Hot Education Posts
How To: Follow three rules to balance chemical equations
In this video, we learn how to follow three rules to balance chemical equations. The first rule is that you need to start by balancing elements that appear in only one reactant and one product. The second rule is that you need to multiply through by common factors. You must retain equal numbers of atoms of each element on both sides of the equation. The third rule is: if an atom appear in elemental form on one side of the equation, save it for last. Going over the rules of how the balance the...
How To: Balance chemical equations
n this tutorial, we learn how to balance chemical equations. This is a straight-forward concept to balance out both sides of the equation of chemicals. To start, you will need to analyze how many atoms in each chemical you have on each side. Once you do this, you will need to find what you can multiply by on each side to make them equal to the other side. Once you do this and have equal atoms on each side, then the equation will be equal. Remember that you cant have a half of an atom, so that...
How To: Increase or decrease by a percentage
In this video, we learn how to increase or decrease by a percentage. First, to increase you will need to find what the percent of the number is. To do this, you will find 10%, which should be very easy. As soon as you've found this, you can add or subtract to find the percent you need. Then, add this onto the original number and you'll know the percentage. To decrease the percentage, you will do the same type of equation. Except, you will need to subtract as you go to finish the problem. When...
How To: Understand chemical change in chemistry
In this video we learn how to understand chemical change in Chemistry. When you start out, you must first figure out what your cathode and anode is in the equation. Then, read it out to find out if it's oxidized. Once you have this figured out, you can find the conditions of temperature you need to maintain the chemicals. You can figure this out b doing a basic equation for all of the chemicals. Fill this in with the correct information, then the answer will be done. Make sure you understand ...
How To: Balance an easy chemical equation
In this video, we learn how to balance an easy chemical equation. You can do your equation by testing it out with the actual chemicals. Watch and see what the reaction is as they start to mix together. To balance this reaction out, you will need to analyze the number of atoms that each element has on both sides of the equation. For it to be balanced, you must have the same number of products and reactants in the equation. You cannot create or destroy matter, you can only change its form, so r...
How To: Evaluate functions by substituting in the variable to the input given
In this video, we learn how to evaluate functions. When evaluating functions, you substitute in the variable to the input given. Once you do this, you will rewrite the equation filing in the appropriate spots with the numbers that you are given. After this, you will evaluate the equation with the proper steps in math. Once you have figured out the problem, you can do this in reverse to make sure you have the correct answer. This is a very easy process and it doesn't take that long. Just make ...
How To: Rationalize a denominator that contains a surd
In this video, we learn how to rationalize a denominator that contains a surd. First, you need to rationalize the denominator by removing any square root sign. To do this, you will multiply the fraction but the flip of the denominator over itself, with the square root. Then, you will multiply the top by the bottom with the square root and this will remove it from the equation once you do the math to multiply it out. Once you're done, the number will be rationalized and you will have the answe...
How To: Calculate compound interest in math
In this video, we learn how to calculate compound interest. Start with your example of investing $2000 at 3% interest over four years. Now, write down how much you have at the start of year one. To find the percent of this you will need to simply do the amount divided by one hundred and times it by three. Then, you will find the number for the amount of interest you had for that year. Continue to do this for each year and the amount of money you will increase each year. Do this until you reac...
How To: Understand organic molecules in chemistry
In this video, we learn how to understand organic molecules in Chemistry. First, you will need to take a look at the chemicals that are inside of each of the different molecules. See how the molecules are made out and then see what number of different acids are inside of them. Once you learn this, you can see what the difference between this and other molecules are. This can all help you understand the beginning and end of what's inside of the molecules. If you aren't good at chemistry, you w...
News: What Happens When You Smash the Essence of Dynamite With a Hammer?
Nitroglycerin, otherwise known as the explosive essence of dynamite, is so sensitive AND powerfully explosive that when hit with a hammer, it creates "a supersonic shockwave and a flash of light almost too fast to film, even with the latest specialist cameras". In the blink of an eye (literally) extreme detonation occurs. Shooting super slo-mo is absolutely necessary (600x slower, to be exact).
How To: Create a strong antagonist when writing your first novel
In this video tutorial from published author Donna Sozio, we learn how to create a compelling antagonist when writing a novel. For all of the details, and to learn more about incorporating quality antagonists into your own written works, watch this writer's guide.
How To: Make use of foreshadowing when writing a novel
In this video tutorial from published author Donna Sozio, we learn how to foreshadow events when writing a novel. For all of the details, and to learn more about incorporating foreshadowing into your own written works, watch this writer's guide.
