Education: Page 28

PatrickJMT takes you through step by step on the basics of how to use curve sketching to solve calculus equations. Steps that are covered in this two part video include domain, intercepts, symmetry, horizontal and vertical asymtotes, intervals of increase/decrease, local maximums and minimums, concavity and points of inflection, and finally the sketch. A rational function is looked at as an example. The problem is to graph y equals (x - 1) divided by x to the power of 2. This video clip covers...

Making a blue glowing substance is easy, as long as you already know the secret to making green luminescent phosphorescent glow powder. By watching the green glow-in-the-dark procedure, you know that you will need strontium nitrate, aluminum nitrate, europium and dysprosium nitrates, and nitric acid. That will make a green glow, but if you want to make a blue version, it's a relatively easy fix...

Exponential functions are functions which contains terms which are integers raised to the power of variables. Note that the variables are not raised to the power of integers, but the integers are raised to the power of variables. Variables raised to the power of integers are called as polynomials and are a different class of functions. But exponential functions grow very fast than polynomials with the increase in the value of the variable. To understand the growth of these functions take a...

This video shows the method to find the volume of a cube, cylinder, pyramid or cone. Volume is equal to the multiple of the area of the base and the height or V=(base area)(height). Starting with the cube, the volume= [(side)(side)](side) or side cube or side^3. In the video side=50m or V=125000 cubic centimeter. Volume of the cylinder= [(pi){(radius of base)^2}](height of cylinder) or V=(pi)(r^2)(h). Substituting the values, V=pi(2^2)(4) cubic inches or 16pi cubic inches. Volume of a pyramid =...

This is a how-to video about measuring the toilet flush volume. This is a handy method to find out how much water is used for flushing your toilet. Here is the step by step technique to measure the water capacity of your toilet.

In this how to video, you will learn how to build your very own rain gauge. You will need tape, scissors, rain gauge ruler, and a jar. First, go to the website shown and print and cut out the ruler on the screen. Next, cut the tape strips. You will need them to be about 5 inches in length. Next, attach the rain gauge ruler to the jar. You will do this by placing the ruler on the tape and place the ruler on the jar. Make sure the ruler is aligned with the bottom edge of the jar. Take the...

"Mean" is really the average on a set of numbers. The video uses the temperatures on a weather report as an example of a data set. Start by adding the temperature numbers of the week up. After you have the total, divide that number by 7, because you used 7 numbers in your data set. The answer that you get after dividing will have a few decimal places at the end of it. You can round the answer to the nearest whole number because all the numbers from your original data set do not have any...

In this how-to video, you will learn how to make potassium trichromate. You will need potassium chromate and dichromate. It is easy to go between the two. You can add a base to the dichromate to make the chromate. It will go from orange to yellow. The trichromate can be produced. You will need nitric acid, potassium dichromate, and sodium disulphate. First, make a solution of sodium sulphate. Take a long test tube and the potassium dichromate to it. Add double the volume of...

Learn how to add rational, or fractional, numbers by following the tutorial in this video. In the case of fractions where the denominators are the same, the addition is simple: you simply add the numerators and keep the denominator the same. When the denominators are not the same, you need to find the least common denominator (or multiple). Take a look at your denominators and test different numbers to find the smallest multiple of the two. Then, convert the two original fractions so that their...

This video tells us the method to find the surface area of an aluminium can or cylinder. The surface area includes the outside area of the curved portion and the aluminium top and bottom. The formula to find area is the multiple of 2, pi, r, r+h or (2)(pi)(r)(r+h). The radius of the cylinder is the radius of the circular top or bottom. In the example shown in the video, the radius is 4 inches and the height is 12 inches. Substituting the values in the formula, we get the surface area as...

Here we will demonstrate how to measure the volume of a balloon. A balloon is not a straight edged polygon shape, usually, so the mathematical equations get that much harder, on the flip side, it may be a spherical or ovalish shape, but measurements with math alone are detrimental due to the uneven sizes of the balloon. Here is how to do it properly. You will need a bucket, preferably, to hold water, a larger container than your original bucket, and a measuring container. Place the bucket...

Motion can be studied in different dimensions. Study of motion of a body in a straight line is called motion in one dimension. A falling body can be called as motion in one dimension. Things can also move sideways when they fall at the same time. This is also called as projectile motion and it is a study of motion in two dimensions. When studying projectile motion we can neglect one dimension of the motion and study the other dimension obtaining the results of motion in that dimension. If a...

