The last one was used in 1521 at the siege of the Aztec capital. After the siege of the Aztec capital catapults became much better at launching objects farther then trebuchets and were very compact and can be moved easier and quicker. Unlike trebuchets catapults use a very unique system of ropes that create torsion to throw objects. Now as time goes by better ropes were made allowing for more load on the rope creating farther distances and now most modern day catapults use steel cables which allow for max load and can throw a 8 pound stone 1500 feet! Now a 8 pound stone sounds very pitiful to knock down a giant wall but it’s a 8 pound stone being launched at 120mph keep that in mind.
Today, a safer method of making dynamite (and also more common) is combining nitroglycerin, nitrocellulose (a highly flammable material that is made by treating cellulose with nitric acid) and ketone. The chemical equation for nitroglycerin is C3H5(ONO2)3. Dynamite can be made with other products (such as ammonium) but this is less common and can be more dangerous. The overall main explosive reactant within dynamite is the nitroglycerin. When dynamite explodes, it causes an exothermic reaction.
Introduction! With the invention of vehicles that can travel at speeds that would have been near impossible for humans earlier on, there are precautions that are needed to be taken to make sure that these vehicles would not cause the death of thousands of drivers and pedestrians. Travelling at high speeds and if a sudden stop were to occur it would be painful if not deadly as the inertia of out body will make it so that our body will continue at the speed of the vehicle for a time until we either are stopped by an object directly connect to the now still vehicle or we were decelerate to the point where we stop which could lead to fatal injury. The seatbelt is an invention that was designed to be the object that is directly connected to the vehicle in an attempt to make injuries from the vehicle less deadly.! !
These words were; smashed, collided, bumped, hit and contacted. The dependent variable was the speed estimates given by the participants Results Verb Mean estimate of speed (mph) Smashed 40.8 Collided 39.3 Bumped 38.1 Hit 34.0 Contacted 31.8 Conclusion The results in the table show that the phrasing of the question brought about a change in speed estimate. With smashed eliciting a higher speed estimate than contacted. So the harsher the verb used the faster the students thought the cars were travelling at. Evaluation The Experiment was conducted in a lab study, so enables researchers to have high control over variables (eg.
Cars with stick shifts have more power, and tend to respond better when you accelerate. Another reason for driving stick shifts is that it is just more fun! Stick shifts will make your driving more interesting. Race cars, for example, do not use automatic transmissions. Race drivers use the stick shift to take driving to a higher level for maximum
In nearly all rear-end crash test collisions, the Pinto's fuel system would rupture extremely easily. The technology was available to make the Pinto a safer vehicle. The best method for improving the safety of the Pinto was to line the gas tank with a rubber bladder. Ford alleged that it would cost $11 per car to add any sort of gas tank fire prevention device. Lee Iacocca, who was in charge of the development of the Pinto, had specifications for the design of the car that were uncompromisable.
Engines in a hybrid are very different and designed totally different than a regular gas engine. A hybrid engine is a small gas engine combined with an electrical engine, while a gas engine is a lot bigger and runs fully on gasoline. The main reason hybrids have a electrical engine in them is to save money on gas by using the electricity stored in the batteries to run the vehicle instead of just using all gasoline. Safety is a very important part of a car and help save lives all the time in car accidents. Gasoline vehicles are viewed as not as safe as a hybrid vehicle for the passengers and driver; even though the hybrids and gasoline versions of a car have the same safety features, the one reason hybrids are considered safer than a gasoline vehicle is because on average a hybrid vehicle weighs roughly ten percent more than a gasoline vehicle (Nasdaq).
If a firework isn’t packed right, it won’t shoot off into the night sky. The power needed to lift each firework into the air is provided by the highly exothermic combustion of black powder, a slow burning combination of 75% potassium nitrate, 15% charcoal, and 10% sulfer(Conkling J. 1985). As soon as the shell reaches the perfect height, it is then that it explodes. During the explosion not only are gases produced quickly, but they are also hot, and they expand rapidly, according to Charles’ Law, which states that as the temperature of enclosed gas increases, the volume increases, if the pressure is consistent(Antonis, K. 2010).
Drivers that text while driving are 4 times more likely to get into crashes serious enough to hurt themselves or someone else. 1. According to a study teenagers are more suseptible to car crashes and fatal road crashes. 2.One of the surprising statistics about texting while driving is that it is more dangerouse than driving under the influence of alcohol or marijuana. C. Considering the distraction of the driver in texting while driving, this activity keeps the driver involved in texting for around five seconds, which on a highway means a hundred yards.
When you are speeding in your car the greater the speed you are traveling the greater the impact in an accident. It is different if you are going 30 miles an hour and you hit a tree, than if you are going 60. When you are going that fast you are also killing the chance of you or anybody getting out unhurt. Another thing you kill is your reaction time. You have less reaction time when you are speeding.