Physics Essays

is coefficient of friction, m is the mass, g is acceleration due to gravity Therefore in this scenario, F = 0.35*440*9.8 = 1509.2 Thus braking force = 1509.2N But F= ma Rearranging this we get Thus deceleration = = 3.43m/s2 s = Thus distance = = 6.25t m But t= 12.5/3.43 = 3.64s Thus distance = 6.25*3.64 = 22.75m Task 2 Question 1 Average angular velocity is 4200 + 360 = 2280rpm = 238.76rad/s I = = 12.5 * 0.12 = 1.5 Rotational Kinetic energy is = I?

where many federal agencies and offices are located. Its population is only about 147,000 which translate to a population density of approximately 9,400 people per square mile. Its total area is 15.4 square miles (15.2 sq. miles of land and 0.2 sq. miles of water); Alexandria is a very historic place because of the key role it played during the American Civil War.

Like other circuit breakers, ABCB also aims to maintain a high voltage arc gap which will withstand over current and voltage, and prevent damage to the components. The high arc voltage is maintained at a level far greater than the supply voltage. For this objective, three techniques may be employed; cooling the arc plasma (which is air), increasing the length of arc path and splitting the arc into a number of series arcs.

Space exploration has emerged as a very controversial subject, to the extent of wondering whether the controversy is inspired by genuine concerns, or by the unwillingness of some people to engage or wait for the tangible benefits accruing from space exploration projects.

The paper explores what alternative clean energy sources are available that can be harnessed successfully to replace fossil fuels and how the issue relates to Saint Leo core values of Integrity and Responsible Stewardship. The following renewable, clean and proven sources are available to meet our energy needs.

This is set of three laws each explaining the behavior of heat in certain materials. The basic thermodynamics variables are temperatures, heat and entropy. The three variables are the physical quantities that keep on changing from one material to another depending on the surrounding conditions around the material.

This paper explores the innovations in portal imaging to assert that the course of these advancements has been largely positive in assisting the attainment of the objectives of portal imaging. The paper employs the evidence provided by research and studies into the field to arrive at plausible conclusions, the effectiveness of procedures such as the implantation of radiopaque gold markers as an alternative practice in anatomical regions whose movement is not dependent upon bony landmarks is assessed, conclusions declare that the aforementioned procedure holds substantial credibility and is a correct method that can be utilized as an on-line strategy for image-guided radiation therapy (IGRT),

Only those of the aeolian (wind streaks and sand storms), cratering (erosion and degradation) and tectonic (in the Tharsis and Elysium regions) are seen at present. Another example of an ongoing process are the giant sand storms observable even on Earth that produce a yellowish-rust color on the entire Mars (Hsui 1).

The most prominent of them has of course been the view that science endorses, namely, the view based on cosmic science and biological evolution (Darlymple, 1994, p.1-20). The notion that earth is only a few thousand years old was a Bible-based assumption and was acceptable to the people of the pre-scientific era of human history (Darlymple, 1994, p.18-24).

The paper gives the information which was collected from scholarly articles and published books relevant to the subject. Wind is simply moving air or air in motion. In this research, the definition of wind is any amount of air moving in a definite direction or changing directions moving at speeds less than 5 miles an hour. Breezes and tornadoes are forms of moving air travelling at less than 2 kilometers an hour and more than 50 miles an hour respectively.

In Southern California, the general landscape is flat and hilly. According to geology studies, Southern California has suffered numerous earthquakes since it is located at the border line between two plates. In addition, Los Angeles is irregularly shaped; since, the landscape of the area is both flat and mountainous (McWilliams, 2009).

At the interface of two media that are not similar, a ray would bend, curve if in media that changes its refractive index, reflected or absorbed. Optical parameters determined the propagation of the rays in an optical system depending on the wavelength of the ray.

And thus, the glaciers, the ice caps and the ice sheets are melting, the climate is vigorously changing and the sea levels are rinsing. This of course becomes the cause of many of the natural disasters as well, like the tornadoes, floods, sandy storms, etc.

Charles Messier's Butterfly Cluster. Our galaxy contains nearly 400 billion stars including many comets, nebulas and star clusters. Star clusters, or Messier objects, are collections of many stars in our galaxy. In the past astronomers confused them with comets; however, Charles Messier (a French scientist) observed them very carefully throughout his life and discovered 15 comets along with 103 other celestial objects which were later named Messier objects.

The first aspect introduced is that of the relationship between GDP and interest rates. Changes in the interest rate have no direct impact on the GDP. Consequentially, the GDP remains stationary at its given level (GDP0 in the diagram below) for all levels of the interest rate.

