How To: Make This Amazing 9-Layer Density Tower from Things Found in Your Kitchen
Ralph Waldo Emerson once observed that "the seed of science" was "wonder," and taking a look at this nine-layer liquid tower from Steve Spangler's Sick Science! channel, one can't help but do just that — wonder. How is this possible? Is this magic or what?
How To: Build a Simple Paper Bridge as a Science Experiment
Every day we pass bridges, whether it's a foot bridge, a highway overpass, a span over water, or a viaduct over a valley. We pass on these structures without even thinking of the engineering genius that went into their design and construction, let alone the science behind their strength.
How To: Find a slope of a line parallel/perpendicular to it
This video tells you how to find a slope of a parallel / perpendicular to it. In the equation y = mx + c, m is the slope. To calculate the slope of a line that is parallel to another line, you have to consider the rule m1 = m2 which means slope of the first line m1 is equal to the second line m2, if both the lines are parallel. Take the equation y = 2/3x - 7.2/3 is the slope. According to the rule m1 = 2/3 and so m2 = 2/3.Now to calculate the slope of perpendicular line you have another rule ...
How To: Find the perimeter & area of a complex figure
In this video tutorial the author shows how to find the perimeter and area of a complex figure. He shows that a complex figure can be subdivided into standard geometric figures. In the current example he divides the complex figure into a rectangle and a triangle. Now he computes the perimeter by adding the three sides of the rectangle and the two sides of the triangle. Similarly he computes the individual areas of the rectangle and the triangle and finally adds then up to find the area of the...
How To: Make hydrochloric acid from sodium bisulfate and table salt
In this home-science tutorial from WonderHowTo favorite Nurdrage, you'll learn how to create hydrochloric acid using 140 grams of sodium bisulfate, a pH lowering compound available in most pool stores, and 60 grams of sodium chloride salt and an external heat source. Watch for a full demonstration of the process and complete, step-by-step instructions.
How To: Make boric acid from borax
This is a video tutorial in the Education category where you are going to learn how to make boric acid from borax. For this experiment you will need borax (disodium tetra borate) and conc. hydrochloric acid. Take 25 ml of hydrochloric acid and dilute it with 75 ml of water. Next take 6 - 7 gms of borax and dissolve it in boiling water. Now add equal amount of hydrochloric acid. Crystals of boric acid will start forming. They are completely insoluble in cold water. After about half an hour, fi...
Use the quadratic equation: finding the mirror point
In this video the tutor shows how to find the mirror point using a quadratic equation. He says that to graph a parabola you need to find the mirror point symmetrical to the Y-intercept. Now he explains how to find a mirror point using an example with sample values. He begins with saying that the Y-coordinate of the mirror point is same as the Y-coordinate of the Y-intercept. Now you have to find the x coordinate of the mirror point which he shows that it is double the x-coordinate of the vert...
How To: The Best Investigatory Projects in Science: 16 Fun & Easy Ideas to Kickstart Your Project
Most of us have conducted an investigatory science project without even knowing it, or at least without knowing that's what it was called. Most science experiments performed, from elementary to high school students and all the way up to professional scientists, are investigatory projects.
How To: Make a Crazy Foam Explosion Science Experiment
Check out this video to see our Fantastic Foamy Fountain in action. The experiment uses Hydrogen peroxide and dry yeast. Hydrogen peroxide is similar to water but has an extra oxygen atom. This makes it more dangerous, and only adults should handle the hydrogen peroxide.
How To: Write an argumentative research essay
Writing a research essay or an argumentative research essay can seem like a major challenge to students. All the work, all the writing all the deadlines! Simplify the entire process by learning how to gather information the correct way, namely using the resources at the school library and, more importantly, how to fill those pages. This video will show the easy way to write argumentative research essays.
How To: Use ">" (greater than) and "<" (less than) symbols
In this video the author explains how to identify the less than (<) and greater than (>) symbols and when to use them. She explains to us to relate the numbers to animals stating that the smaller numbers are smaller animals and bigger numbers are bigger animals. Now she tells us to imagine that smaller animals are eaten up by the larger animals. So she shows a smaller number comes on the left side of '<' sign and bigger number comes on the right side of '<' sign stating that the bigger number...