Khanacademy tackles problems involving multiplicative inverse (i.e. taking the number one and dividing it by that number) and dividing rational numbers in its simplest form (lowest common form).

A pyramid is a three dimensional figure with the base in the form of a triangle and three slant sides to it. To find the surface area of a pyramid you have to find the area of the different pieces that make it up. The pyramid base can be triangle or even other geometric figure like pentagon. So first draw the base of the pyramid separately and compute its area first. Now compute the area of each sides separately. The area of each side can be same if the pyramid is a regular pyramid. Some times...

In chemistry you come across problems which ask you to find the percent by mass and percent composition of each element in a chemical compound. To do this the first step is to compute the molar mass. Use the periodic table to look up the mass of individual atoms and multiply it by the number of atoms to find the mass of that element. Now add up all the masses to arrive at the molar mass of the compound. Now to find the percent composition of an element divide the total mass of each element by...

In this how to video, you will learn how to find the North Star in the northern hemisphere. To do this, you must know how to locate the Big Dipper and the Little Dipper. The Big Dipper is one of the brightest constellations in the sky. You can use this constellation to find the location of the north star. The two stars at the cup of the Big Dipper will point towards Polaris, also known as the North Star. The North Star is the end of the handle of the Little Dipper. This will be helpful if...

Rational numbers are numbers that can be expressed in the form of a/b, where a, b are integers and b is not equal to zero. Rational numbers are also called as fractions. Multiplication of fractions is very simple and straight forward. Two multiply two fractions a/b, c/d first multiply both the numerators to arrive at the new numerator. Next multiply both the denominators to arrive at the new denominator. Now the new fraction can be further simplified to arrive at the solution. Note that you...

Eddy Currents are little circles of electricity created when metals are moved by magnets or even when magnets are moved by metals. To understand this practically take a regular piece of cardboard and drop it in between a horse shoe magnet. It drops normally with out being effected by the magnet. This is because the cardboard does not conduct electricity. Therefore it does not cause any eddy currents. But instead if you use an aluminum piece in the same way, it falls very slowly, because...

Khanacademy teaches us how to handle simple inequalities (less than or more than). In an equation, we usually have one solution. In problems involving inequalities, there is a whole set of answers. For instance, x minus five is less than 35. The answer for x is a whole series of numbers that when five is taken away from it, is less than 35. This equation is handled like any other equation involving an equal sign. We add five on both sides of the equation and the answer for x is any number that...

This is a great instructional video on how to find oblique asymptotes of rational functions. Let us take the example f(x)= x square+4x-12 over x-6. Now we have to find the horizontal or oblique asymptotes of this rational function. The higher power here is x square which is at the top and hence we have to find oblique asymptotes of this function.When we divide x square+4x-12 by x-6 we get x=10 and the reminder is 48. Now you can easily write down the final answer. The oblique asymptote for the...

The first problem that is show is exponential decay. First you will need to create a table with hours and substance left. The next step is to find the trend by noting that we are left with a certain percentage of the substance. One you have the trend you will use this to calculate the amount of substance left in said hours, in this case 6 hours. The following example shows you how to solve exponential growth. It is essentially the same except for the fact that you will be increasing, so instead...

This video is about changing fractions to decimals. The teacher uses 1/2 and 1/3 as his examples.

Making a Elephant Toothpaste Volcano!

In this Education video tutorial you will learn how to make ice cream and explore the ingredient salt. Ingredients are a cup of milk, sugar, vanilla, some salt, ice and two plastic bags. Add two tablespoons of sugar to one cup of milk, a quarter teaspoon of vanilla, stir it up and pour it in to a plastic bag. Put this bag in another bigger plastic bag, add some ice and about half a cup of salt. Seal the bag and start mashing it. After about 10 minutes, it will turn into ice cream. When salt is...

Purple cabbage is a natural indicator and this video teaches you how to easily prepare purple cabbage in the comfort of your own home to be used as an acid and base indicator. Take one leaf of your purple cabbage, tear it into smaller pieces and place all the pieces into a beaker or bowl of boiling water for an hour. Collect the liquid from your mixture into a bottle. You’ll notice that the liquid is now dark blue or purple at which point is neutral. It is ready to be used as an indicator....

Do you know your constitutional rights if stopped by the police? Washington Post recently ran an interesting article on "10 Rules", a docudrama produced by the D.C. nonprofit Flex Your Rights.

