A percent problem is one in which you are given a quantity and asked to compute the value of a percent of it. You may also be given the whole quantity and a part of it and asked to compute the percentage of the part in the whole. To do these kind of problems you need to use the rule which states that the ratio of the part to the base it equal to the ratio of the percent to hundred. That is part/base = percent/100. This comes from the definition of percentage which states that percentage is eq...

This video shows how to use optimization methods in calculus. Optimization means finding the maximum or minimum values of a quantity or finding when the maximum or minimum occurs.What quantities are optimized in economics?we want to minimize costs or maximize revenue.First steps in any optimization problem1.Identify the quantity to be optimized i.e., read the problem exactly what is exactly maximized or minimized.2.Identified the feasible domain. This is important because the math we can opti...

Watch this science video tutorial from Nurd Rage on how to make nitric acid. They show three ways to make nitric acid based on two different chemical approaches, both of which can be done using easily accessible materials.

The 1931 Model A Ford is a classic, but like many classic cars owning one means investing substantial time and money into maintenance and repairs. If the brakes are giving you a lot of trouble in your Model A (and when are they not?) it may be time to adjust them. This video will show you how to do just that.

In this video, the instructor shows how to identify the percentage change using proportions. When a given quantity increases or decreases by certain amount then we can calculate the percentage change in the quantity, which can be either increase or decrease based on the new value of the quantity. To solve these kind of situations you should know that the ratio of amount of increase (or decrease) of an amount to its original amount is equal to the ratio of percentage increase (or decrease) to ...

If you prefer glow sticks over candles during a power outage, then this how-to is for you! Although glow sticks are used as temporary light sources, there are other applications for them. Divers use them for night diving, fisherman use them to catch swordfish, and the military uses them for light markers, along with infrared versions used in conjunction with night vision devices. But with all these handy uses for glow sticks, the most popular is — recreational use, like dancing at raves, some...

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.

The first video introduces the basic electrical quantities of charge, current, voltage, and resistance. The concept of quantities and units is explained. The units of Coulombs, Volts, Amperes, and Ohms are described. The three basic formulas of Ohm's Law (E=IR, I=E/R and R=E/I) are also introduced.

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 724th installment in their series of digital spreadsheet magic tricks, you'll learn how to check if quantities are the same in two lists and show the differences if not, list the word "equal" if they are the same, and "not in list" if the lookup items is not in list using the MATCH, INSA, VLOOKUP and IF functions.

This educational math video describes the steps necessary to solve an equation involving absolute values. "Absolute value" refers to the magnitude of a quantity and is always expressed as a positive number. You can think of absolute value as the distance a number would be from zero if plotted on a number line. Positive 17 and negative 17 both have the same absolute value because both are 17 units from zero on a number line. Because of this, all absolute value problems have two answers, one wh...

When eating healthy, try this strategy to feeling fuller on fewer calories. This diet and health how-to video is part of Healthy Appetite with Ellie Krieger show hosted by Ellie Krieger. Cooking healthy food can be quick, easy, but most of all, delicious. Nutritionist and author Ellie Krieger has created fast and simple healthy recipes for the real world. She'll show you how simple it can be to stay on the healthy track no matter how busy and stressful your life is. Ellie also has strategies ...

This video loosely explains the method of how to make a blue colored slime from corn flour, blue food coloring, and a quantity of water which is undetermined. Quantities of ingredients to be added for this project vary and can be made up as the person goes along in combining the ingredients to produce the desired results. Ideally, the product should be of a slime like consistency, or can be described as 'gooey' in appearance. The resulting slime product should be easily stirred when it is sti...

In this video the instructor shows how to solve mixture problems using two variables. Usually in these kind of questions the problem statement goes like, if A costs $x for a pound and B costs $y for a pound, in what ratio should they be mixed such that one pound of the new mixture sells for $z a pound. So, in these kind of problems start with a box where you list down all the given data in the form of a table as shown in the video. Now denote the unknown quantity of A and B by two variables a...

Here we look at squaring expressions that involve radicals because people tend to make some common mistakes while solving such expressions. Take 5 times the square root of y quantity squared, the answer here is not 5y. Here's the reason, square means to multiply something with itself so the square of 5 root y would be 5 root y into 5 root y. So 5 x 5 is 25 and under root y into under root y equals just y so the answer will be 25y.

This video shows us the method to find the percent increase or decrease in a quantity. This can be done in 30 seconds. The formula states that the percentage increase or decrease is equal to the product of the ratio of amount (increase or decrease) and the original amount and 100. This is explained by two examples. In the first example the amount of increase of the price of groceries is found by taking the difference of the new price and the old price. This is divided by the original price an...

This video describes how to store large quantities of meat for a rather long period of time. To start, take the meat and season it if you like, then place it in a plastic bag. Roll the meat down flat and get all of the air out of the plastic bag and then seal it. Take a skewer and press down to create three (or more) lines in the meat to create a grid. Finally, freeze the meat and then when you need some of it just break off as much as you would like and put the rest back in the freezer. This...

Phosphors are great for lighting up areas where fire will not burn, and also for keeping humans alive in very small quantities. Quenching phosphors allows you to use them for all sorts of cool projects, and this video will show you how to make an IR detection device with quenched phosphors and also how to measure temperature with thermally quenched phosphors.

When soap making, soap molds save you a lot of time, allowing you to produce prettily shaped bathtime goodies in less time and in greater quantities. Designs (decals) can then be added on top of these soaps for a personalized effect.

In this episode you will learn how to discuss food you like and dislike and how to express quantities in the English language.

Chef Billy Parisi from Fix My Recipe responds to a request sent by one of his viewers, to "fix" a barbecue chicken skewers meal.