How To: Use and find x & y-intercepts in algebra
A straight line can be represented in the form of a liner equation containing two variables x and y. When the equation is graphed on a pair of coordinate axes, the line passes cut through the axes in two points. The point where the line cuts the x-axes is called as its x coordinate and the point where the line cuts the y-axes is called as its y coordinate. In this way a line has x-intercept and y-intercept. The x-intercept of a line lies on x axes and is in the form (a,0). Similarly the y-int...
How To: Make a never ending foam snake
In this video the author shows how to make a never ending foam snake. He starts by speaking about how hydrogen peroxide can be fun. He starts with the requirements first which are a dish soap, a bottle of hydrogen peroxide, some dry yeast, and a red fruit color. Now he fills up a cup with hydrogen peroxide, adds the color and two table spoons of dish soap. Now he shows how to use yeast which is used to remove the oxygen from the hydrogen peroxide. And finally he demonstrates the never ending ...
How To: Weather Forecast And Weather Predict Without Technology
We have no control on the weather yet it is a part of our lives which influence what we do, what we eat, what we wear and many times where we live. How did people predict the weather before there was the Internet, television, radio or the weatherperson with all of their gadgets?
How To: Make Soap Out of Guava Leaf Extract for a Science Investigatory Project
Unless you're a high-schooler building a nuclear fusion reactor, the hardest part of a science investigatory project often is coming up with a good idea. You want it to be cool yet feasible, novel but still useful.
How To: Make a Paper Plate Speaker That Actually Works for Under $1
Back in 2007, YouTube user HouseholdHacker posted a parody video on how to make a high-def speaker for under a buck. MythBusters took on the challenge and busted it.
How To: Make a Monster Dry Ice Bubble
Sure it's been done before, but it never gets old. There's something magical about dry ice, bubbles, and especially the result you see when they're combined!
Classic Chemistry: Colorize Colorless Liquids with "Black" Magic, AKA the Iodine Clock Reaction
Want to make boring old colorless water brighten up on command? Well, you can control the color of water with this little magic trick. Actually, it's not really magic, but a classic science experiment known commonly as the iodine clock reaction, which uses the reactions between water and chemicals to instantly colorize water, seemingly by command. You can use different colorless chemicals to produce different colors, and you can even make the color vanish to make the water clear again.
How To: Multiply & Divide Numbers (Basic Elementary Math)
Adding and subtracting may be the easiest of mathematical operations, but once you get it down, multiplication and division can be just as easy. That's why it's called elementary arithmetic. If it were harder, it would be called college algebra or trigonometry. But it's not— it's basic math, and once you get your head around the numbers, you'll never hate math class again! (Okay, maybe you will.)
How To: Subtract a mixed number from a proper fraction in basic math
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. With this free math tutorial, you'll learn how to subtract a mixed number from a fraction in basic arithmetic.
How To: Find and sketch the domain of a multivariable function
Looking for a primer on how to find and sketch the domain of a function z = f(x, y) in calculus? Learn how with this free video calc lesson. 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).
How To: Find the slope of a line given 2 points with fractions
In this video tutorial the instructor shows how to find the slope of a line given two points with fractional values. To do this first name your two points as point 1 with coordinates as x1, y1 and point 2 with coordinates x2, y2. Then substitute the values in the equation of the slope which is slope m = (y2 - y1) / (x2 - x1). Now all you have to do is simply the fraction after substituting the point values. Be careful about the signs while substituting in the formula. Now finally after solvin...
How To: Find the standard deviation with the Z-Score formula
In this tutorial, we learn how to find the standard deviation with the Z-Score formula. First, take your problem and write it out one by one underneath each other. Then, you will need to substitute the numbers in for the variables that are in the problem. Once you do this, you will follow the basic rules of math to find out what the answer to the problem is appropriately. Once you have done this, finish off the problem to find the answer, then you will have found the standard deviation using ...
How To: How Do You Balance 14 Nails on a Single Nailhead? Find Out with This DIY Gravity Puzzle
This little brain game is all about engineering a lower center of gravity. The idea has been around forever, but most people still don't know how to do it. Trying to stack nails above the balance point will raise the CG and make the structure unstable. Here's how you can lower the CG to make a very stable structure and impress your friends.
How To: DIY Ninja Turtle Ooze! Make Your Own Radioactive Canister of Glowing Green Slime at Home
There's a broken canister of mutant ooze leaking down into the sewers! But don't worry because this sticky slime is non-toxic, and it's so easy to make, a three-year-old can do it!