In this how-to video, you will learn how to stack liquids at home. This will make for a great experiment. You will need a tall, transparent container, molasses or honey, liquid soap, water, vegetable oil, and rubbing alcohol. You might want food coloring and items to float in the container. First, add the molasses to the container. Next, add the dish soap and water. You can add food coloring to this. Make sure to pour it on the side of the container. Add the vegetable oil on top of the...

In this video tutorial, viewers learn how to make an erupting volcano with soap. Begin by adding some vinegar into a flask/baker. Then add some soap into the vinegar and stir it by shaking the flask/baker. Users may choose to add some food coloring to make the mix look more like lava. In a separate, add some water and baking soda. Then stir it to mix. Pour the baking soda solution into the soap and vinegar mixture. This video will benefit those viewers who are interested in science and...

When you are given a point through which a line passes and the slope of that line, you can calculate the equation of that line. The general equation to solve this kind of equations is called as point-slope form. The point slope of a line passing through (a, b) with slope of m is (y - b) = m * (x - a). Now substituting the values in the above equation you can obtain the equation of the line in terms of x and y. In case you are given with two points first find the slope of the line which is the...

How much air is actually inside a packing peanut? There is a simple experiment to conduct to see what is leftover. To begin, pour 200 ml of acetone into a glass container and add approximately 1800 ml of packing peanuts. Stir with a wooden spoon to dissolve. The video's author starts with the 1800 ml and realizes that that isn't enough. He then keeps adding until he has added an entire large bucket to the original 200 ml of acetone. After all are dissolved, all that is left in the glass...

In this video tutorial, viewers learn how to find an angle using alternate interior angles. Make sure that the angles are alternate interior angles. Alternate interior angles are angles that are on the inside of the parallel lines, and on the opposite side of the transverse. The transverse is the line that passe through the two parallel lines. If both angles are inside the line and are opposite to the transverse, then they are alternated interior angles. If you know two angles are alternate...

In this video tutorial, viewers learn how to do a sodium and water experiment. Sodium is a silver metal that is very reactive. When exposed oxygen in the air, an outer coding of sodium oxide will form. Simply drop a piece of sodium into a cup of water. When dropped in water, sodium reacts to form sodium hydroxide and hydrogen gas. The sodium will constant move around in the water. Sometimes the heated reaction will cause the nitrogen gas to ignite. Under the right condition, it may even cause...

Chemistry can be very fun when you create different kinds of reactions between elements. Note that caution should be employed to not harm yourself while performing these reactions. Ammonium Tricynate reacts with barium hydroxide octahydrate in endothermic form. Endothermic reactions are those which absorb heat from the surroundings during the reactions as opposed to exothermic reactions which produce a lot of heat during the reaction. When endothermic reaction occurs, depending up on the...

Decimal numbers are numbers which contain a integral part before a point and a decimal part after the point. The first step in solving decimal arithmetic is being able to understand decimal numbers. Reading a decimal number is similar to reading a whole number except for a few minor differences. In a normal number the right most digit is ones place and the place next to it is tens place and so on the value of the position increases as you move left. But a decimal number starts from a tenths...

Need help reducing radical expressions without perfect square or cube roots? Take heart: this free math lesson will ensure that you know everything you need to know for that next big test. Examples include square roots, cube roots, and 4th roots. You'll also learn a technique to simplify n-root expressions as well as how to simplify variables in radical expressions.

If you have a circular or semicircular protractor like the one used in this video, making a pie chart is as easy as – well — pie. This will teach you how to use your protractor to measure out each individual slice in your pie chart. Learn how to visualize statistical data through hand-drawn pie charts with this free video math lesson.

The video starts with the presenter explaining that he will be talking about harmonic oscillators, not the harmony of anything in sound, but something that moves back and forth in roughly the same speed back and forth.

If you believe there is a person out there who is threatening your life or has even made a threat against you already, you might want to file a restraining order against that person. This video will teach you the criteria you need for a restraining order and how to go about getting one.

For certain equations, you will need to convert decimal numbers into fractions. If this is the case, there are a few quick steps you will need to take to do so.So, if you can't remember how to do this conversion or are just learning, this tutorial is here to help you.In this video, you will receive instruction from a professional teacher who is here to help you get on track.So, have a glance at this quick tutorial and you will be on your way to a better understanding of partial numbers soon...

Percents are handy for displaying statistics or labeling objects such as sale items in a store, or ingredient labels. However, in a math equation, a percent is a bit difficult to use. Therefore, you will need to convert your percents into an easier type of number form.In this particular tutorial, learn how to convert percents into fractions in your math class.This process is not super difficult and this video will show present you with step by step instructions to help you master it in no...