With all this, however, it is important we learn to develop in a way that will not eventually destroy us or the environment we live in. Only about 150 years after discovering oil, we already may be running out of it according to some projections, which state that peak oil has already been reached, and even if we are not currently at peak oil, we are approaching it within the next few decades (Carlson).

The bone of contention is support and opposition to science. Mooney and Kirshenbaum have dealt with issues with far reaching consequences not only relating to the lifestyles but to that of survival of humankind. According to the authors, the individual who has the highest regard for science finds it difficult to come to its all-out defense.

Diffraction is defined as the phenomenon that occurs when a wave encounters an obstacle and bends around it, reaching places which would otherwise be in shadow. For waves of light with a wave length in the nanometer range 10-9m, obstacles that produce diffraction are thin slits, sharp edges and pointed objects.

In simple words, a high-class design is a procedure that requires understanding of systems design procedures and user properties, like users' substantial restrictions, characteristics and inspirations. Thus, user interfaces design should be developed with straightforward, unbiased and reliable screens.

Additionally, before the currently accepted theory of the formation of the moon came into existence, there were three other theories that quite evidently explained where, and how the moon cam e into existence. Initially, these theories were fission theory, capture theory and condensation theory respectively.

Semiconductors materials fall between the conductors and insulators and their conductivity affected by factors like light, temperatures, impurities and magnetic field. Covalent bond results when two atoms from different materials share their outermost electrons to achieve a stable balance.

The Lift force is created according to the hydrostatical theorem of the Archimedes principle. According to this principle, the aircraft will be buoyed up by a force equal to the weight of the air displaced by the aircraft.

Research Methodology 11 3.1 Rationale for a qualitative research 12 3.2 Research Method 13 3.3 Interview 13 3.4 classification of Interviews 14 3.5 Data Analysis 14 Respondants’ diversity 15 Response on Semi-Structured Interview 16 5. Project Management 17 References 19 1.

Few living souls are unaware of the Apollo missions that inspired a nation and physically took humanity to a universe unknown. Even as manned space flight has garnered the most public attention, no less important are the module controlled space missions. This essay examines one such mission, the Cassini-Huygens exploration of Saturn.

The rotor consists of permanent magnet, exciter output winding, six rectifier diodes and the output field winding all mounted on the generator shaft while the stator consists of 3-phase output windings mounted on the alternator housing. PMG supplies magnetic flux to enable the generator to produce current prior to flow of field current.

STUDENT NAME DATE COMPLETED/SUBMITTED [To Student: All your answers should be entered on this Answer Sheet. Submit this Answer Sheet to your Assignment Folder when completed.] Multiple Choice Section (Answer 26 Questions) Type in the letter that represents your best answer to the corresponding question from the original final exam document.

In keeping with this trend, the reader should understand that the Marianas Trench, the deepest point in all the world’s oceans, is no different. As such, the following analysis, although brief, will seek to detail the shoe trips that have been made to the bottom of the Marianas trench within the past 50 years; the first of these in 1960 and the second most recent by James Cameron.

Administration of Potassium Iodide as a radioprotector after nuclear accidents The only potential causes of large radioiodine emissions into the air are a disastrous accident within an operating nuclear reactor, and a detonation of nuclear weapons. In case of a nuclear event, detrimental and poisonous radioactive materials could be emitted into the environment.

Peer review meets this objective because an individual can easily identify an author’s mistakes that the author could. This paper offers peer review to Bottger’s article, ‘Peripheral nerve stimulation by MR gradient coils.’ The paper offers an overview of the article, and commendations, affirmations, and recommendations to the article.

More effort should be placed on preventing emissions emitted by the power grid. The renewable power that has been generated from turning the power grid green can be used to decarbonize transportation. Denmark generates about 21% of its power from wind energy and is currently considered to be the current world leader not only in the manufacture of wind turbines but also in wind power production.

The physics of sailing has many details, and the process of successfully sailing a vessel combines art, the experience of the sailor, and scientific principles. These details are founded on three distinctive elements of sailing i.e. the function of the keel, the shape and the configuration of the hull, and the function of the sails.

And this man is Nikola Tesla. Nikola Tesla (1856-1943) laid foundations of modern electrical engineering by his contribution into its theory and practice. My goal in this paper is to explore the theoretical significance of Tesla’s work as the basis for modern AC engineering and discuss things that contributed to his recognition as one of the most prominent scientists in the U.S.

