Many students require some free physics help as this science is a complex one. Not many people have a call to this subject. That is why the majority of students cannot gain high GPA. Physics  explains the world around us. Studentshare team offers physics help for free in the shape of numerous essays, research papers, case studies, and more. By downloading our study materials you receive a free physics homework help. Get ready for any assignments you may face with excellent physics articles, essays, case studies, and research papers shared by the cleverest English-speaking students. Physics homework solutions are all here in one place.
Greenhouse Effect and Global Warming
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Our atmosphere makes life on earth possible. It is a complex natural system that provides a multitude of benefits (Critchfield, 1983). One of these benefits is referred to as The Greenhouse Effect. As solar radiation enters the atmosphere much of it is immediately reradiated out into space by cloud cover.
FOSSIL FUEL REPLACEMENT
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They are mainly used for industrial and for domestic purposes. These sources of energy are, however, non-renewable and are limited in supply; this is because they take too long to form. Furthermore, once their deposits are depleted they cannot replenish. According to the U.S.
A history of ultrasound physics and the properties of the transducer
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Transducers act as both a transmitter and a receiver of ultrasound and are capable of producing beams that are in turn directed in a variety of ways of improving the quality of the images that are seen on the screen. The main component of the transducer is made from a special piezoelectric material, which implies that they are capable of converting one form of energy to another; for instance, electrical energy can be converted to mechanical energy and vice-versa.
Global Warming: Causes, Effects and the Future
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Many environmental activists have provided how the global warming is going to affect the environment, as they have all come to the same conclusion about the fact that the global warming is really going to affect the earthly environment, where the extent of its harmfulness will keep increasing with due respect of time.
Decarbonizing Electricity
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In turn, these turbines generate electricity which can be commercially viable depending on the velocity of the winds. Harnessing of this wind power sometimes is a challenge because winds are not constantly flowing and therefore at such times there is bound to be overloads and power surges.
Paleo-discharge of the Maumee floods
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The focus for this investigation is around five locations presented as cross sectional areas. The site descriptions for the areas provide physical views and logical dimensions as viewed on maps and on the ground. The calculations of the measurements provided are a representation for the estimates that is used in solving the problem.
The Solar System and Moon Landing
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The study tells that the world is changing, and new things keep coming up. The same applies to the scientific knowledge and understanding that constantly keeps changing. Historical events and scientific discoveries are capable of changing people’s understanding of the natural world and scientific concepts.
Visit to California Science Center
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As the picture indicates, the wind tunnel was itself a magnificent piece of scientific work that caught our eyes and we spent a lot of time experiencing its functioning and understanding scientific theories behind it.
Rocket Science
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For over four decades, NASA has undertaken a number of successful human space flight programs. The role of NASA and ways it could implement to achieve its goals was redefined by President Barak Obama. Some of the current NASA plans for the manned space flight program include Tier One, this aircraft is the newest project, and the in-house name of this program was known as Tier One.
Current flow in a circuit (purely resistive and restive-capacitive
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The current may cause effects such as heating or even induce magnetic fields preferably used for generators, motors and inductors. Current generally flows from the positive terminal towards the negative terminal of battery and there is voltage drop across the electrical elements in the circuit due to resistance, reactance or inductance.
Final Exams
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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.
Investigating the physics of basketball
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It examines how equations related to these principles can be used to improve the game of basketball or make decisions. Projectile motion equations can be used to determine optimal angle at which the ball can be thrown in order to score. Moment of force and stability can be used to calculate critical angle at which if a player tilt past, he or she falls.
Space Exploration
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COVER STORY During the heat of the space race in the 1960s, NASA decided it needed a ballpoint pen to write in the zero gravity confines of its space capsules. After considerable research and development, the Astronaut Pen was developed at a cost of approximately $1 million US dollars.
Alternative Fuels for Automobiles
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We have been utilizing petrol and diesel over a span of century and now the time has come that we switch on to another alternative fuels in an effort to save the living standard of the people of the 21st century. According to (Wald)“One of the nation’s biggest energy problems is that nearly all of its ground transportation fuel is derived from oil”.
Fast-food Restaurant and Reasons for Obesity
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Most of the people relate obesity with the fast food restaurants. However, it can be claimed that fast food restaurants are not the sole reason behind obesity. There are deeper causes of obesity that need to be explored.
Formation of Solar Systems
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This paragraph will explain about the formation of planets. Sun has already formed but remaining gas and dust is still there in the form of disk. Sun will start heating the dust and gas cluster. The source of heat is at center and disk will be hottest nearer to the center.
Global Warming: Truth or Hype?
