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How To: Integrate by parts in calculus

Reverse the product rule to integrate by parts! 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 (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to do integration by parts.

How To: Play "Is This Love" by Bob Marley on ukulele

The song, This Love by Bob Marley, is played in G minor. The first verse is played in single beat strumming in Gm, Cm, and Dm. He takes you through this pattern of chords five times. Then on to the chorus, two chords are played: Dm and Cm also in single strums. The breakdown is broke into four different frets down the neck. The 13th fret is held and demonstrated a few times, Then it starts in a double strum. The breakdown is reversed going up the neck of the ukulele. Further assistance is off...

How To: Replace a hard drive in a 15" macbook Pro

The video starts by informing about the basic safety precautions, tools needed and backing up data prior to hard drive replacement. There are a series of screws which need to be removed in the following order.1. Removing the battery from the back and then remove three screws thereby removing the RAM cover.2. Two more screws to be removed under the RAM cover.3. Two screws from inside front edge.4. Four screws from the bottom rear.5. Two screws each from the slim sides.6. Two screws near the hi...

How To: Install the TechT Lightning Rod on a paintball gun

In this video, our author, KRASHARPSHOOTER, shows us how to install a TechT Lightning Rod. First we remove the screw on the underside, and turn it over and remove the four base screws. Now lift up on the piston housing and remove it. Then, remove the nut and the tension guide. Now you can remove your ratchet axle and rod. Now remove the pin that hoods the ratchet rod and axle together.

How To: Extend your upper range while singing

In this video, Kevin Richards teaches us some vocal exercises and how to expand the upper range of the head register voice for singing. The exercise, a "reverse octave", involves starting at a high note (in the head register) with a "He" sound, and singing down an octave to end up with a "Ya" sound. The purpose of this is that making the "h" sound in "He" works the diaphragm. Richards will explain this and demonstrate it in the video. After learning how to do the exercise, you will learn help...

How To: Do a low free kick in FIFA 09

Being able to shoot a low free kick can lead to a lot of goals in Fifa 2009. This video will show you the various ways you can take a low free kick and gives you quick, to the point instructions on how to execute them. Keep in mind that not every player can do this, so be mindful that you have a skilled free kick taker before attempting. Watch this video, practice, and start crushing the competition!

How To: Fold an origami two-cup pencil holder

This how-to video show you how to make an origami two-cup pencil holder. The narrator explains that you will need one eight and a half inch by 11 inch piece of office paper. This video show everything you need to know from folding every single predrawn line and reversing them, to all the precise folds necessary to create this pencil holder. If you follow the meticulous instructions showed in this video you can create your own two cup pencil holder using origami techniques.

How To: Play xiangqi, also known as Chinese chess

Chinese chess is the world’s most popular board game. Chinese chess, also known as xiangqi, has been played throughout East Asia for over 1000 years. The playing pieces have traditionally been identified using Chinese characters, so only those who could read Chinese characters could play. Now, Chinese chess is available in a set in which the pieces are identified by symbols on one side and Chinese characters on the reverse side so that anyone can enjoy this challenging strategy game.

How To: Play as Pit and Metaknight on Super Smash Bros Brawl

In this Super Smash Bros Brawl (SSBB) for the Nintendo Wii video, I showcase how Pit and Metaknight work, including their move properties and what I believe will be key strategies to learn with them in the long run. I came into this video with a plan, written on paper, so I showcase practically everything about these characters!

How To: Create a Bind Shell in Python

Hi guys, I'm gonna keep this short because I got assignments and a lot of notes to study and also other how-tos and forums to reads. lol...Since I'm keeping this short...no story time just scenario. And I want to thank n3stor for giving me the idea to post this.

How To: Add fractions together

In this video, we learn how to add fractions together. First, try doing a simple equation like 1/2 + 1/2. From here, you will simply just add together across the board. Once you get the answer, it will be 2/4, but you must simplify this so it's lower. Check this and do the reverse to make sure it's correct. Do this for all of the fractions that come your way and you will be doing fractions more easily each time! Just make sure you simplify when you reach the end, or the answer will not be cor...

