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How To: Understand organic molecules & elimination reaction

This video helps us understand the organic molecules and elimination reaction. Take some sugar in a beaker. Sugar has 12 carbon atoms, 22 hydrogen atoms and 11 atoms of oxygen. The sulphuric acid is poured into the sugar and the color change is observed. The color of the sugar gradually changes into black. The sulphuric acid causes an exothermic reaction which releases a large amount of sulphur dioxide gas. All the water (containing hydrogen and oxygen atoms) is eliminated out of the sugar du...

How To: Light the Shabbat candles to usher in the Holy Day

This instructional video, produced by Jewish Pathways, demonstrates how to light the Shabbat candles. The lighting of Shabbat candles not only ushers in the Holy Day, but is also a special time of spiritual contemplation for Judaists. It is the pivotal moment when we cross over from the weekday into the holiness of Shabbat (or Shabbos, the Jewish Sabbath).

How To: Identify and control the pine tip moth

This is a tutorial for controlling the Pine tip moth. Identifying and controlling the pine tip moth consists of studying the small plants of pine. The attacks on pine trees is caused by Nantucket pine tree moth found along the Rio Grande Valley as far north as Espanola, it has spread to South Arizona and California by importing grafts from Mexico. The moths are 3/8 inch long reddish brown to grey in color. They attack the main stem of the baby plant and the pines instead of growing vertical g...

How To: Test for boron with curcumin

Want to test whether the soil sample or a water sample contains boron, watch this video. As shown in the video, the first step is to create test specimens of various concentrations using a simple turmeric and ethanol solution as a base for comparison. The basis of this experiment is the fact that curumin present in turmeric reacts with boron to form a reddish compound and so the result of this reaction can easily be verified visually.

How To: Interpret a standard deviation

A rough definition of standard deviation is that it is a measure of expressing the observed variations about the average in statistical data i.e. by how much do the observed values vary from the mean. This video continues from the previous solved example and demonstrates the mathematical interpretation of the standard deviation that was calculated. We begin with stating the mean and standard deviation values and then calculating the upper and lower bounds of the data based on the standard dev...

How To: Make a maple leaf with two balloons

This video shows viewers how to create a maple leaf using two long balloons which are used for making animal balloons. You will begin by inflating the first balloon, leaving a few inches of empty space at the end of the balloon. Begin by making two small bubbles by twisting the balloon and creating consecutive bubbles in the balloon. Follow these with two larger bubbles and 3 more smaller ones, to create a hexagon shape. Continue to create small bubbles, folding them into each other to create...

How To: Measure yourself for a custom fit pant

This is a very useful instructional video on how to measure yourself for a custom fit pant. This is a very simple process that is explained very clearly in this video visually. You need a measuring tape to measure yourself. The three important points of measurement are waist, hip and inseam. The first step is to measure your natural waist. The next step is to measure the fullest part of your hip. Then you have to measure the inseam of a pair of pants. Any one who watches this video will learn...

How To: Become more flexible with yoga

Flexibility is generally defined as the range of motion of the joints. It is the ability to bend and stretch easily without too much effort. Flexibility depends upon various factors like the state of the joints, muscles, length and looseness of muscles, shape of bones, age etc. Some medical conditions like arthritis can affect flexibility.

How To: Pull a three easy prank combo with a hot pocket, sink sprayer, and vodka

We've all heard that death comes in threes. In our tireless hours of prank research here at Wonderhowto, we've observed that pranks often do as well. By stringing three simple pranks together, you can achieve all of the annoyance and laughter of a much more elaborate / expensive / dangerous prank. In this video, you will learn how to set up one combination prank that requires only simple things:

How To: Simplify algebraic expressions with negative exponents

This video explains the process of simplifying an algebraic expression with negative exponents. The video starts with an example of such an algebraic expression; the expression contains negative powers in both the numerator and denominator. The location of the negative exponents is first pointed out visually. Next, it is observed that there are like based or variables in both the numerator and denominator; however, it is explained that the numerator must first be expanded before the expressio...

How To: Perform the Barus effect

Watch this instructional science video to observe the Barus effect in action. A dyed solution of POLYOX (polyethylene oxide - it is the stuff used as the lubricant on the strip found in all modern razors) is extruded from a 50 mL syringe. On exit, a marked swelling in the liquid stream several times the diameter of the orifice is observed. The effect is referred to as the Barus Effect, but it also goes by several other names including the Merrington Effect, Die Swell, and Extrudate Swell.

Today's Tidbit: Know Your Limitations

Dianne Tice and Roy Baumeister gave a bunch of college students a questionnaire in which the students answered questions about their work habits. In a class which she taught, Tice also assigned a paper with a deadline which she said could be extended and observed which students availed themselves of the option to extend.

News: Scientists Are Using the Special Physics of Dragonfly Wings to Create Surfaces That Shred Bacteria on Contact

As drug-resistant bacteria become more commonplace, researchers are looking for new antibacterial strategies to disrupt disease-causing microbes. Some scientists are working to create new drugs, while others are trying out drug combinations. Another group, however, are ditching pharmaceuticals altogether and experimenting with non-drug alternatives.

News: TV Chefs Are Terrible at Handling Food Safely

The food TV chefs prepare make our mouths water. From one scrumptious creation to another, they fly through preparation without frustration or error. They make us think we can do the same with similar ease and delectable, picture-perfect results. Some of us have noticed, though, that these TV chefs don't always adhere to the same safe food handling guidelines we've been taught to follow.

Guide: Wi-Fi Cards and Chipsets

Greetings aspiring hackers. I have observed an increasing number of questions, both here on Null-Byte and on other forums, regarding the decision of which USB wireless network adapter to pick from when performing Wi-Fi hacks. So in today's guide I will be tackling this dilemma. First I will explain the ideal requirements, then I will cover chipsets, and lastly I will talk about examples of wireless cards and my personal recommendations. Without further ado, let's cut to the chase.

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