Chemical Methods Search Results

How To: Use the Switch Case and Random methods when coding in PHP

In this clip, you'll learn how to the Switch Case method and the Random method when coding in PHP. Whether you're new to the PHP: Hypertext Preprocessor scripting language or are a seasoned web developer merely looking to improve your chops, you're sure to find benefit in this free video programming lesson. For more information, including detailed, step-by-step instructions, take a look.

How To: Fake a Loch Ness photo

This video will show you some methods to create a fake Loch Ness monster photo. You will need a camera or a camera phone for this project. One method of faking a sea monster picture involves creating a clay model of a head and a neck of a sea monster and holding it underwater. The outline of your hand holding the clay will serve as the body of the monster. Another method which can be used to fake a sea monster can be done using a clothes hanger and holding it underwater. The hook of the hange...

How To: Solve a system of equations w/ the elimination method

The video shows us how to solve a system of equations with the elimination method. First write the two equations one on top of the other, as it is going to be elimination method and it is recommended to write it in that way. Here the 2 equations are x+y=-3 and x-y=1. In the elimination method we need to add the 2 equations by columns. So adding it column wise we get to have 2x=-2 and solving this we will get the value of x=-1. Then you need to substitute this value of x in any of the two equa...

How To: Solve a Rubik's Cube with the "winter variation"

The video shows a unique method of solving a Rubik's cube. The method is called F2LL or 'winter variation'. There is very little information about this method on the internet. It deals with Corner Orientation. The person in the video is a skilled cube handler. There are 27 algorithms and their mirrors in the F2LL method. While you form an F2LL pair, you need to orient the corners at the same time. This method makes cube solving all the more easy.

How To: Reduce fractions in math problems

In this math tutorial, you will learn how to reduce fractions using the prime factoring method. The narrator, a math teacher, of the video begins by defining what prime numbers are. This is important to know. When reducing fractions you need to reduce both the numerator and the denominator down to numbers that cannot be reduced by any other numbers but 1 and itself (prime numbers). The method the video teaches is to find the prime factors of both numerator and the denominator to simplify the ...

How To: Use the Complex Trinomial factoring method

A video from free math tutoring that teaches you a method of factorization of a complex polynomial. The tutor shown in the video demonstrates how to factorize common functions of a variable by the factor method. This video isn't for advanced learners of mathematics. It is for beginner to intermediate level viewers.

How To: Solve a Rubik's Cube F2L with the Fridrich Method

A great way to rack your brain is by trying to solve a puzzle, so grab your puzzle and get solving! If you need a little help, this two-part video tutorial will show you how to solve the classic Rubik's Cube F2L with the Fridrich Method. The 3x3 Rubik's Cube is one of the most baffling puzzles on the market today, so make sure your up to speed on solving it. Watch and learn a few algorithms to get your puzzle solved! Wait, there are no algorithms for the Jessica Fridrich Method when solving t...

How To: Solve a Rubik's Cube with the Compound OLL method

Find out a new way to solve the Rubik's Cube made famous by Erno Rubik, master puzzle maker. Try to get the OLL (Orientation of the Last Layer) using a new method that lets you look at the cube and figure out a two algorithm move solution to orienting them correctly. Just watch this video tutorial to see how to solve a Rubik's Cube with the Compound OLL method.

How To: Attach bicycle handlebar tape

There are lots of methods of wrapping bar-tape. This is the top down method and requires no electrician's tape to fasten the end of the tape to the bicycle handlebars. Tke a look at this tutorial and learn how to attach it by the top down method.

How To: Solve the Rubik's Cube with the Fridrich f2l method

Solve the Rubik's Cube with the Fridrich f2l method using tips from this how-to video. Start by making a cross on one side of your Rubik's Cube. After that, flip over your Rubik's Cube and watch the video to learn exactly what to do next--do you think you're going to read it here? Eventually, you'll get the Fridrich f2l method down, it's a promise!

How To: Solve a 2x2 Rubik's Cube

If you aren't as advanced as you want to be, then use this method to solve a 2x2 Eastsheen Cube, because the Rubik's isn't really that good. If you are advanced, then watch the second vide for the über-complex method, the Guimond Method.