How To: Add conflict to a story when writing a novel
In this video tutorial from published author Donna Sozio, we learn how to create conflict when writing a novel. For all of the details, and to learn more about incorporating conflict into your own written works, watch this writer's guide.
News: World's Biggest, Most Badass Laser Aims to Create a Miniature Star on Earth
Introducing the National Ignition Facility. Not only is the name curiously amazing (a facility designated for the act of … combustion?), but it also happens to house the largest, most high energy laser in the world. Why would they create such a thing? To create a miniature star on Earth, with the goal to achieve fusion (re: an unlimited supply of free energy).
How To: Calculate the volume of a cube in basic geometry
With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of any cube.
How To: Calculate the volume of a triangular solid or triangular prism
With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of a triangular prism.
How To: Calculate the volume of a rectangular solid
With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of a rectangular solid.
How To: Calculate the surface area of a triangular solid in geometry
With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of a prism.
How To: Calculate the surface area of a rectangular solid in basic geometry
With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the surface area of a rectangular solid.
How To: Practice balancing chemical equations
In this video, we learn how to practice balancing chemical equations. First, take a look at the first and second part of the equation. Write out how many atoms each of the elements has in it. Compare each of the sides to see what the difference is between them. Then, find the multiple of each of the elements until they are equal to each other. After you find this, continue to do this for all of the different elements in the equation. This will give you a balanced chemical equation when you ar...
How To: Balance chemical equations with ease
In this video, we learn how to balance chemical equations with ease. First, you will need to take down the equation and find out how it is formed and how much each of the chemicals are in it. Draw a diagram if you need to so you have a visual key. If you figure out how many of each of the chemicals are in the equation, then you will know how to balance it out. You will make sure that both the right and left have the same number of chemicals and mass. Balance this out by adding in more chemica...
How To: Balance chemical equations the right way
In this tutorial, we learn how to balance chemical equations. The first thing you want to do is to draw a graph and label one side reactants and the other side products. Go through each of the atoms that are in your equation on both sides. Write out how many atoms are in each chemical. Then, find a common multiple that will give you and equal amount on each side of the equation. Continue to do this same for all the chemicals in your equation, then when you are finished write it out. Now you w...
How To: Read a schoolbox ruler
In this tutorial, we learn how to read a school box ruler. A ruler will be divided into inches, each inch will be divided in half. From there, it will be in quarters, then eighths, then sixteenths. Once you understand how the inches get divided up into halves, you will be able to read the ruler better. Start off by counting the small lines that you see on the ruler to get an idea of where the eight, quarter, and half inches are located at. After practicing this, you will be able to read a rul...
How To: Know the ruler
In this tutorial, we learn how to know the ruler. An inch ruler will have 12 inches on it. Each mark will be right next to these. Half of these marks will be a half an inch and the half of those with be an eighth. Half of this will be a sixteenth. On the other side of the ruler, you will see the metric system of the ruler, which is not used in the United States. It has centimeters listed on it instead of inches. To use the ruler, you will need to look at the mark it is on, then count the smal...
How To: Calculate standard deviation with graphing calculator
This video tutorial is in the Education category which will show you how to calculate standard deviation with TI graphing calculator. First you got to enter the data in to the calculator. Go to stat and click on enter. This will edit a list. Now you type in these numbers: 50, 20, 33, 40 and 55. Then press stat and click on enter. This will bring up the 1-var stats page. Press the "2nd" button and L1, because all our data is in L1. Click on enter and you will get all the data that you will nee...
How To: Find the determinant & area of a parallelogram
In this video, we learn how to find the determinant & area of a parallelogram. The determinant of a 2x2 matrix is equal to the area of the parallelogram defined by the column vectors of the matrix. Graph both of the equations that you are given on the vertical and horizontal axis. After you have all of the coordinates in place, you will be able to plug in the correct numbers to figure out what the answer to the equation in. This is more advanced math, so if you have not done it before, you sh...
How To: Find the area of a circle
In this tutorial, we learn how to find the area of a circle. The line from the middle to the edge of the circle is called the radius. Find what this is in your equation, then multiply (3.14 X radius x radius). This will always work out the area of a circle for you. So, do this equation with your calculator or by hand, then you will have the correct answer for the area. Make sure to add the units squared after you get the answer. If you are given the diameter (line all the way across), you wou...
How To: Perform knee replacement surgery
In this video we learn how to perform knee replacement surgery. The knee joint is accessed with an incision. Then, a number of different surgical tools will be used to perform the procedure. The part of the knee joint is removed first with surgical saws. Then, the artificial joint is put back into the area. Once this part is secured with screws, an insert will be joined in with it to keep it in place. The artificial joint is checked for the last time, then sutures are used to closed the joint...
