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How To: Zap and revive old NiCad batteries with a mig welder

Nicad batteries often die in such a way that they won't take a charge and have zero voltage. This usually means they're shorted out by crystal dendrite growth. Here's a method of bringing them back to life by zapping those shorted crystal dendrites away with too much current and/or voltage. We'll use a welder as a power source. You could also use a car battery, a DC powersupply, or almost anything with some voltage. Charged-up capacitors are popular for this because you can get a very fast pu...

How To: Create a Wireless Spy Camera Using a Raspberry Pi

Surveillance is always a useful tool in a hacker's arsenal, whether deployed offensively or defensively. Watching targets yourself isn't always practical, and traditional surveillance camera systems can be costly, lacking in capabilities, or both. Today, we will use motionEyeOS running on a Raspberry Pi Zero to create a small, concealable Wi-Fi connected spy camera that is both affordable and easily concealed.

How To: Convert numbers in and out of standard form

In this video, we learn how to convert numbers in and out of standard form. Standard form is a useful way of writing down very large numbers and very small numbers. To do this, you will look at the number you have and ignore the zeros that are just at the end. Then, write down the basic numbers. Put a decimal point in this number to make it between one and ten. Now, write down x 10 and put the power for how many places the decimal point moved to get to the new number. This will help you write...

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: Add decimals together

Learn how to add the decimals together in simple and easy steps. 1. First practice adding two normal digits using the traditional adding method and get your answer correctly. 2. Now to add the decimals together use the same example by including decimal points to them. 3. The adding will also be the same traditional method except that you have to place a decimal point in the exact location of your answer. 4. Now take another example (E.g.: 3. 33+4. 2) and add it in the same way by placing a ze...

How To: Mask text using gradient in Flash

Want to learn how to mask text using gradient in Flash? In this 3 minute video, the viewers will learn just that. First of all, create the text that you want to mask. Next, prepare the gradient that you will be masking your text with, remember to set alpha to zero. Select the free transform tool and rotate the shape over the text. Now convert it into a movie clip and have the gradient shape move from one side of the text to the other using the timeline.

How To: Create an image animation using gradient in Flash

Are you interested in 2D animation in Flash? First import a image in flash. Then create a new layer and choose oval tool and take a radial gradient. In the middle of the shape, we need to have zero alpha value and pick the colors from the background of the image. Create the shape over the image and take another frame at no.10 and increase alpha. Then create another keyframe and convert it to movie clip. Then create shape and motion tween. On the new layer, write a stop command in action scrip...

How To: Find extra points for a parabola (quadractic equation)

This is a mathematical educational video on how to find extra points for a parabola. In the first two examples there is no need for finding extra points as they have five points and have zeros of the parabola. In example 3 we need to find extra points. The equation is y=4xsquare-4x+4. You can take x= -1 and get the value for y. You will get a point now. Similarly you can substitute -2 for x in the same equation and get the value for y. Now you get another point. Now you can draw the parabola.

How To: Say the numbers 0-100 in Spanish

Check out this Spanish language video that shows you how to say the numbers zero through one hundred. This is the third in the numbers videos. The prior two covered 1-15 and the second 0-39. In this language video we go all the way to 100. Practice your Spanish language skills and improve your pronunciation of the numbers 0-100 in Spanish. Hope this helps.

How To: Create a silver and purple eyeshadow look

Learn how to apply silver and purple eyeshadow with this make up tutorial. To achieve this look you will need the following products MAC Studio Fix Fluid, Bare Escentuals Mineral Veil, Nars Laguna Bronzer, Nars Orgasm Blush, Urban Decay Primer Potion, MAC Silver Fog Pigment, MAC Ransom eyeshadow, MAC Zero eyeshadow, MAC Midnight Cowgirl eyeshadow, MAC 24/7 Eyeliner in “Dime”, Clinique High Definition Mascara, MAC Lipstick in Jubilee, MAC Tendertone in Sweet Tooth. This is a gorgeous silver an...

How To: Create a hot bombshell look with MAC makeup

Turn heads where ever you go with this gorgeous bombshell makeup look. This look uses the following products MAC Studio Fix Fluid, BE Foundation, Nars Laguna Bronzer, Pleasantry blush, MAC Cream Base in “pearl”, MAC Painterly Paintpot, MAC Black Tied eyeshadow, MAC Wedge eyeshadow, MAC White Frost eyeshadow, MAC Blacktrack Fluidline, Urban Decay 24/7 Eyeliner in “zero”, Clinique High Definition Mascara, NYC Falsies, NYX lipstick in “Heiress”, any frosty pink lipgloss. With the tips from this ...

News: Pokémon GO's Nearby Menu Is Lying to You—Here's Why All the Pokémon Have 3 Footprints

The easiest way to see which Pokémon are close to your current location in Pokémon GO is by checking the Nearby tracker in the bottom-right of your screen. At least this was the easiest way up until a few days ago. Initially, the Pokémon in the Nearby screen would be marked with between zero and three footprint icons—the more footprints, the further away a Pokémon is from your location. Pokémon with zero footprints should be visible to you.

