Three, two, one, fire! This is the command you would have heard right before the hit of rocks, stones, or even dead animal meat which left holes in crumbling castle walls in medieval times. The source of the projectile, and one of the most feared weapons of medieval times was a trebuchet, a powerful machine used to hurl projectiles. Trebuchets were able to throw massive objects at high speeds over great distances with great accuracy. Hurling objects into the air with great force has sparked great interest about the construction and operation of trebuchets.
History paper #1 Gunpowder also called black powder is considered the earliest explosive invented. The Chinese alchemists of the ninth century were considered to be a major force behind the early development of gunpowder. They first used the substance to treat skin diseases and to kill insects before people realized it would be an advantage to them on the battlefield if used as a weapon. The discover that the substance could be used at battle was found through experimenting. One of the experiments conducted was, attaching bamboo tubes filled with gunpowder, to arrows and launching them with bows.
Chariots was invented in Mesopotamia to carry a driver and an archer for war. It was invented to be used in war and the main concept of a chariot was to keep moving constantly and shoot the enemy at a distance. Chariots were transmitted in different countries like china, Greece, and Europe by trade, travel, conquest, and migration. Chariots were transmitted to Egypt by the Hyksos, which are charioteers from Syria. The Egyptians improved chariots by modifying its design making it lighter and easier to use.
In order to be a tornado it has to be in contact with both the ground and the cloud base. A tornado is not always visible, however, the intense low pressure caused by high wind speeds and rapid rotations usually causes water vapor in the air to become visible, that’s why they can be seen. They rotate in cyclonic clockwise direction to move. Just because they are natural phenomenons that cause destruction, it doesn’t mean they are not beautiful and incredible. By only looking at a picture and forgetting that it can cause destruction you can see that they are something you obviously don’t see everyday and are a very interesting topic to discover and know more about.
This animalistic metaphor used by the author describes a process of fire growing from a rather small and fast squirrel to a furious and ruthless jaguar. William Goldberg structures this passage in a way that it rolls of the tongue naturally, as if the rhythm keeps the quick pace with the extension of the fire. Besides he uses a great amount of verbs, such as ‘festoon’, ‘stir’, ‘crawl’, ‘gnaw’, and ‘fledge’, which brilliantly illustrate the speed and the character of an action and describes the terrifying sound of the fire as a ‘drum-roll’. However, this ‘ splendid, awful sight’
The trenches were ensured to be constructed in a zig-zag pattern because this design prevented a direct line of fire down a single line, if a trench were to be taken over by the enemy. Many new technological advancements had taken place during WWI, Roden’s letter had described the very minute amount of weaponry that Roden had seen. “Before attacking they used burning liquid on our trenches, and the whole line of trenches were one mass of flames for about 15 minutes. It was a marvel to see how they sent it across. It was worse than gas.” Napalm was a brand new substance that was introduced by the Germans, which was a jelly like substance that could be easily transported and when ignited, would burn ferociously for a long period of time.
The great military debate that has existed for decades attributes to which firearm has the better rifle platform, Eugene Stoner’s M-16 or Mikhail Kalishnikov’s AK-47? Both are used extensively by police and military forces around the world. These two weapons platforms have been going head to head against each other in various military conflicts around the world for nearly 50 years. Still, each seems to shine in their own particular way. As a primary infantry weapon of modern military forces, these two types of assault rifles have become the most widely used firearms in the world.
Machine guns were built twice more powerful than in the Civil War, firing up to 600 bullets a minute which was the equivalent of 250 riflemen. Artillery experienced a massive technological progression with the building of several thousands of powerful cannons with shells filled with tiny pellets that exploded deep into the ground. Gas grenades were introduced that caused blindness and destruction of the lungs of the enemies. The invention of the telephone and radios
[5][6] Contents [hide] 1 Greek and Roman catapults 2 Modern use 3 Models 4 See also 5 Notes 6 External links [edit]Greek and Roman catapults Ancient mechanical artillery: Catapults (standing), the chain drive of Polybolos (bottom center), Gastraphetes (on wall) Roman 'catapult-nest' in the Dacian Wars The early history of the catapult and the crossbow in Greece are closely intertwined. Primitive catapults were essentially “the product of relatively straightforward attempts to increase the range and penetrating power of missiles by strengthening the bow which propelled them”. [7] The historian Diodorus Siculus (fl. 1st century BC), described the invention of a mechanical arrow firing catapult (katapeltikon) by a Greek task force in 399 BC. [8][9] The weapon was soon after employed against Motya (397 BC), a key Carthaginian stronghold in Sicily.
Description: In these series of experiments the apparatus we used was a spring gun that for the first experiment shot a steel ball freely which eventually struck the floor. For the second and third experiments the gun fired the steel ball into a pendulum. To measure the velocity of the steel ball, when it was launched freely, carbon paper and a 2-meter ruler were used to determine the distance it travelled and then kinematics were used to calculate the balls initial velocity. When the steel ball was launched into the pendulum the laws of conservation of energy and momentum were utilized to determine the balls initial velocity. Theory: 3 Kinematic Measurement of Speed In this experiment the steel ball was moving in two dimensions both horizontally and vertically.