1.0 Introduction
1.1 Research Question, Aim and Hypothesis
1.1.1 Research Question
What are the best modifications to increase the launch height of a 1.25L water rocket?
1.1.2 Aim
The aim of the experiment was to investigate the effects of changing the air resistance and stability of the rocket and how it affects the rocket’s launch height when the air pressure and water volume is kept controlled.
1.1.3 Hypothesis
That by reducing the air resistance with a parabola shaped nose cone and tapered swept fins and increasing stability with the fins by pushing the centre of pressure back behind the centre of mass we would have achieved the greatest launch height that what was believed.
1.2 Justification of Hypothesis
Air resistance affects a rockets drag and stability. The amount of air resistance that has effect on a rocket’s velocity primarily depends on the shape of the nose cone. According to Newtons First Law an object in motion will stay in motion with the same speed and direction unless acted upon by an unbalanced force (Teacher Tech, 2018). This means that the rockets will remain in the air until the force of drag is acted upon it, slowing the rocket
…show more content…
Although this did not support the hypothesis of tapered swept fins and the parabolic nose cone it does prove that the parabolic nose cone performed better. The parabolic shape was the best nose cone as stated in the hypothesis justification that it has the lowest drag coefficient and this proved correct in the experiment. The fins on the rocket may have cause more drag and unbalance then what was meant due to the material they were produced from and the situation it was made. This would have been why the experiment should the launch height dropping when the fins were put on and would require further testing to
In this book, it talks about a woman named Henrietta Lacks, and her cells were such an amazing experience for all scientists. It was such a shock of what they saw in her tests. Henrietta Lacks was born on August 1st, 1920. Henrietta died of cervical cancer on October 4th, 1959, at the age of 31. Cells taken from her body were used to form the whole cell line.
They used a skate embryo and injected it with Vitamin A (which makes the Sonic hedgehog gene to come out) and waited to see what happened. Sure enough, the skate had an exact replica of another fin (Page 57). This showed that Sonic hedgehog can be present but it doesn’t have to do anything. They were looking for the rods in the fins to get closer to each other showing a change that the Sonic hedgehog caused but there was
In my hometown of Waterdown Ontario, there is rarely a minute when the main downtown area is not buzzing with people. In my opinion, the downtown area of Waterdown is alive and lively. Whether people are shopping in one of the variety of stores, grabbing a bite to eat at one of the numerous restaurants or cafés or just driving through, downtown is easily the focal point of town and continues to increase in chaos as Waterdown continues to grow and suburbanize. In Waterdown, the downtown core is where almost every shop and store is located. If you want to do anything from buy groceries to take a pottery class, you do so downtown.
The Edmund Fitzgerald is a big mystery like the Titanic and just like the Titanic it has lots of theories on how it sank but to pacific there was 4 theories on how it sank on November 10, 1975 on lake Superior. People still don’t know what happened to the Edmund Fitzgerald till this day or what happened to her crew 29 men because no one lived to tell the tale of the Edmund Fitzgerald. There are many theories on how it sank to be exact there was 4 theories anyway. I choose the 4th theory. I believe in this theory because in the text titled the “Theory : 4Three Sisters” it talks about how the Edmund Fitzgerald could have sank by the Three Sisters the Three Sisters is a Lake Superior phenomenon that has two huge waves and later a monster wave as the
At the beginning it would be zero and when you ignite it the pressure rapidly increases then once it hits the ground again the pressure would decrease rapidly(Getting a Bang Out of Breath Spray). The mass of the object being launched is equal to the mass of the reactants(Helmenstin, Anne
Western times and water wars (Walton, 1991) is a book of historiography and sociological interpretation of the story of Owens Valley California. At the heart of the Owens Valley story is a conflict for water, and collective actions against powerful, dominant forces. Walton covers the Owens Valley story in its entirety, from the resettlement period when the Paiutes inhabited the territory, to modern day. By detailing the one hundred plus year history, the changing sources of conflict and resistance could be explored over time.
A. The invention of rockets is totally linked with the invention of 'black powder '. Most historians of technology credit the Chinese with its discovery. They form their belief on studies of Chinese writings or on the notebooks of early Europeans who settled in or made frequent visits to China to learn about its history and civilization. It is possible that, during the tenth century, black powder was first constituted from its primary ingredients of charcoal, sulphur, and saltpeter.
Report of Sylvia Frey’s Water From the Rock: Black Resistance in a Revolutionary Age Sylvia Frey’s Water from the Rock is meant to convey the deeper meaning of the American Revolution and the determination, line of events and the opportunity for black resistance in America. Frey lays the book out by discussing the economical and geographical differences in America and the effects of this on racial segregation. The pre-Revolution south in America had a highly successful economical basis in slavery.
In this section, discuss the research question(s) or hypotheses presented in the article. • There were two research questions presented in the article. The first question was how much variation in counselors’ self-reported multicultural counseling competencies is accounted for by a set of demographic, experiential, and training variables. The second question was how multicultural training explains additional variations in multicultural counseling competencies after accounting for the variation in competencies due to demographic and experiential variables. The purpose of the study/research problem was clearly identified within these two questions.
In conclusion, air pressure has a direct influence on the distance that the ball will travel when thrown. The hypothesis stated that if pressure is added to the football, then the distance the ball projects will increase when distance is a function of pressure. Based on the data that was collected from the experiment, the hypothesis was supported. When the football had more air inside, it went the farthest distance compared to the other two pressures that data was collected from.
Essayist and Novelist David Foster Wallace, in his speech, “This is Water,” defends the true purpose of a liberal arts education, and emphasizes the necessity of thinking the right way in life. Wallace attempts to create a humble, personal tone through the use of informal diction, ethical appeals, and personal encounters in order to connect with his audience and shift them to see that they are not alone in this struggle, and they must prevail in order to truly be “living.” Wallace’s argument is successful due to the implementations of this tone, ethical appeals, and repetition of purposeful phrases. Wallace’s informal or low diction is shown through the use of words such as, “finger wagging,” “bullshit,” and, “god-damn people.” The effect of these words is the creation of a laid back, personable tone that ensures the audience does not feel like Wallace is “preaching” to them or giving them “moral advice.”
The container was built to decrease the impact of the force at each drop. The container was able to successfully protect
. SUPER HYDROPHOBICITY Soumya Ranjan Sahoo (711CH1025) NIT, Rourkela Abstract: Superhydrophobicity as a sensation has turned into an increasing focus of research and technological movement, where its key viewpoints span surface chemistry, chemical physics, and cellular biology. Hydrophobic particles have a tendency to be non-polar and, accordingly, incline toward other neutral molecule and non-polar solvents. Hydrophobic atoms in water frequently bunch together, shaping micelles.
Its material and light-weight allows air resistance and its spin to have significant effects on its motion when airborne. Air resistance is the result of the projectile’s leading surface colliding with air molecules, and it is affected by the velocity of the object and its cross-sectional area. Specifically, a higher velocity and greater cross-sectional area results in greater air resistance. Additionally, ping pong balls allow bounce quite high when they strike a surface. 3.1.2 Physics of projectile motion Since the launcher will launch the ping pong ball so that it launches with a parabolic trajectory, the physics behind projectile motion comes into play.
With the development of the jet engine; the design of aircraft wings was changed as well. Wings were given a more “swept” design in order to reduce the overall drag of the aircraft. Drag is the force that counteracts the thrust component of aircraft flight. This new wing design was also more structurally sound. This allowed for the variations of pressure on