Why Boomerangs Come Back

Making a foam boffer sword for LARPing (Live Action Role Playing) is quite simple and affordable. Boffer swords are simply handmade weapons used on the battlefield during LARP events, which typically consist of either a small group of friends or a massive gathering of many people. They are quite sturdy and withstand a large amount of hits as long as they are made well. This depends largely on the amount of effort and time given to the project, as well as choices of materials used. Foam boffer swords allow the LARPer to express his or her creativity, while producing a weapon that will aid them on their adventures.

The farthest back we have found of a recorded trebuchet was in ancient China approximately 300 BC. the trebuchets made by the chinese had not been counterpoise but traction trebuchets. These trebuchets are called traction trebuchets using ropes and pulleys to pull the arm down the energy being supplied via manpower these teams had about 40-50 men teams: 10 men for

How is the boomerang able to fly back? (Because of their special curved shape, the two wings of the boomerang spin and create unbalanced aerodynamic forces. This disproportionate “lift” on the boomerang causes its flight path to form an egg shape, returning it to the thrower. Also, see the STEM extension to go deeper into this question.)

The first cannon was found in Sweden and was dated back to 1326. It was used at the battle of Crecy in 1346. Cannons changed the tide of the war. They could take down ships blow up groups of people and you could stuff screws and nails in the cannon and fire it called grape shot. The first step to load a cannon is you take the worm (sacrapos) and Coleman the barrel. The second step is to use the Ladle (Cuchara) and lightly dip it in the waste and stick it down the barrel, to make sure all the sparks are out. The third step is to put the cannon gal, i. With a bag of gunpowder and use the rammer (Atacador) to pack them in the cannon. The fourth step is to use the Vent Pick to break the bag of gunpowder. The fifth step is to step back and light the

A group of wireless sensor nodes (devices) dynamically constructs a temporary network without the exercise of any pre-existing network infrastructure or centralized administration. The main goal of ad-hoc networking is multihop broadcasting in which packets are transferred from source node to destination node through the intermediate nodes (hops). The main function of multi hop WSN is to enable communication between two terminal devices through a bit of middle nodes, which are transferring information from one level to another level. On the foundation of network connectivity, it dynamically gets to determine that which nodes should get included in routing, each node involved in routing transmit the data to further

The movies/stories of High Noon and The Most Dangerous Game are very similar but different in a way. Kane and Rainsford are the main characters of the stories. The two are being hunted down by their arch enemy. Frank Miller is Kane's enemy, and Zaroff is Rainsford's enemy. Kane's best friend, Harvey, wants to be in charge—the Marshall—after Kane leaves town with his new wife Amy. Rainsford defeats Zaroff, and he might take charge at Ship Trap Island if he decides he wants to. Frank Miller's crew hasn't done anything wrong yet to get arrested; however Zaroff did.

A second force that paper airplanes need to overcome is gravity and to do that you need keep your paper airplane's weight to a minimum to avoid gravity pulling your paper airplane down towards the ground. Thrust and lift are two other forces that help your paper airplane have longer flight. Thrust is the forward

Why does a basketball bounce higher than a bowling ball? Because it is made of different materials. A basketball is inflated with air and made with a rubber covering that has a high bounce factor. Bowling balls are made out of hard materials that don’t bounce. Why is bounce good for a basketball and not so good for a bowling ball? Using a baseball to play basketball or a bowling ball to play tennis doesn’t make sense. Different sports require the height from which the ball is dropped the ball’s level of ignition temperature the surface upon which the ball is bounced. The higher the ball is above the ground, the more its potential energy. As the ball is dropped and gravity forces it downward, the ball accelerates and gains speed. As the ball falls through the air, its potential or stored energy is converted into kinetic energy. The longer the fall, the more kinetic energy it gains and when it hits the ground, it bounces higher. As a ball bounces, it warms. An inated ball, like a basketball, bounces higher and faster when the temperature is warmer. This is because the distance between the air molecules in the ball increases, helping the ball maintain its round shape when it hits the ground. On cooler days, the distance between the air molecules gets smaller, causing the ball to be less inated. So, it attains more when it hits the ground. A lot of scientific research goes into developing the right bounce for the right ball. Several other factors affect the way a ball bounces.

Those who mounted the belly-bow would be launching a type of object with their belly on the launcher and that is where reference belly-bow came to be. The belly-bow consisted of a syrinx, a pipe and diostra, then lastly a slider. It was told that the gastraphetes could launch 40 pounds 200-300 feet in the air. With this new form of technology, Grecian engineers were able to evolve the gastraphetes into what we know as a catapult. The Grecians used a ballista creation of a catapult to launch objects into the desired target. To power the catapult, Grecians would use horse hair and an ox tendon. This helped create tension so that they were able to launch objects farther. In dire times of need, the women would cut their own hair to replace the horse hair. They also implemented wheels within their catapults to roll them to their desired spot. Often, the catapults weighed a few hundred pounds and would be nearly impossible for it to be carried multiple times a day. The wheels also made it easier during times of war. The farther the enemy was the closer the troops could have moved the catapult depending on their accuracy. The town of Syracuse was where most of the catapults that were

After the war people came back with ideas and popular toys came out. Like the hula hoop, it was very popular. But most people don’t know the history of the hula hoop. First wham-o made the hula hoop in 1958. Also it dates back to the 1400’s (Hula Hooping). The history of the hula hoop is how it first was discovered, what it looks like and how it became so popular.

The catapult is an ancient artillery device that used the elastic power of twisted fibers to hurl projectiles. The invention of twisted fiber artillery and siege engines has been credited to the Greeks,from 300 BC. These catapults used a lot of human hair. tons of human hair is how much was needed for these machines.

No one knows when or how kites were invented or their origin, but it is rumored that the kite first took flight in China, and was created when a Chinese farmer tied a string to his hat to keep it from flying in the wind, and

Using a boom to capture plastic and keep it in areas where the boats can come and periodically pick it up

Kites have been around for a while. Although it is debated the first kite was created over 2000 years ago in china. From using kites as distance markers for war, to using them to avert evil sky spirits; kites gave been used for various purposes. In the 18th century the initial novelty of the kite wore off, and so the use of kites went into the field of science. In 1749 a meteorologist used a kite to measure the atmospheric temperature. Of course we can’t forget about the famous experiment conducted by Ben Franklin and his son to prove that lightning was in fact electricity. The kite was also key in the experiments and creation of the first airplane constructed by the Wright brothers. Kites have come a long way in history and have helped advance

Lift is one of the most contested components of airplane flight. There are different theories in how an airplane reacts to air being rushed over its wings. In all actuality the entire airplane promotes lift. Often it is forgotten how the top portion of the airplane and wing plays just as an important role in creating lift as the bottom of the airplane and wing. As stated in How Airplanes Fly “Lift is the force that directly opposes the weight of an airplane and holds the airplane in the air” (Eberhardt). Lift must overcome or be equal to the weight of the airplane (Eichenberger). Lift is produced as the air flows over the body and wings of the airplane as it is moving forward. The wings help to develop most of the lift due to their design. They come in different shapes and sizes, from short wings to very long wings, even a propeller of a helicopter is considered a wing. No matter what size or shape, wings are designed to create lift. According to Newton’s third law, for every action there is an equal and opposite reaction. This means the lift of a wing is equal to the change in momentum of the air it is diverting downward (Eberhardt). Pilots have controls to increase the size of the wing while the airplane is flying, thus increasing lift and helping to keep the airplane flying at slower speeds.