who invented
December 9th, 2011 at 12:30pm
Under who invented
Judo is a full contact martial art that originated from Japan. The object is to throw or takedown your opponent to the ground, immobilize them with a grapple or to force an opponent to submit by joint locking, strangle hold or choke. Unlike many other forms of combat the aim of judo is to avoid the strength of the opponents and use that strength against them. Like other martial arts, judo uses a ranking system that is shown by colored belts worn with white uniforms. Let’s take a look at who invented this popular martial art.
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Who Invented Judo
December 5th, 2011 at 05:54pm
Under who invented
Teddy bears are soft stuffed toy that are designed to look like a bear. They are popular gifts to show affection, collected by teddy bear enthusiasts and are also much loved by children all around the world. It is estimated that the retail sales for teddy bears in 2011 will top $1.5 billion. Let’s take a look at who invented this popular toy.
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Who Invented the Teddy Bear
November 27th, 2011 at 01:02am
Under who invented
If you take a look at the first 6 letters on the top line of your keyboard and you will mostly likely see QWERTY. This is the most commonly used arrangement of keys in keyboards today. In fact, we are so familiar with this combination that it is used on many other devices as well. If you have ever wondered who came up with this combination, keep reading to find out.
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Who Invented the QWERTY Keyboard
November 19th, 2011 at 01:00am
Under who invented
The Thermos Flask, also known as a vacuum flask, is a vessel mostly used for storage of hot or cold liquids. It uses the principle of a vacuum to keep the contents warmer or colder than the surrounding environment. It consists of two vessels and one is placed inside of the another. The small space between the vessels is evacuated of any air allowing a vacuum to form. This vacuum stops the transfer of heat between the middle container to the outer container and then into the outside environment. They are generally made of glass, plastic, metal and foam. Thermos flasks have a reflective coating that further diminishes heat transfer.
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Who Invented The Thermos Flask
November 1st, 2011 at 12:50am
Under who invented
Volleyball is a popular team sport with two teams that are separated by a net. The goal of the game is to score points by grounding the ball in the oppositions area, or when the other team commits a fault (touching the net, hitting the ball outside the court, hitting under the net etc.). Each team is allowed to touch the ball 3 consecutive times, but it must be hit to the oppositions court on the 3rd touch. The ball cannot be caught, thrown or kicked and must be hit with the hard or arm only. Let’s take a look at who invented this unique sport.
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Who Invented Volleyball
October 30th, 2011 at 12:38pm
Under who invented
The protractor is a mathematical instrument used for measuring or drawing angles. Most protractors use degrees as the unit of measurement and this is printed on the device. The two main types of simple protractors are the half circle protractor (180 degrees) and the complete circle (360 degrees). There are also more complex models such as the bevel protractor and 3 arm protractor (station pointer). Continue reading to find out who invented this important measurement tool.
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Who Invented the Protractor
September 28th, 2011 at 05:14pm
Under who invented
The ceiling fan is an electronic device with rotating arms, called blades, that is attached to the ceiling to help circulate the air. They rotate relatively slowly and work on the principle of introducing air movement into a still, hot room. Unlike an air conditioner, a ceiling fan does not cool the actual room itself. They rely on evaporative cooling, which helps to speed up the evaporation of perspiration on the human skin. This is certainly not as effective as an air conditioner, but they are quite effective and very popular because they use far less power than an air conditioner. Let’s take a look at who invented the ceiling fan.
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Who Invented the Ceiling Fan
August 22nd, 2011 at 12:53am
Under who invented
From the time we get our first teeth we have all been taught that brushing our teeth is very important. Brushing our teeth not only keeps our mouth clean, but it also prevents the buildup of plaque and tartar. This can cause problems such as tooth cavities and gingivitis (gum disease). Although a manual toothbrush is very effective for cleaning your teeth when used correctly, there are certain situations where an electric toothbrush is highly beneficial. If you have ever wondered who invented this useful device, read on to find the answer.
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Who Invented The Electric Toothbrush
August 16th, 2011 at 12:30am
Under who invented
A doorbell is any device that is used to alert the owner to the presence of a visitor. Traditionally these devices were simply a bell that was hung close to the front door. This was connected to a short rope so it could be rung. Prior to the invention of the doorbell, door knockers were commonly used on the front door. The modern versions utilize electricity to send a chime or other tone throughout the house. Today, it is very common for households to have an electric doorbell, especially if they have a large house. If you have ever wondered who invented the useful device, continue reading to find out.
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Who Invented The Electric Doorbell
August 10th, 2011 at 06:02pm
Under who invented
A kettle is a small kitchen appliance used for boiling water. The most common use for a kettle is for making tea and coffee, and this is where it gets its alternative name – the tea kettle. The two main varieties of kettles, the stovetop kettle and the electric kettle. The first is placed on a stovetop to heat the water, and the electric kettle utilizes a heating element that is powered by electricity. If you have ever wondered who invented this useful appliance, continue reading to find the answer.
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Who Invented The Kettle
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