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-...
In this tutorial, the instructor shows how to compute the surface area of a regular pyramid. A regular pyramid has four equal sides which are in triangle form, and the base in square form. Its surface area is four times the area of its side plus the area of its base. He goes on and takes an example with sample values and demonstrates how to compute the final value using the formula. He reminds the viewer to use square units in the final answer, as square units equal the area. To find out the ...
In this home-computing how-to from the folks at Tekzilla, we learn how to use the Energy Saver preference pane to program an Apple Mac OS X computer to shut itself off or turn itself on at a specified time. For all of the details, and to get started using this lesser-known trick on your own Mac, watch this video guide.
Want to make sure a message doesn't fall into the wrong hands? Try embedding it in a web image. With the Mozaic Encrypt web app, it's both quick and simple. For all of the relevant details, and to get started adding secret messages to image files yourself, watch this home-computing how-to from Tekzilla.
In this clip, you'll learn how to use the quickly lock the screen of an Apple Mac OS X computer with the Shift + Control + Eject keyboard shortcut. For more information, including a complete demonstration and detailed, step-by-step instructions, watch this helpful home-computing how-to from the folks at Tekzilla.
Wish finding Greasemonkey scripts were easier? With the Greasefire Firefox addon, it's super easy! So easy, in fact, that this home-computing how-to from the folks at TekZilla can present a complete overview of the process in just over two minutes. For more information, including step-by-step instructions, take a look.
In this clip, you'll learn how to synch bookmarks between two or more installations of Chrome. It's easy! So easy, in fact, that this home-computing how-to from the folks at TekZilla can present a complete overview of the process in just over two minutes. For more information, including step-by-step instructions, take a look.
Interested in creating a map of all of your Facebook friends? With Microsoft's Bing, it's easy! So easy, in fact, that this home-computing how-to from the folks at TekZilla can present a complete overview of the process in just over two minutes. For more information, including step-by-step instructions, take a look.
When it comes to closing applications in Mac OS X, there are more options available than just clicking the little red circle in the left-hand corner of an application window. There are, in fact, 10 different ways in which a person can quit an app. And this handy home-computing how-to demonstrates each and every one of them.
Want to put the extend the OS X menu bar to a second monitor? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Interested in viewing old, historical photos of the places you know on Google Maps? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Interested in adding a spell check function to any Windows application? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Need help figuring out how to remotely unauthorize a computer from accessing a file you've downloaded from iTunes? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Want to Google Earth-style bird's eye view of a given address? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Want to know how to find and play a Flash version of Pac-Man on Google? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Looking for a quick guide on how to use autoscrolling in Firefox? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Interested in making Firefox save your browser state more frequently to protect against crashes and outages? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Wish there were a way to unclose a Chrome tab you've accidentally clicked away? Well, there is, and this clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Looking for a way to keep up with your favorite YouTube channels via RSS? This clip will show you how it's done. It's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Want to create Mac-style stacks in your Windows 7 taskbar? This clip will show you how it's done. With Piles, it's easy! So easy, in fact, that this handy home-computing how-to from the folks at Tekzilla can present a complete overview of the process in about two minutes' time. For more information, including detailed, step-by-step instructions, take a look.
Why invest time and energy proofreading everything you write when your web browser can do it for you (and quite competently at that)? With Mozilla Firefox and Google Chrome (and the After the Deadline browser extension), setting up automatic spell and grammar checking is an easy task. This home-computing how-to from Tekzilla will walk you through the process. Avoid careless mistakes and needless embarrassment with this how-to.
Learn how to force the Windows 7 taskbar to display a preview for each and every one of your Mozilla Firefox tabs upon mouse-over. This home-computing how-to from the people at Tekzilla will show you a quick and easy about:config Firefox hack that will permit you to do just that. For more information, and to get started using this hack yourself, give this clip a look.
This week's news that Magic Leap's patents had entered collateral limbo, now in the hands of JPMorgan Chase, threw a dark cloud over the company.
Those of us who are actively developing for the HoloLens, and for the other augmented and mixed reality devices and platforms that currently exist, are constantly looking for the next bit of news or press conference about the space. Our one hope is to find any information about the road ahead, to know that the hours we spend slaving away above our keyboards, with the weight of a head-mounted display on our neck, will lead to something as amazing as we picture it.
