Diffusion is one of several transport phenomena that occur in nature. A distinguishing feature of diffusion is that it results in mixing or mass transport‚ without requiring bulk motion. Thus‚ diffusion should not be confused with convection‚ or advections‚ which are other transport mechanisms that utilize bulk motion to move particles from one place to another. In Latin‚ "diffundere" means "to spread out". There are two ways to introduce the notion of diffusion: either a phenomenological approach
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MECHANICAL ADVANTAGE CIRCUITS SERIES CIRCUITS Ratio of resistance and effort forces Work = Force * Distance IMA= effort distance resistance distance AMA = resistance force effort force If MA > 1: Less effort force; greater effort distance If MA < 1: Greater effort force; less effort distance Moment = Force * Distance Static Equilibrium: Effort Moment = Resistance Moment Torque: A force that produces or tends to produce rotation or torsion. SIMPLE MACHINES Series
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Vermont. Narrative conventions such as symbols‚ novel structure‚ point of view‚ setting and tone were used to develop the two main themes in the novel which were an individual against the society and abuse of power by the government. These narrative convections also affect the reader’s response
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What is a light year‚ how is it used to measure distances in space‚ and why is this unit measurement necessary? What is an astronomical unit‚ how is it used to measure distances in space‚ and why is this unit measurement necessary? How fast can our fastest spacecraft travel? What are the limitations of manned space missions with respect to exploring the universe‚ the galaxy‚ the solar system‚ and other planets? What are the major components of the universe? How do scientists think
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Chapter 8: The Sun & The Universe: Secrets of the Sun The sun is classified as a yellow dwarf‚ because of both its color and size. The sun is the only star in our solar system‚ and all of the planets revolve around it. The mass of the sun is equal to about one million earths. It can cause solar storms that interrupt much of our technology and means of communication. The amount of radiation that can reach Earth during a solar storm is particularly easy to reach on the north and south poles.
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the atmospheric conditions that created it. What improvements were made to weather prediction due to this event? What economic impact did this event have? In 2012 Hurricane Sandy began as a low pressure system which developed sufficient organized convection to be classified as a tropical depression. In the immediate term‚ three factors have come together to make Hurricane Sandy what it is: A huge storm with winds gusting up to 90 mph (145 kph) set to make landfall somewhere on the East Coast Monday
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1. What is Earth’s mantle? The mantle is a part of a terrestrial planet or other rocky body large enough to have differentiation by density. The interior of the Earth‚ similar to the other terrestrial planets‚ is chemically divided into layers. The mantle is a layer between the crust and the outer core. ... 2. What elements make up the Earth’s mantle? Magnesium‚ silicon‚ iron and oxygen‚ aluminum‚ silicon‚ calcium‚ sodium and potassium 3. Describe the “big splash” theory of the Moon’s origin? The
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and the upper part of the mantle. What lies beneath the tectonic plates? • Below the lithosphere (which makes up the tectonic plates) is the asthenosphere. Plate Movement • “Plates” of lithosphere are moved around by the underlying hot mantle convection cells Practical Exercise 1 Supercontinents! What happens at tectonic plate boundaries? Three types of plate boundary • Divergent • Convergent • Transform Divergent Boundaries • Spreading ridges – As plates move apart new material is erupted
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Answer: Erect scaffold Connect drain / blinding Drop burners Swing elbows for decoking if required Blinding for opening Open manway Provide ventilation / lighting / scaffolding Obtain entry permit Cover the burners Clean radiation / convection section Offer for inspection Repair / refractory replacement Install burners Remove ventilation / lights / scaffolding Box up Swing elbows / deblind Remove external scaffold / clean area 4. Briefly outline the maintenance procedure for
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environments. He related the subjects in response to the variables‚ which influence the condition of thermal comfort. Fanger’s model is based upon an energy analysis that takes into account all the modes of energy loss (L) from the body‚ including: the convection and radiant heat loss from the outer surface of the clothing‚ the heat loss by water vapour diffusion through the skin‚ the heat loss by evaporation of sweat from the skin surface‚ the latent and dry respiration heat loss and the heat transfer from
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