Topics: Science & Technology
View our latest show science debates.
Posted by Mark Daly on October 7, 2009, 2:33 pm.
When performing additions and subtractions with fractions containing different sets of denominators a common denominator needs to be found for the calculation to take place.
Posted by Mark Daly on October 7, 2009, 11:31 am.
As with the subtraction of fractions, the key for adding to fractions with different denominators together is to find a common denominator.
Posted by Mark Daly on October 7, 2009, 11:31 am.
Subtracting one fraction from another while both have different denominators without the help of a calculator is a pretty much impossible task. Unless you happen to know the exact numeric value of the fractions. Luckily enough though there is a method that can be applied to carry out the subtraction anyway.
Posted by Mark Daly on October 7, 2009, 11:17 am.
Dividing fractions by hand (or with your head) is one of those tasks that seem impossible, unless you have actually learnt how to go about it.
Posted by Mark Daly on October 7, 2009, 10:46 am.
Multiplying fractions without the help of a calculator can at a first glance appear to be a puzzling task. Fear not however, once you understand the workings of it you will see that there is nothing to it.
Posted by Mark Daly on October 6, 2009, 4:11 pm.
On a two dimensional chart the distance between two points can be calculated using the Pythagorean Theorem, used in geometry to calculate the missing side of a triangle that does not form a rectangle corner.
Posted by Mark Daly on October 6, 2009, 2:48 pm.
Calculating the surface area of a parallelogram is not really that different from calculating the surface area of a rectangle.
Posted by Mark Daly on October 6, 2009, 2:35 pm.
Two components are necessary to calculate the surface area of a triangle. The first is the pyramid's base width. The second is the pyramids height.
Posted by Mark Daly on October 6, 2009, 2:23 pm.
To calculate the surface area of a sphere, you will need to use a similar formula to calculating the surface area of a circle.
Posted by Mark Daly on October 6, 2009, 2:13 pm.
To calculate the volume of a sphere we need to make use of a formula which will make little to no sense to an untrained mathematical eye. Indeed the main components are Pi and the radius.
Posted by Mark Daly on October 5, 2009, 2:27 pm.
Similar as with a previous tutorial that I have written, where the volume of a pyramid can be derived from the volume of a rectangular solid, we can derive the volume of a cone from the volume of a cylinder.
Posted by Mark Daly on October 5, 2009, 2:13 pm.
Calculating the volume of a Pyramid may sound difficult, but in reality it is a piece of cake. Indeed, using the base width, base height and triangle height we can calculate the volume of a Pyramid in no time.
Posted by Mark Daly on October 5, 2009, 1:40 pm.
As so often in geometry when it comes to calculating surface areas, two different components need to be added up. With a cylinder we have the following components: the two circle areas at each end of the cylinder, and the surface that surrounds the pipe itself.
Posted by Mark Daly on October 5, 2009, 12:13 am.
The volume of a cylinder (or a pipe) can be calculated using two components. The first is the surface area of the circle at each end. The second is the height. It is the multiplication of these two components that makes the cylinder three dimensional, thus calculating its volume.
Posted by Mark Daly on October 5, 2009, 10:53 am.
To calculate the surface area of a trapezoid we need to think of a rectangle. This might sound a bit strange at first, but if you bear with me you will see why the formula for calculating the surface area of a rectangle, and that for calculating the area of a trapezoid is not that different.
Posted by Mark Daly on October 5, 2009, 10:33 am.
To calculate the circumference of a circle two elements are necessary. Either the diameter or radius of the circle and Pi.
Posted by Mark Daly on October 5, 2009, 10:07 am.
As I stated in a previous Geometry Tutorial on how to calculate the surface area of circles, Pi describes the relationship between the circumference of a circle, and the circle's diameter. The size of the circle does not matter. It can have a radius of 10mm or 100000 KM, Pi will never the less be applicable.
Posted by Mark Daly on October 5, 2009, 9:36 am.
To calculate the surface area of a circle two separate elements are required. The first is the circles radius. In case you did not pay much attention at school the radius is half of the circle's diameter. The second element that we will require is Pi (?).
Posted by Steven Rush on September 4, 2009, 8:28 pm.
Previously I have discussed how Parental Controls can be used to block your child's access to a set of defined websites. However, parental controls can be used for far more. In particular you can set time restrictions as of when your child's user account should be accessible. Ideal therefore to keep their computer access of limits when you are out and they are supposed to be focusing on their homework.
Posted by Steven Rush on September 4, 2009, 6:33 pm.
As useful as the internet might be, its creation has also brought about one of the biggest distractions and forms of escapism known to mankind. And if even grownups spend countless hours at work surfing around on websites like Facebook and Twitter, how can you expect a child who has been brought up with the internet to be capable of resisting such temptations.
Posted by Garren Harland on August 20, 2009, 12:22 am.
This is something that I always find rather shocking. Sure, I understand that not everyone has had a chance to learn how to touch type. And much like I would rather shave my eyebrows than learn French, a lot of people would rather stare at their keyboard whilst typing than spend a few hours with a touch-type tutorial. What I can't quite get my head around however, is why a lot of people deliberately choose not to memorise a few simple shortcut keys.
Posted by Garren Harland on June 30, 2009, 11:58 am.
Even if you have a brand new computer, if you do not maintain it properly it will at some stage start slowing down. Usually though there are things you can try to get your computer back up to speed. Most of the causes are not hardware, but instead, rather software related. This is a good thing, as it gives you some level of control over your computer's destiny! Here are 8 simple steps to help revive your PC.
Posted by Garren Harland on June 26, 2009, 1:31 pm.
Could pneumatic tires soon become a thing of the past? Although they have served us well for over a century, both Michelin and Resilient Technologies have attempted to build a replacement: the non-pneumatic tire. Or as Michelin has dubbed it: the Tweel!