Cool! A cloud in a bottle! You can make one yourself by watching this little how-to. You'll need a bottle, a bike pump and a little attachment from the hardware store.
Two dimensional objects are measured in terms of perimeter and areas. A perimeter of a two dimensional object is the distance around that object. If you want to find the perimeter of an object, all you need to do is add up each one of the lengths of sides of that object. If you have a small figure like triangle, first compute the length of the three sides. Now adding these three sides gives you the perimeter of the triangle. A larger or more complicated shape might have more number of sides. ...
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...
Some savings plan pays interest 365 days in a year but you make deposit monthly. You can use Excel functions to calculate the maturity value of the of the monthly plan. To do this you have to use the nominal and effect functions before using the future value functions. First enter the know data like the monthly payment, the number of years of payment, the number of days in a year, and the annual percentage rate. First take the nominal rate and calculate the effective rate with the help of eff...
In this video the instructor shows how to find out an equation of a perpendicular line. If you need to find the equation of a line passing through the given point and is perpendicular to another line, the first thing you need to do is compute the slope of the given line. Obtain the slope of the equation by writing it in the form of y = mx + b. Now the product of slopes of two perpendicular lines is a negative one. So the slope of our required line will be the negative inverse of the slope of ...
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 ...
In this video the instructor shows how to find out an equation of a perpendicular line. If you need to find the equation of a line passing through the given point and perpendicular to another line, the first thing you need to do is compute the slope of the given line. Obtain the slope of the equation by writing it in the form of y = mx + b. Now the product of slopes of two perpendicular lines is negative one. So the slope of our required line will be negative inverse of the slope of given lin...
In this tutorial the instructor shows how to compute the Surface Area of a Cone. He explains that you need to find the individual surfaces areas first. Hence the bottom part of the cone which is circular can be calculated as Pi*r*r, where r is the radius of the base circle. Now for the sides surface of the cone, it looks like a sector and he derives its area thorough some deduction. Now he adds both the base surface area of the cone, and the lateral surface of the cone which finally gives the...
In this video tutorial the instructor shows how to derive the formula to compute interest compounded annually. He starts with explaining the basic concepts like principle which is the amount you borrow and the rate of interest or annual percentage rate (APR), which is the rate at which you pay the interest up on the borrowed principle. He shows that the amount after the end of one year is amount A = P(1+APR),and he goes on and generalizes how to compute it for n years. This video shows how to...
This tutorial the shows how to find out the measure of an exterior angle of a regular polygon. He shows the formula to find it which is 360/n, where n is the number of sides of the regular polygon. He goes on further to explain the formula by taking an 18-sided regular polygon as example and computes its exterior angle as 360/18, which is 20 degrees. If you are looking to compute the exterior angel of a regular polygon, follow the procedure given in this tutorial.
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...
In this tutorial the instructor shows how to find the surface area of a sphere. He explains the equation to calculate the surface area of a sphere as 4 * Pi * r * r , where r its the radius of the sphere. Now if you have the radius of the sphere, by substituting its value in this equation and substituting the value of Pi, you can obtain the surface area of a sphere. If you want to compute the surface area of a sphere watch this video where it is clearly explained how to compute it along with ...
In this tutorial the instructor shows how to compute the area of irregular shapes. He demonstrates this with an example showing an irregular area and says that as there is no direct formula to calculate it, you need to break up the irregular area into identifiable simple geometric figures. He goes on and breaks the irregular shape into a square, a triangle and a trapezoid. Now he computes the individual areas using a standard formula and sums them up to arrive at the final complete area of th...
Cloud drawing is a snap, and it's a great place to learn how to smudge your pencil lead when you are drawing.
On Thursday, Mojo Vision, a startup comprised of former engineers from Apple, Amazon, Google, and other Silicon Valley mainstays, emerged from stealth backed by $50 million in funding for a hands-free augmented reality platform that runs without smartphones, tablets, or other devices.
This week, we continued our NR30 series highlighting the leaders of augmented reality space by profiling the venture capitalists and strategic corporate investors that sustain the industry.