How To: Count cards in Blackjack

In this video, we learn how to count cards in Blackjack. In blackjack, the cards 2-6 are counted as plus one. Seven through nine are counted as plus 0 and the rest are counted as plus zero. What this means, is if you have two cards, they can cancel each other out depending on what "plus" they are. The counts that are minus one will give the edge to the casino, not to you. You want the edge to be a plus, because this means there are higher cards that are in the deck. Simply look at the counts ...

How To: Identify number types

In this video, we learn how to identify number types. You will need to figure out what numbers from a list is a rational numbers in your math equations. A natural number is a counting number (1,2,3). A whole number is a natural number and zero (0,1,2,3). An integer is a whole number and a negative whole (-2,-1,0,1,2). A rational number is any number that can be expressed as a ration of integers. An irrational number is any number that's not rational and non-perfect. Once you understand these ...

How To: Create Taylor Swift's 2010 VMAs '40s makeup look

We always knew that Taylor Swift was a bombshell, but it wasn't until her 2010 VMAs performance that we saw just what a retro doll she could be. While Swift usually favors light and bright makeup colors that emphasize, rather than overwhelm, her natural beauty, she went all out for the awards show.

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...

How To: Convert fractions to decimals

In this tutorial, we learn how to divide fractions into decimals. First, you will want to divide your numerator by your denominator. If you can simplify this number further, it will make it easier for you to divide. You can do this on the calculator, or you can do it by hand. The numerator will go on the outside of the division sign and the denominator will go on the inside. When you divide, you will come up with a decimal. If you have an improper fraction, you will probably end up with (1.so...

How To: Match exponential graphs

This video tutorial belongs to the Education category which is going to show you how to match exponential graphs. The video shows two graph sheets with three graphs marked A to F on each sheet and six equations. It starts off with matching the basic function, y = 2 to the power x. If you plug in zero for x, you get '2 to the power 0' which is 1. Hence, the equation becomes; y = 1. So, the graph that passes through y = 1 is the matching one. In the video it is graph A. You can watch the video ...

How To: Mutliply rational numbers and understand word problems

Rational numbers are numbers that can be expressed in the form of a/b, where a, b are integers and b is not equal to zero. Rational numbers are also called as fractions. Multiplication of fractions is very simple and straight forward. Two multiply two fractions a/b, c/d first multiply both the numerators to arrive at the new numerator. Next multiply both the denominators to arrive at the new denominator. Now the new fraction can be further simplified to arrive at the solution. Note that you a...

How To: Change fractions to decimals using decimal division

This video is about changing fractions to decimals. The teacher uses 1/2 and 1/3 as his examples. The first one, changing 1/2 to a decimal. First step is to divide your denominator into your numerator. So, you divide 2 into 1 and add the decimal to your 1 because 2 does not go into one as a whole. Add a zero after your decimal. Put your decimal above, as well. Then, divide 10 by 2, which equals 5. Your answer goes above the last numeral (the 0), which gives you .5 .

How To: Bring more life into your photos using Photoshop

Clicks are made on "Image",then "Adjustments", followed by "Brightness/Contrast" ; contrast is set to 30 and brightness is set to 60 to add more light to the picture. "Adjustment", "Variations" are clicked in that order and both yellow and red are increased. "Filter", "Render", "Lightening Effects" are chosen in that order and a new window appears; within which the style is set to "Soft Omni". The brightness is decreased ;similar to the way it was increased, and contrast is increased to 60. T...

How To: Create date labels with YEAR, DATE & TEXT in MS Excel

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 300th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the YEAR, DATE and TEXT functions and the ampersand (concatenation) to create a date label that adds leading zeros appropriately.

How To: Cancel out in basic algebra

This video gives you brief tutorial on simplifying expressions, or canceling out common factors. He starts out by answering the question "What is canceling?" and demonstrates a basic example. You find the greatest common factor between the numerator and denominator, which you then divide both by. This can also be done if you have variables in your fraction. He then shows it can be done the same way if you have binomials in your fractions. However, you must be careful that the denominator does...

How To: Set rotor blade pitch and speed on a Honey Bee King 3

Alishanmao demonstrates on a Honey Bee King 3, how to change the pitch and speed. Using the radio knob in the controller you can change the pitch of the main rotor. Make sure your 3D switch is off, that your throttle is at zero, and after connecting the battery, do not move the battery until you here it beep to confirm it is ready. When pitch is at its minimum you will have less rotation speed and at its maximum you will have a higher rotation speed. The best thing to do is to try and find a ...

How To: Do long multiplication

In this video the instructor gives you sample as of how to SLEP long multiplication. You start by breaking the numbers up to simpler forms. If you have a two digit number that your multiplying by a another two digit number you multiply the first two digit number and then buy the second digit of the second two digit number. You have to remember to carry the remainders. You then add your two multiplicative lines together giving you the sum. this can be done to cover any set of multi-digit numbe...

How To: Write a logarithm as a sum or difference of logarithms

This video shows the method to write a logarithm as a sum or difference of logarithms. The square root of the term given is taken out as half according to the rule. Then the numerator and denominator is divided into product of factors. This is broken into the difference of numerator and denominator according to the rule. Finally, the product of factors is expressed as the sum of factors. Now we see the domain of the term. As the term is a square root of the term it should be greater than zero...