How To: Evaluate functions by substituting in the variable to the input given

In this video, we learn how to evaluate functions. When evaluating functions, you substitute in the variable to the input given. Once you do this, you will rewrite the equation filing in the appropriate spots with the numbers that you are given. After this, you will evaluate the equation with the proper steps in math. Once you have figured out the problem, you can do this in reverse to make sure you have the correct answer. This is a very easy process and it doesn't take that long. Just make ...

How To: Edge a knitted piece with the crab stitch

In this video, we learn how to edge a knitted piece with a crab stitch. First, attach your yarn to the left edge of your work. After this, work one chain stitch, then go backwards with the hook. Insert it into the fabric and grab the yarn and pull it through the loop. Go around the yarn again and pull it through again. Keep going backwards and grabbing more yarn as you go in reverse. You are working with one loop on the needle while going into the fabric. Make sure you're consistent with the ...

How To: Print an Excel worksheet or workbook with gridlines

In this video tutorial, viewers learn how to print the gridlines with a Microsoft Excel spreadsheet. This task is very fast, easy and simple to do. By default, Microsoft Excel will not print a spreadsheet with the gridlines. Begin by clicking on the Page Layout tab. In the Sheet Options box, under gridlines, check Print. To remove the gridlines, do the reverse of this operation. To view the page with gridlines, click on the Office button, go to Print and select Print Preview. This video will ...

How To: Replace a keyboard for Acer Aspire One 10.1 netbook

In this Computers & Programming video tutorial you will learn how to replace a keyboard for Acer Aspire One 10.1 netbook. Disconnect the netbook from the power supply and remove the battery. You can use a small flat screw driver or a razor blade for replacing the keyboard. You don't have to remove any screws. You need to unlatch three tabs; one located above the f8 key and two on either side of the keyboard. With the razor blade unlatch the tab above f8, and then the two side tabs as shown in...

How To: Solve complex indefinite integrals in calculus

In this video the math teacher explains the meaning of the indefinite integral formula in calculus by stating it in terms of antiderivatives. He then shows in general terms how this indefinite integral formula has a related derivative formula, i.e. if the derivative of F(x) is f(x) then the indefinite integral of f(x) is F(x) plus a constant term (C). With this general relationship the teacher takes us through three related examples where he converts a derivative formula to an integral formul...

How To: Maintain the Tippmann A-5 power tube and valve

In this how-to video, you will learn how to maintain a Tippman A-5 Power Tube and Valve. First, pull the valve out of the power tube. Grab the pin with a pair of pliers and give it a firm yank. Next, remove the o-ring and set it aside. Remove the other o-ring off the back. A washer, spring, and plunger will fall out. Remove the other o-ring and valve seat with the tool shown. Now, you can oil the o-rings back up and re-assemble the power tube and valve. Follow the above steps in the reverse o...

How To: Do a reverse French braid like Lauren Conrad

This video shows how to make an inside-out French braid across the front of the head. First divide the hair into three pieces like a normal braid at the very front off to one side. Instead of braiding the normal way, make the middle piece go over the top alternately on the left and right. Keep picking up more hair and adding it in, like you would do for a normal French braid. Continue braiding across the top front of the hair. The braids can be done tightly or loosely however you like, and th...

How To: Replace a space bar on a Dell laptop keyboard

Is the spacebar on your keyboard out of whack? This simple video will show you how to re-seat it in less than two minutes. Start by using your fingers (or a small screwdriver or spudger if needed) to gently pry up along the top of the spacebar, working from one direction to another. Continue working along the top until the key is free from its mounting clips. Observe the location of the mounting clips. After the key is free from the keyboard, you can also remove the metal support bar from the...

How To: Decorate a cake from start to finish

This is an instructional video on how to decorate a cake with icing in a basket-weave pattern. You start out by measuring out the cake and placing evenly spaced marks along the side so you know where to put each line in the weave pattern. You then use a flat, rigged tip and drag the icing horizontally from one of your lines to the next line. They suggest using a turn table so you can easily access the entire cake. Then they teach you how to put a "shell border" on your cake by using a differe...

