Find out how everything in a chemistry lab works, from pipettes to burners to recrystallization to storage. You'll get precise instructions on how to work and perform certain scientific duties in the chem lab, whether it's chemical or just ordinary high school science.
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...
This instructional video, produced by Jewish Pathways, demonstrates how to perform Havdallah after Shabbat ends. Hadvallah is a Jewish religious ceremony that marks the symbolic end of Shabbat and holidays, ushering in the new week.
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).
Before the feminist movement gained prominence in America, there was a man named Al Capp. Capp was creator of the hillbilly comic strip Li'l Abner (1934-1977), and in 1937, his Sadie Hawkins Day spilled out into reality as the pseudo-holiday practiced throughout schools and colleges, where girls asked boys to the dance.
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...
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.
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...
Love doing science experiments? Want to impress your friends with your science skills and look good? Then you must watch this video.
*Iris is out there to demonstrate how to use the flat iron to get the waves in your hair *She is going to show how to get the Hollywood style waves in your hair.
With a little time, you can turn a pair of rabbits into lifetime bunny buddies. Step 1
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...
Nowadays, most appliances have many new features that make cooking much easier for homeowners. One of those features is called Sabbath mode. It's a feature that can be found on ovens and refrigerators and is intended to allow the appliances to be used by Shabbat observed Jews during Shabbat and other Jewish holidays.
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...
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.
Keep your stargazing sights and new experiences logged in a journal. Watch Amateur Astronomy for Beginners - The Astronomical Journal.
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:
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...
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.
At the Google I/O keynote presentation today, Clay Bavor, Vice President of Virtual Reality for Google, shared a number of new initiatives in virtual and augmented reality. This included new services for the Tango platform called visual positioning service, or VPS.
Move over whole wheat — white bread may be back in style after a new study shows that it may be your gut microbes that decide what kind of bread is best for you.
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.
The body's usual response to a bacterial infection in the blood — called sepsis — takes time. It requires a carefully orchestrated sequence of events that gets the body's immune system ramped up to deal with the invading bacteria.
The Deepwater Horizon oil spill that began on April 20, 2010, was the largest maritime oil spill in history. Killing 11 people and discharging 4.1 million barrels of oil and natural gas into the Gulf of Mexico, the event was an unparalleled personal, environmental, and business disaster. It was also the first major oil spill to take place in the deep ocean.
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.
New weapons are needed to combat antibiotic-resistant bacteria. Instead of drugs, scientists have discovered in an animal study that they may be able to harness vampire bacteria to vanquish pneumonia.
Exposed to hormones, pharmaceuticals, and other chemicals, the beautiful wild fish in Canada's Grand River have taken on some pretty odd characteristics—they're turning into females. A long-term study suggests using bacteria to manage polluted water could turn the tide for feminized fish.
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.
According The Venture Reality Fund, the introductions of Facebook's camera platform and Apple's ARKit catalyzed increased activity among companies developing consumer applications.
With most augmented and mixed reality devices, you wear a purchased headset and use it alone, in a place of your choice—but not this one. Ben Sax decided to reinvent the binoculars to create a mixed reality experience that anyone can walk up to and try for free. He calls it the Perceptoscope.
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.
Like most people, you probably use hand gestures when you talk, whether you wave your hands excitedly when discussing the latest episode of Game of Thrones or smack the back of your hand as you rattle off points during an argument. As your speech teacher probably told you, gesturing while talking is a great reinforcement tool—when used appropriately, of course.
As you have no doubt observed, brothers and sisters do not mate. While they may find one another attractive, they find the notion of sex with one another repulsive. This is because a child produced by siblings has a high probability of sharing the same recessive genes, and recessive genes are often harmful unless coupled with dominant genes.
With developers chomping at the bit to play with ARKit 2.0, Unity has updated its ARKit plugin to enable access to the new augmented reality superpowers of the toolkit.
At Google's I/O developer conference keynote on Tuesday, ARCore may have been absent, but Google did preview a potentially trailblazing augmented reality feature for Google Maps.
Despite mounting scientific evidence that viruses can cause changes in learning and memory, the reasons have remained elusive.
Modern warfare takes on a more literal translation with the advent of new augmented reality displays revealed recently by the US Army to improve soldiers' situational awareness on the battlefield.
March is looking to be an eventful month for Apple. Even with coronavirus throwing the tech industry into uncertainty, we still expect Apple to release the iPhone SE 2, the long-awaited follow up to the iPhone SE. Is it possible we'll also see iOS 13.4 fully released this month? We wouldn't be surprised if we do, seeing as Apple just released its fourth developer beta.
Samsung, like other OEMs, partners with third-party companies to include their apps on Galaxy devices. For example, Microsoft pays Samsung millions to pre-install certain Office apps. But one of these partners might not be on the up and up.
Those going on crazy off-road adventures, taking their inspiration from various SUV commercials, are likely to encounter many unexpected, all-terrain dangers.