How To: Write a personal statement to finish your application
In this video we learn how to write a personal statement to finish your application. This should not be a listing of all your qualities, it should be a story. This should have a lot of information about yourself to show how great you are. Write about anything that makes you different and focus on a strength you have. Think about everything you do outside of the classroom and be honest, because these people don't know you. Write with your heart and don't brag about yourself. Think about your a...
News: Evil Mad Science Produces Frankenstein RatCar, Rat-Robot Hybrid
Relax PETA, it's not as evil as it looks (although those neural electrode implants do look painful).
How To: Make a wheel spin with angular momentum & inertia
In this video, we learn how to make a wheel spin with angular momentum & inertia. You will need: a bicycle wheel, a lighter, and a couple of strings attached to the top of a deck. Now, take the bicycle wheel and hang it on the strings on both sides of the wheel. When you turn the wheel it will fall off of the strings. Start the wheel spinning again, then light one of the strings on fire. When you do this, the string will fall off but the wheel will keep on spinning while rotating. Do this exp...
How To: Divide and give an answer as a fraction
In this video we learn how to divide and give an answer as a fraction. If you are starting out with a simple fraction, you will simply take the number before the divide sign on the top and the second number on the bottom. If you end up with a number that is able to be simplified, make sure you take it down to it's most simple version possible. You can end up with a top heavy fraction, which means there will be whole numbers involved. Do the division to figure out how many times the bottom num...
How To: Multiply mixed numbers together
In this video we learn how to multiply mixed numbers together. First, take your mixed numbers and write them into an equation. Next, convert the numbers both to top heavy fractions. Now, multiply the top numerators together and then the denominators together. If you can't work out the numbers in your head use a method by writing it out in a table. As soon as you finish and end up with a final fraction, you need to simplify this. Find how many of each number goes into the larger one and then t...
How To: Subtract basic fractions in simple mathematics
This video tutorial is in the Education category which will show you how to subtract basic fractions in simple mathematics. You can do basic subtraction of fractions if the denominators are the same. If they are not, then find the lowest common multiple of the denominators and convert the denominators to their lowest common multiple. For example, to subtract 1/2 from 3/4 find the common multiple of 2 and 4, which is 4. So, the problem 3/4 - 1/2 can now be written as 3/4 - 2/4. Since, the deno...
How To: Balance chemical equations properly
In this video, we learn how to easily balance chemical equations. There are two sides of a chemical equation, both must be equal to get the proper reaction. To balance these out, first write out the number of atoms that is on each element on each side of the equation. After this, you will need to find the multiple between the matching elements. Once you find this, you will be able to balance out the equation for each of the elements. When you do this, you will have the same mass and atoms on ...
How To: Make sodium bromate & potassium meta-periodate
This video tutorial is in the Education category which will show you how to make sodium bromate and potassium meta-periodate. This experiment uses toxic chemicals and releases harmful gases. First you have to make a saturated sodium bromide. To this solution then add a small amount of potassium dichromate. The solution now becomes concentrated. Then make the circuit as shown in the video. You need a 3 - 5 ohm resistor in order to reduce the current. Then let the cell run for around 6 hours. S...
How To: Add mixed numbers
A mixed number is just another way of expressing a fractional number. This video shows two methods by which two mixed numbers may be added.
How To: Balance chemical equations using a teacher's guide
In this video we learn how to balance chemical equations using a teacher's guide. A chemical equation is a brief way of summarizing what happens inside of a chemical reaction. When you mix up two different chemicals, they will create new types of chemicals in the equation. You have to take these new chemicals into equation when you are trying to balance it out. The mass on both sides must be the same as well as the number of different chemicals on each side of the equation. Try out practice e...
How To: Convert top heavy fractions to mixed numbers
This is a video tutorial in the Education category where you are going to learn how to convert top heavy fractions to mixed numbers. Top heavy fractions are fractions with numerators greater than denominators. Mixed numbers are combination of whole numbers and fractions. To convert 12/5, find out how many 5s are in 12. The answer is 2 and after you remove two 5s from 12, you are left with 2. So, 12/5 is equal to 2 2/5. Similarly, in 10/3, you have three 3s in 10 and you are left with 1. So, 1...
How To: Describe chemical formulas
This is a video tutorial in the Education category where you are going to learn how to describe chemical formulas. A chemical formula represents the actual number of atoms of each element within a molecule. Different visual representations of molecules include the ball and stick three dimensional model, a line drawing that represents the structure in two dimensional terms, and a shorthand used by organic chemists. If a molecule has 4 green atoms and 2 orange atoms, the ratio of green to orang...