News: DIY Toys Made From Trash + 100's More Easy Tricks & Experiments
Arvind Gupta is an Indian educator and inventor who makes whimsical, elegant toys from simple and inexpensive materials. His site has hundreds of free project tutorials, with simply outlined instructions in the categories of science, math, astronomy and more. Below, peruse the video gallery and images for a selection of Gupta's inspiring work.
How To: Find standard deviation
In this video tutorial, viewers learn how to calculate the standard deviation of a data set. The standard deviation of a statistical population, a data set, or a probability distribution is the square root of its variance. To calculate the standard deviation, users will need to follow these steps. 1) Find the mean of the data. 2) Subtract the mean from each data point. 3) Square each of the values you got in step 2. 4) Then find the mean of the values you get from step 3. 5) Finally, square r...
How To: Find the percentage of a number easily
In this arithmetic basics tutorial the author shows how to find the percentage of a number. He says that hundred percentage of number is the same number. He says that if we find the percentage of a number where the percentage is less that 100, then the value of the number reduces. Similarly if we find the percentage of a number where the percentage is more than 100, then the value will be more than the original number. He says that to find the percentage of a number we need to mark a decimal ...
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: Make DIY Nitrogen Triiodide from ammonia & water purification iodine crystals
Nitrogen Triiodide is a very powerful contact explosive, but like most fun chemicals is not readily available to the general public cheaply. If you want some and have some chemistry skills, watch this video to learn how to make Nitrogen Triiodide at home out of household ammonia and water purification iodine crystals.
How To: Make fake blood from iron, chloride, and potassium
In order to make fake blood, for special effects or for Halloween, you will need the following: Potassium Thiocyanate (KSCN), Iron (III) Chloride (FeCL3), which is also known as ferric chloride or may substitute Iron Nitrate (Ferric Nitrate). You will also need water or dihydrogen monoxide.
How To: Extract DNA from a Strawberry with Basic Kitchen Items
We all know that DNA is pretty amazing, but it's not something that most of us get much hands-on experience with. Even though it's in every living thing around us, we never see it, so we rarely think about it either.
How To: Determine volume measurement
In this how to video you will learn how to measure the volume of solids and liquids. The formula for determining volume is width x length x height.
How To: Calculate Faster Than a Calculator
When you need to crunch numbers quickly — and I mean really quickly — there's a cool method you can use to multiply two numbers together in just a few seconds.
How To: Write a sum/difference of logarithms as a logarithm
To write the sum or difference of logarithms as a single logarithm, you will need to learn a few rules. The rules are ln AB = ln A + ln B. This is the addition rule. The multiplication rule of logarithm states that ln A/b = ln A - ln B. The third rule of logarithms that deals with exponents states that ln (M power r) = r * ln M. Using these three rules you can simplify any expression that involves logarithms to arrive at a single logarithm. The instructor shows how to apply these rules to a f...
How To: Simplify a quadratic formula result
In this video the tutor shows how to simplify a quadratic formula result. You can solve a quadratic equation using the quadratic formula. The first thing you have to do when given the quadratic equation is bring all the terms to one side so that you have a zero on the other side of the equals to sign. Now the formula to calculate the roots of the quadratic equation ax*x + bx + c = 0 is x = (-b + root of(b*b - 4*a*c) ) / 2 * a. The other root can be obtained by using the minus sign before the ...
How To: Write a slope-intercept equation given an X-Y table
In this tutorial the author shows how to derive a slope-intercept equation of a line given an X-Y table. He explains that the general form of slope intercept form which is y = m*x + b. Now he intends to find value of slope, i.e. m first. Now slope is change in y over change in x. He computes the slope using the X-Y values from the table. Next he substitutes a pair of x, y value in the equation to compute the value of y intercept b. Now finally substituting the values in the equation the slop-...
How To: Use a Peltier module to create free electricity from heat
A Peltier module allows you to turn heat into electricity. Because you can place it in areas that are normally warm anyway, the electricity created is "free" in a sense, though it does work best when one side of the module is cold and the other is hot. In other words, all you'll need for this project is the Peltier module and a cooler surface such as soil or water, and a warm area such as a well lit window or warm pan.
How To: Make Black Snake Fireworks With & Without Fire
In this video, I'll be showing you how classic black snakes work and how to make them at home. There are actually two methods covered in the video — one that uses fire and one that does not. So just choose the one that fits best for your situation.
How To: Evaluate factorials with a TI-83 calculator
The factorial of a number n can be defined as the product of all positive integers that are greater than 0 but less than or equal to n.
Next Page
Prev Page