One of these important functions includes the regulation of money supply in the country. This is dealt by the monetary policy of that particular country that has its limitations and demand serious attention from not only the policy makers but also the public who would have to follow these policies.

Although few would argue that these policy and legislative protections are a net bad for the environment or for conservationism, the ultimate underlying question then becomes to what extent these policy mechanisms and legislative actions actually provide a degree of real and measurable protection for the environment.

The concentration of dissolved salts in seawater that are inorganic in nature is known as salinity. Seawater derives its conductivity from the dissolved ions. The higher the concentration of dissolved ions in seawater, the higher will be its conductivity.

Turbofan is the most ubiquitous type of air-breathing engine and refers to a gas turbine engine that is designed to work for subsonic speeds. It is a unique type of internal combustion engine which does not have any reciprocating parts, such as the car engine.

Electromagnetism spectrum. Electromagnetic radiation (EMR) is one of the key phenomena of electromagnetism, which behaves as photon particles or propagating waves travelling through space loaded with radiant energy (Abdo 2007). These waves characteristically travels at a speed of light in vacuum and in a straight line (Abdo, 2007).

The Life and Works of Werner Heisenberg. Werner Karl Heisenberg was a German theoretical physicist who lived between 1901 and 1976. He is regarded as one of the greatest scientists of the twentieth century.1 He was one of the main authors of quantum mechanics – a branch of physics that is now being widely used by scientists, engineers, students, and educators all around the world for various applications.

Q2. The following are the ways in which the switching speed of the gradient coil system will be maximized while minimizing the interference with other components in an MR system. The design of the gradient coil system will consider minimizing the impendence of the coil system.

Receiver bandwidth is generally used to fasten the digitalisation of the MR signals. In this regard, the receiver bandwidth 1 can determine the frequency ranges that will eventually be sampled using the frequency encoding gradient. During the optimization through an increase of receiver bandwidth, the amount of time at the flat top of the gradient is significantly reduced.

Changes in Climate and Their Effects While considered with the previous years, last decade has witnessed increased temperatures globally. The last time such a considerable rise in temperatures was recorded was in 1850, although according to scientists, this is a bigger increase than that of 1850.

Because of these, patients who undergo MRI may suffer from high-level acoustic noise, heating and accidental projectiles. Emotional distress, anxiety and lack of immobility are thus very likely, especially among children. Since movement lessens the quality of MRI images, use of sedation or general anesthesia is warranted to increase tolerance to an unpleasant but necessary procedure, and to expedite MRI imaging of a distressed patient (Shellock, 2011; Medical Advisory Secretariat, 2003).

The technological advancement proved by the existence of Dolly represented major medical progress, a new method for curing illness. The event also caused great apprehension from those worried it may mean a future populated by human clones. The questions concerning human cloning have been a troubling topic of throughout all segments of society

The author states that the measurement of isotropic diffusion is also known as “free” such that the ADC fundamentally represents the coefficient of a molecular diffusion that is intrinsic. The scope of this observation is indicative of the presence of three barriers which are categorized as; permeable, non-permeable and partially permeable.

It is indeed true that the usage of fossil fuels offers many advantages (Borowitz, 2004). First and foremost the fossil fuels happen to be easily accessible. Fossil fuels are found in abundance on the planet earth and can readily be extracted and used to meet the human energy needs (Borowitz, 2004).

Man always wished to fly, after he made automobiles and ships. Several efforts were made since the early 1400’s to watch the skies closely. Ornithopters, Hot air balloons and Gliders have seen light in this process. In 1903 the Wright brothers came up with a flight model and since then the aircrafts have been undergoing many changes.

It deals with the desire of personal privacy that concern the transmission of data through the internet. It also involves the practice of presiding over the type and amount of information that is supposed to be unveiled about an individual on the internet and those who can have access to that information (Gina, 2011).

New Orleans is surrounded by the Gulf of Mexico, which maintains many different aquatic species that contribute to ecological diversity in the region. The city is also adjacent to the Mississippi River, which maintains regular outflow into the Gulf of Mexico.

In his famed article “That Mysterious Flow” Paul Davies claims people can only tell the passage of time using their senses. Since a person can only feel time slipping away, he or she is unable to give a tangible prove concerning its magnitude or direction similar to other dimensions, for instance, mass and distance.

Theory. Rolling motion involves that motions which combines translational and rotational motion of an object in respect to the surface. Whenever there is an ideal condition the two motions would be in contact with no sliding. In many cases, rolling is obtained by a speed of rotation at a point or line of contact that is normally equal to the speed of translation.