convection and radiation. Conduction is when heat travels through solids. Hot atoms vibrate and their energy is passed on to neighbouring atoms which vibrate and become hot. Convection is the process by which heat is transferred by warm liquids or gases. Warm air is less dense than cold air because particles have more energy so they spread further. So the hot air rises and transfers heat and the cold air replaces it Radiation: all objects give out and take in thermal radiation which is also called
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Ideas about the solar system Our understanding of the solar system has changed over many centuries. Scientists such as Ptolemy‚ Copernicus and Galileo added their ideas to our changing understanding. We observe the universe using a variety of equipment‚ from telescopes to orbiters and landers. Models of the solar system The planets and the Sun orbit the Earth in Ptolemy’s model. Our understanding of the universe has changed over time. Different civilisations have created different models to
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Introduction (5:03) 1. What is the name for all the electromagnetic waves that exist? Names of the electromagnetic waves that exist are Gamma Rays‚ X-Rays‚ Ultraviolet Waves‚ Visible Light‚ Microwaves‚ and Radio Waves. 2. What are electromagnetic waves produced from? What two things do they have? Electromagnetic waves are produced by the vibration of charged particles and have electrical and magnetic properties. 3. What is the name for the section of the electromagnetic spectrum that
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might think that if the black hole absorbs all kinds of radiation‚ it might possible not emit any too. But Stephen Hawking did a good piece of thinking on that concept and came up with the idea of the popular Hawking Radiation. He came up with this idea when his fellow student Jacob Bekenstein suggested that a Black hole should have a finite non-zero temperature and entropy and Black holes must emit some kind of radiation‚ Hawking radiation states that ’Close to the event horizon of a black hole
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Microstrip Antenna using different feed techniques and study the effect of antenna dimensions Length (L)‚ Width (W) and substrate parameters relative Dielectric constant (εr)‚ substrate thickness on Radiation parameters of Band width. Low dielectric constant substrates are generally preferred for maximum radiation. The conducting patch can take any shape but rectangular and circular configurations are the most commonly used configuration. Other configurations are complex to analyze and require heavy numerical
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situation for an agriculture based country like india. We hope these findings throw some light on the grave situation and let people think about the alternates. Electromagnetic waves or radiation [pic] The electromagnetic waves that compose electromagnetic radiation can be imagined as a self-propagating transverse oscillating wave of electric and magnetic fields. This diagram shows a plane linearly polarized EMR wave propagating from left to right. The electric field is
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Newton’s Laws of Motion and Gravity Define mass‚ weight‚ force‚ and acceleration. Mass – A measure of the total amount of material in a body‚ defined either by the inertial properties of the body or by its gravitational influence on other bodies. It is proportional to‚ but not the same as‚ its mass Force – A quantitative description of the interaction between two physical bodies‚ such as an object and its environment. Force is proportional to acceleration. Acceleration – A vector quantity that
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something about the wavelengths that make up a particular type of radiation (i.e.‚ the spectrum of radiation)‚ one could use an object such as simple diffraction parallel-slit grating in the form of a spectrometer. For example‚ molecules‚ atoms‚ and nuclei typically radiate or scatter radiation that corresponds to discrete frequencies and hence discrete wavelengths‚ λ. Knowing the spectrum (the intensity and wavelengths) of these radiations can tell us a lot about the molecule‚ atom‚ and nucleus under
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Electromagnetic radiation (EM radiation or EMR) is a form of radiant energy‚ propagating through space via photon wave particles. In a vacuum‚ it propagates at a characteristic speed‚ the speed of light‚ normally in straight lines. EMR is emitted and absorbed by charged particles. As an electromagnetic wave‚ it has both electric and magnetic field components‚ which oscillate in a fixed relationship to one another‚ perpendicular to each other and perpendicular to the direction of energy and wave propagation
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Sample Project Paper Analyzing Business Processes for an Enterprise System By A Paper Presented in Partial Fulfillment Of the Requirements of MBA 520 Managing with Technology June 2012 Presented to: Professor Marwan Stambuli This manufacturer of chemicals will soon find‚ if it hasn’t already‚ that the processes and
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