field, Fracture Cannon, The Arena, Abyssal Gladiator, Leviathan's Drift, Stygian and lastly… the Soul Bridge. Before you lies an ash field. This ash is to thin for you to Dash in and makes moving around in it difficult. On top of that, a giant sand worm or Ash Titan, roams around freely. This massive creature will home in War as soon as he touches the ash groun...

How To: This Galaxy S9 Camera Feature Makes It Easy to Take Pictures When Your Hands Are Full

Taking one-handed pictures with your phone can quickly devolve into a juggling act. You have to secure the phone in landscape mode (if you're doing it right), tap to focus, and then somehow hit the shutter button without shaking the device too much. Fortunately, Samsung has a nifty feature that'll help you keep a more secure grip on your Galaxy S9 or S9+ as you take photos with one hand.

News: Occipital Wants to Turn iPhones into Mixed Virtual Reality Headsets

If you're an Apple user and want an untethered virtual reality system, you're currently stuck with Google Cardboard, which doesn't hold a candle to the room scale VR provided by the HTC Vive (a headset not compatible with Macs, by the way). But spatial computing company Occipital just figured out how to use their Structure Core 3D Sensor to provide room scale VR to any smartphone headset—whether it's for an iPhone or Android.

How To: Make a "Shocking" Deck of Prank Playing Cards Packed with 330 Volts of Electricity

A deck of cards may be a magician's best way to demonstrate his or her's sleight of hand, but for the prankster, it's the perfect way to deliver a shocking 300 volts of electricity! And that's exactly what I'm going to show you how to do today. Stuart Edge used it in his "Electric Shock Kissing Prank" to show the ladies how a man can really put the sparks in a kiss.