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An agreement was reached in the Kyoto Protocol in 1997 although little has been implemented to date. The most eminent preventive measure is the enhancement of public awareness on the eco-friendly technologies and attitudes necessary in curtailing the probable sources of global warming.
comparative essay on old earth and young earth
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Firstly, a rational man is known to believe that the universe had a beginning. Secondly, galaxies appear to be moving away from us at a speed which is proportional to their distance. This observation goes hand in hand with the expansion of the universe and suggests that the universe was once compacted (Delsemme, 1998).
NASA Mission
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General outline of the Kepler mission The Kepler mission aims at exploring the Milky Way galaxy for discovery of other planets in the space that are equal to or smaller than the earth and orbits stars. The mission also seeks to discover proportions of stars that may have such planets orbiting around them.
Geologic Time (Billions of Years vs. Thousands of Years)
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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).
Explain and Evaluate Psychodynamic and Humanistic Approaches
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Ethical concerns of these approaches, their pros and cons will be discussed in detail. Psychodynamic approach in psychology: theoretical assumptions Sigmund Freud is the founder of psychoanalysis and psychoanalytic theory and is often referred to as the founder of the modern psychology.
RC circuit lab report
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The amount of charge increases steadily until the maximum amount of charge designed for the capacitor to store is reached. At this point (when an optimum charge has been achieved), the capacitor ceases to charge despite the increase in the voltage of the current flowing across the loop.
alternative energy ((wind power))
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At the present level, the renewable sources of energy account for only 13% of the total energy requirements of the world. (Harvey, 2011) In this category, the major sources are
Laboratory Report of an experiment on Optical Fibre Transmission
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The results of changing the varying the frequency of the output signal, the independent variable, on the values of the input signal is shown in forms of waves of various frequencies and wavelengths. This project shows the use of normal visible light as input signal and
you wil examne your daily routine and determine the CO2 that you generate as a result
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Problem starts when the human activities begin emitting more carbon dioxide than it can be absorbed by our flora. The everyday activities of human such as consuming electricity, transportation, building and deforestation emits
Wind energy: Wind turbines in United States
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The US is the largest consumer of energy in the world, majority of which comes from oil and natural gas. The impact of fossil fuels on the environment has made the country to advocate for cleaner sources
SCANNING ELECTRON MICROSCOPY
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The SE image appears more three dimensional than the BSE image. The cluster of fibers at the center in the SE image appears more rounded, while the one in the BSE appears flat. The contours and topography of the SE image are clearly visible, while the BSE image looks flatter and plane.
Electron Microscopy
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Images in TEM are obtained by focusing an electron beam on the specimen. The electrons are absorbed, transmitted, scattered or backscattered. Depending on the kind of image required by the operator, either the transmitted electrons (called direct beam) or the scattered electrons (called diffracted beam) is selected.
Magnetisation Behaviour of Transition Metals and Ferrites
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Within this dissertation, an examinatio of ferro-, ferri-, and paramagnetic fields and how they all behave distinctly and how the level of magnetism of an object can be measured using a superconducting quantum interfering device (SQUID), the Magnetic Optical Kerr Effect (MOKE), or a Vibrating Sample Magnetometer (VSM) will be examined.
Correlation of the light scattering properties of transparent conducting oxides to PV efficiency
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For sample 238, the transmission is directly proportion to the wavelength of the projected light. As the wavelength increases, the percentage transmission increases but a rapid increase in the percentage transmission can be seen by the projection of light from wave length of 455nm to 627nm.
Year 2012: Fact or Fiction?
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The Mayan prophecy states that many devastating events will occur in December 2012 at a certain time that will lead to the destruction of the earth. On one hand, the astronomical knowledge of this ancient meso-american civilization is known to be far ahead of their times.
Electromagnetism and Mind Control
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Electromagnetic waves comprise of an amalgamation of oscillating electrical and magnetic fields, perpendicular to each other. This is complicated to visualize, however, the waveform has similar distinctiveness of other types of waves (Evans 34).The creation and detection of the wave and its impact on the mind depend on the range of wavelengths.
The Impact of Fruit Juices on the Dental Erosion in Human Tooth Enamel
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The changing lifestyle pattern of human beings which incorporates consumption of acidic substances like soft drinks and fruit juices has been a major contributor for the development and progression of dental erosion. Immense research in this field has strongly indicated a definite connection between the role of fruit juices and soft drinks and the development of dental erosion.
The international space station. Major Components.
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The US launched its first satellite Explorer I in 1958, soon after the Soviet Sputnik in 1957. This was the start of space race. The race is in the Cold War era when both nations strived for supremacy in every field. The period was a set of high tension incidents without direct military action.
Factors affecting quality of MRI image.Benefits of circular or square spiral EPI methods.
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Accurate image reconstruction depends on resonance frequency (rf) of a spin, which is achieved by strong homogenous external field and superposition of a spatially linear gradient. If these conditions are not met, then the relative positions of anatomical structures will be misrepresented in the reconstructed MRI image.