How To: Pack a skydiving parachute using the psycho method

A brief video that illustrates parachute packing using the 'psycho method'. Part 1 of 2 shows the steps of; Sorting the 9 cells, slider, stabelisers, wrapping of the tail, flipping the pack job on its back, untwisting d-bag and cocking the pilot chute. Part 2 illustrates the final stages of the pack job called the 'psycho method'. These steps include; Making sure the pilot chute is cocked, roling the left 4 cells left, the other 4 cells right,the9th cell position, slider adjusting or 'pouting...

How To: Solve reverse percentage problems

We know the method for answering the question "What is the x percent of y" but, what about the answer to the following question "The x percent discounted price of an article is y. Find the original price." This is a reverse percentage problem that can be solved using the method shown in this video. This video contains three reverse percentage problems. The first two problems are essentially of the same type as explained above. A simple and easy to understand method of finding the original pri...

How To: Multiply polynomials with the FOIL method

Looking for a primer on how to solve polynomials via the FOIL approach in basic algebra? 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...

News: Bacteria Turned into Factories, Supplying Critical Enzymes to Make Cancer Drugs Cheaper & Save Endangered Yew Trees

Cytochrome P450 (P450s) are proteins found in nearly all living organisms, which play roles that range from producing essential compounds and hormones to metabolizing drugs and toxins. We use some of the compounds synthesized by P450 in plants as medical treatments, but the slow growth and limited supply of these plants have put the drugs' availability in jeopardy and jacked up prices.

How To: Do tabata training method exercises

Jennifer DiDonato shows us how to do a tabata training method exercise in this tutorial. The tabata method includes: doing an exercise for 20 seconds non-stop, then resting for 10 seconds, then repeat 7 more times, and this will result in 8 total exercises. Make sure you log your progress onto a chart. The first exercise you can do with this method is the alternating jack-knife crunch. First, lay down while keeping one leg straight and bring your upper body up while switching legs into the ai...

How To: See who's using your wireless network on a Windows PC

This video shows you the method to find if someone else is using your Internet connection. There are two methods for this. The first method involves opening the start menu and click on 'Run'. Type cmd in the text box which opens as a result of clicking on 'Run'. Type NET VIEW at the command prompt. This will show all people using your network. The second method involves going to Start menu. Go to Connect to and Show all connections. Click on My network places. Click on 'View workgroup compute...

How To: Make homemade bread crumbs

This video demonstrates how bread crumbs can easily be made at home. Two methods are shown for this. For both the methods first bread has to be dried in oven at 230 degrees. For this you can use fresh bread or stale bread. After heating the bread should become dry and hard. In the first method, break the dried bread into smaller pieces and put in a blender. Start the blender and crush them. Your bread crumbs are ready. In the second method Put the dried bread in a plastic bag and close the ba...

How To: Factor trinomials with the "swing method"

This is a very interesting educational video on how to find the factor trinomials using the swing method. Let us take an example and find the factor trinomials for 2xsquare-13x-45. Let us use the swing method. So now we will get 2xsquare -13x-45. You have to find the suitable factors of 90. It is 18 and 5. If you multiply 18 by 5 you will get 90. You will get (x-18over2)(x+5over2). The final answer is (x-9)(2x+5). Now we have found out the factor trinomials of 2xsquare-13x-45. This swing meth...

How To: Solve a linear system with no solution

A method for solving a linear system with no solution is described. The method is described in 4 steps. The first step in the method is designed to solve a linear system that is described consist of “solving by graphing”. Details for “solving by graphing” first consist of finding points to graph using two different equations. The second step in the method consist of placing the points from both equations on the same graph in order to find out if bo...

How To: Eject and recover a stuck DVD on a Mac

In this video tutorial, viewers learn how to eject and recover a stuck CD or DVD on a Mac computer. There are several ways to eject a disc. The first method is to click on File and select Eject. The second method is to press the Command and E buttons on the keyboard. The third method is to click on the disc and drag it to the eject icon in the dock. The fourth method is to access Disc Utility in the Utility folder. Then click on the disc drive and click on the eject button. This video will be...

How To: Solve a system of equations with the comparison method

In this video tutorial the instructor shows how to solve equations by the comparison method. In this method he isolates either the x or y variables in both the equations and now compares the other side of equations directly to derive the value of the other variable. Now this derived value of the variable can be used by substituting it in one of the original variables to derive the value of the other variable. He goes on and shows how to do this with an example by solving it. This video gives ...