How To: DJ the mirrored double click flare combo scratch

He starts off performing the task that he then describes. It's one technique that is called a mirrored double click flare. This is done by moving the record forward a double click and then back a double click then forward a single click. The whole process is then done in reverse, starting with moving the record back a double click. On his DJ table he moves a cross fader to mirror his movement of the record. First start the technique slow without a beat to get the movement memorizes. Add a bea...

How To: Divide basic fractions

For people who do not know how to divide basic fractions or who would like to refresh themselves or get some exercise in doing so, this video will show you a few quick and simple examples to get you started. In order to divide fractions, you will need to keep the first number the way it is and then take the second fraction which you are diving by and flip it upside down, so the numbers are reversed. You then multiply both the top and the bottom numbers together to get your final answer.

How To: Do the Mach 5 yo-yo trick

The Mach 5 has a cool name, and it's a cool yo-yo-trick. It's not an easy trick for beginners, but if you have some experience you can pick it up. This video tutorial will teach you how to do the Mach 5 and wow the crowds.

How To: Build a beam bot twin motor robot base

This robot is BEAM bot inspired. First we build up the Motor Drive, an excellent and cheap Robot Bot-Base. We start with the Tamiya kit, get it going, then strap on a battery and a drag wheel, center the drag wheel. Tape it all in place with bright yellow tape and make a BEAM Bot with batteries. Plans for this BEAM framework are to add smarts.

How To: Obtain an international driving permit

This video is provided by "Betty Sell" from AAA travels. In this video she tells about the international travel and also about the important documents to be carried while carrying out an international travel, that is the international driving permit, commonly called as an IDP. It's very important to carry an IDP while traveling overseas because an IDP acts as an important recognizable form of photo identification which helps us to communicate with foreign authorities. To get more information ...

How To: Unlock Apple's 'Dark Mode' in iOS 11, 12 & 13 for iPhone

Apple gave us the ability to invert colors on the screen a very long time ago. Then they gave us grayscale mode in iOS 8, Night Shift in iOS 9, and the red screen filter in iOS 10. While the long-awaited "Dark Mode" finally appeared in iOS 13, iOS 11 and iOS 12 both have a decent placeholder for it you can use on your iPhone.

How To: Putt in World Golf Tour

In this video we learn how to putt in World Golf Tour. When putting, you need to determine where and how hard to hit your putt by reading the green. Click reverse to see the putt from behind the hole. The severity of the break is shown by the dots on the grid and how fast they are moving. Next, read the slope of the grid by looking at the colors on the green. The pointer will also tell you how much uphill or downhill there is on the putt. Then, adjust your pointer to where you want to hit it ...

How To: Do a Chinese cupping back massage

In this tutorial, we learn how to do a Chinese cupping back massage. Cupping is an old technique that is still practiced in China and eastern Europe. First, set fire to some cotton balls. Now, place them into the cup and pull the air out of the cup. Quickly place the cup on the body and then push it around on the skin. This brings the muscle up to the top of the skin, leaving marks on the body temporarily. As you move them around, it's like you are getting a reverse massage that will make you...

How To: Find the surface area of a cube

In this video, we learn how to find the surface area of a cube. Finding the surface area of a cube is something everyone will have to do in math. The easy formula to figure out this is: surface area= side x side x 6. Your first step to figuring out the problem is to find the length of a side. Once you have found this, you will substitute and evaluate the numbers in the equation. After this, write the units in for the problem. You will then come up with the answer of the equation with the unit...

How To: Solve a single-step equation using multiplication

In this video, we learn how to solve a single-step equation using multiplication. For the first step, get rid of any number surrounding the variable. To do this, you will need to multiply the numbers around it by their opposite to make them equal zero. Once you have done this, you will need to repeat the process on the other side of the equal sign. Just do the same exact thing you did in the first step, then you will be able to easily solve the problem at hand. You can check your answer by re...