Modelling of optical parameters for optimum collection of concentrated solar radiation for photovoltaic devices
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Innovative ideas have come out to save the earth from destruction of its ozone layer. World population is expected to increase by about 10 billion by year 2050 and if electricity demands are not programmed by now, there will surely be insurmountable problems for the people and the deterioration of the environment will exacerbate.
Theoretical review in optical materials used in Concentrating Photovoltanic (CPV) Technology
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Theoretical Review of Optical Materials used in Concentrating Photovoltaic (CPV) Technology. Solar cells produce electrical current in direct proportion to the amount of solar radiation falling on them. By increasing the intensity of solar radiation, it is possible to significantly increase the efficiency of electricity production by these cells.
Echo Planar Imaging, or EPI, Fast Imaging Techniques (MRI)
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EPI is a fast, flexible imaging method, with good contrast and resolution, and with many potential applications in clinical imaging, such as functional MRI and rapid entire brain imaging. Though, EPI can be very unforgiving and requires careful parameter selection (Weishaupt, Koechli and Marincek, 2008).
Investigation and previous work on optical and thermal measurements in transparent materials
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Therefore, this chapter details previous studies on the optical and thermal analysis of optical materials. The basics of ray tracing, optical features and thermal analysis are described first, followed by a discussion on previous investigations on optical, thermal and physical properties of glasses and polymeric materials such as polymethyl methacrylate (PMMA).
Echo Planar Imaging, or EPI, Fast Imaging Techniques (MRI)
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Introduction Magnetic susceptibility refers to the process y issue tissue affects magnetic field. The existing boundaries between fat and compact bone are normally affected by the transverse magnetic field de-phasing and signal distortion. The consequent of the above is that frequency positions in the wrong location in the phase direction.
The Second Law of Thermodynamics.
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In the second law of thermodynamics, when complex systems undergo a certain change, then the system will either maintain their current order or decrease their order. This means that a change in a system cannot increase the order of the system. This principle can be well applied in our day to day life.
Magnetic Geophysical Method.
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The magnetic geophysical method is a scientific approach that is used to measure variations or anomalies that are localized and small in the magnetic field of the earth. Materials found on the surface of the earth such as the basic igneous rocks, and the ore magnetic bodies are helpful when it comes to the identification of the magnetic variations because they have the magnetic properties.
Range of semiconductor devices and circuits
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If the positive side of the ohmmeter is connected to the P-material and the negative side to the N-material the diode will be forward biased and due to this the voltmeter will at an appropriate scale will indicate some resistance. When the two ohmmeter leads are reversed the diode will be reverse biased and this indicates whether a diode is good or bad.
Global pattern of earthquakes and seismic energy distributions
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In this regard, it is agreeable that the studies that oriented on studying the impacts of the amounts of energy that are produced by the seismic events are also pertinent. A large number of studies, which have inclined on complete logs analysis that contain all sizes of events, have created the allowance for the analyses pertaining to the number of events, denoted as N, as well associated energy, which is often denoted as E.
Evidence for (or against) water on Mars
8 pages (2008 words)
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Evidence for (or against) water on Mars. The issue of presence of water on mars has been a challenging question for many astronomers since 1877. “In the 1800s, human imaginations ran wild as astronomers glimpsed what they took to be canals on the Martian surface.
Positron Annihilation.
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When a low energy positron collides with a low energy electron, there is an emittance of two gamma rays in the opposite direction. This phenomenon, also called positron annihilation, results in two gamma rays at 180° and with 0.511 MeV of energy moving in opposite directions.
Diffusion weighted (DW) Magnetic Resonance Imaging MRI
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Achievement of Different Diffusion Weightings 11 IV. Diffusion Information- Measurement 11 References 13 I. Introduction This paper discusses diffusion in general, and diffusion in the context of its use in magnetic resonance imaging or MRI. It discusses the use of diffusion in different MRI methods, with a focus on diffusion-weighted MRI.
did asteroids kill the dinosaurs?
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The extinction event that is most familiar today is the one which killed off the dinosaurs, and allowed mammals to take their current place as the dominant species type (York 2006). One of the most well-known theories for the cause of this extinction event is an asteroid hit, but there are several others, including global climate change, volcanic eruptions, communicable disease, and sex determination.
Alternating Current and Direct Current
8 pages (2008 words)
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This essay analyzes the two main specific types of current: alternative current and direct current. The direction of the current flow is altered or reversed in the case of alternative current. Direct current is a little different from alternative current because it flows in the same direction all the time and no alteration is done with it like in the case of alternative current.
Heat and temperature
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(Liboff, 1990) The addition of energy especially heat energy triggers particles to move faster while the removal of heat energy slows the particles down. Hence, if the state of heat energy of a system is known then the speed of its particles can be ascertained to a reasonable extent.
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