No pain, no gain, right? In this fitness video you'll learn how to do a standing rowing exercise with a little twist: adding dumbbells. By holding on to a substantial weight while doing a bent rowing exercise, you'll be adding a lot more resistance to your workout, forcing your triceps to work harder to contract.

Brazilian Jiu Jitsu black belt Octavio Couto Jr. is a real pro when it comes to fighting. He is going to be teaching you how to properly keep an opponent pinned down to the ground for a substantial amount of time. In this seminar, Octavio demonstrates a unique side control position known as the 100 kilo and a few other great moves to use in order to help you gain complete control over the person you are fighting. If you don't know what the 100 kilo is or how to do it, just follow this video a...

This week, Samsung officially kicked off the Oreo Beta Program for the Galaxy S8 and S8+ in North America and several other markets. The full list of changes is quite substantial, so we'll be running through them in a series of posts detailing what's new. First up, the Galaxy phones inherit notification channels from Android 8.0.

What's an LED Throwie? Watch this video and find out how to light up your neighborhood using colorful LED's and magnets! Yet another great idea for creating neighborhood art from Graffiti Research Lab.

Many women invest substantial time and money in acquiring and styling very feminine elaborate clothing to try and attract men. For most men, the women look even sexier wearing their blazer and collared shirt after a night's festivities. Watch this video to learn how to rock a man's blazer as part of several sexy, sophisticated, feminine looks.

Percent problems, also called as proportion problems, are simple problems where you deal with percentages. Given a percentage problem you may need to identify the percentage, the part or whole quantity from it. You can use the proportion or percent equation to do this. Proportion equations says that the ratio of part to the whole is equal to the ratio of percentage to one hundred. Percent equation says that the product of the percentage in the decimal form and the whole gives you the quantity...

MP3 CDs are a convenient, economical way of taking a substantial part of your music library with you on the road. In this tutorial, Gary Rosenzweig from MacMost.com looks at how to use iTunes to make an MP3 CD that will fit hundreds of songs on to a single CD and play back in most modern CD players.

If you're a home cook, peeling garlic is probably not your most favorite part of preparing a meal. Sure, the first one or two bulbs are a cinch, but once you start peeling garlic in larger quantities the inevitable stickiness arises and the garlic becomes harder and harder to disrobe.

Elaine Lemm demonstrates how to make the traditional British dish, yorkshire pudding. This video recipe goes through all the necessary steps for preparing yorkshire pudding.

If you're not just a chemistry nerd, but also a firearms freak and explosives nut, then this home brew chemistry concoction is just what you need for some cheap homemade potassium chlorate. It's a mixture of potassium, chlorine and oxygen (KClO3) and is used for such things as gun primers, propellents, and explosives (when mixed with the appropriate fuel). And guess what? NurdRage is going to show you the steps for this makeshift potassium chlorate.

Love Microsoft Excel? This clip contains a tip that just might induce you to. With this free video tutorial from ExcelIsFun, the 348th installment of his "YouTubers Love Excel" or YTLE series of free video MS Excel lessons, you'll learn how to build a formula that will take invoice information for inventory quantity sold and update inventory records to show correct amount on hand (in stock).

Hetal and Anuja from Show Me the Curry! take a step away from their usual Indian cuisine to show you how to make a delicious Mexican-style seven-layer dip. Choose the serving dish. For large parties a decorative bowl is suggested; otherwise, you can make individual servings in a margarita glass. For the first layer, spread refried beans in the bottom. Make this a thick layer as it is the most substantial part of the dip. The second layer is guacamole; spread this over the top of the refried b...

Vegetable puffs are a wonderful snack option for the days that you want something substantial and you can’t wait very long for it to be made! Watch this how to video to learn the recipe and the method of cooking vegetable and keema puffs.

In this video, viewers learn how to install Wiiflow. Viewers will need to install cIOS 249 and 222 / 223. Wiiflow is USB Loader that you can use on a Wii that have modified or hacked. Wiiflow enables you to play your "legal ISO backup" by using any USB storage device like a thumb drive or a more substantial external hard drive. This video demonstrates how to do this in a way that is easy to follow.

Stir frying doesn't just mean "toss whatever you have lying around into the pan and add oil." In fact, stir frying is a precise art that requires control of quantity of ingredients, the right shape of pan (a wok is preferred), and a non-stick pan in order to produce the perfect quality result.

Urban Decay has a nasty habit of releasing highly anticipated makeup palettes in very limited quantities so they sell like hotcakes. Their most recent palette, NAKED, sold out in seconds on their website, but if you were one of the lucky ones to snatch one of these up, then this tutorial will teach you how to create a smokin' hot look using the palette.

There are lots of techniques you can use to throw a pot and to sculpt and mold it, but when you get a big order for a batch of pots, the best technique you can use is the technique that will produce the largest quantity in the least amount of time.

If you're a beauty junkie, you probably go with the "no expense is to be spared" philosophy of purchasing cosmetics. Rather than pick quality or quantity, you go with both.

Hurricanes can occur any time with out any warning. So it is prudent to prepare you self for disaster recovery in case of any hurricane. To protect your self from hurricane by staying at home or to flee from a hurricane you will need some items ready. The main thing is water. So arrange for one gallon of fresh water for one person per day. It is good to store water sufficient for one week. So store enough quantity of water for all the persons in the home sufficient for one week. Make sure tha...

In this Autos, Motorcycles & Planes video tutorial you are going to learn how to clean your car windows so they are streak free. You will need ammonia solution and a mixing bottle. Mix one part ammonia with ten parts of water in the mixing bottle. Make sure you take sufficient quantity of ammonia. Then get a spray bottle and pour the solution into it. Get a piece of rag and a micro fiber towel. Spray the window liberally with the solution and wipe with the rag. Now wipe with the micro fiber t...