temperature of the reactants‚ the surface area of the reactants‚ the concentration of the reactants‚ and the presence of a catalyst. According to the collision theory‚ effective collisions between particles are needed in order for the reaction to take place (Neuss). By increasing the concentration of the solution‚ the number of effective collisions between the particles will also increase. This will produce more product (hydrogen gas). The concentration is the amount of substance contained within
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RATE OF REACTIONS. The reaction rate (rate of reaction) or speed of reaction for a reactant or product in a particular reaction is intuitively defined as how fast or slow a reaction takes place. For example‚ the oxidative rusting of iron under the atmosphere is a slow reaction that can take many years‚ but the combustion of cellulose in a fire is a reaction that takes place in fractions of a second (right). Chemical kinetics is the part of physical chemistry that studies reaction rates. The concepts
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Mid-term Examination review Name_________________________ Vocabulary Observation - is information collected through the five senses. Inference - an interpretation or explanation of an observation. Physical change - occur when objects undergo a change that does not change their chemical nature. Involves a change in physical properties Examples of physical properties include: texture‚ shape‚ size‚ color‚ odor‚ volume‚ mass‚ weight‚ and density Chemical Change - substances are changed chemically
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as the Fairplay 22 moves towards the Stena Britannia’s bow and where they added that the hydrodynamics grows as both vessel sail and as the distance between the ship decreases. According to MARIN if only Fairplay 22 stayed within Safety Zone the collision could have been avoided. According to the Vessel Traffic Service (VTS) manual a Safety Zone is the zone around the vessel which other vessel should remain clear unless authorised. Though the MARIN claimed that even in practice staying within the
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Agencies and Dept. of Transportation State and County Governments Automobile Industry Insurance Industry – Health‚ Auto Businesses in road safety Commuters Data - List of Variables Hour of accident - 0-24 hrs Alcohol Road alignment Manner of collision Traffic lanes - one /two/more Traffic conditions Road surface Population density Weekday Interstate Highway Relative to Roadway Work zone Relation to Junction Number of travel lanes Region - NE/MW/south/west Month Road surface conditions Traffic
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of the Aztec Empire (Today Mexico City). In South America‚ after years of preliminary exploration and military skirmishes‚ 168 Spanish soldiers under Francisco Pizarro and their native allies captured the Sapa Inca Atahualpa in the 1532 Battle of Cajamarca. It was the first step in a long campaign that took decades of fighting but ended in Spanish victory in 1572 and colonization of the region as the Viceroyalty of Peru. Spanish conquistadors imposed their technological superiority and benefited from
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THEORIES OF UNIMOLECULAR REACTION RATES 1. LINDEMANN / LINDEMANN-HINSHELWOOD THEORY This is the simplest theory of unimolecular reaction rates‚ and was the first to successfully explain the observed first-order kinetics of many unimolecular reactions. The proposed mechanism actually consists of a second-order bimolecular collisional activation step‚ followed by a rate-determining unimolecular step. k1 A + M Ë A* + M k-1 k2 A* → P Applying the steady-state approximation to the concentration of A*
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Concussions‚ Football‚ and Physics The NFL Playoffs‚ Steelers‚ Bengals. The running back Giovani Bernard receives the ball and looks up field‚ and finds himself staring at a linebacker Ryan Shazier. Shazier explodes onto him and knocks Bernard out cold. These jarring hits are common in the NFL‚ but most people don’t understand the consequences of them. Later on in life‚ football players that received head trauma experienced side effects later on‚ like CTE. CTE‚ or chronic traumatic encephalopathy
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resulting from traffic collisions and against liability that could also arise therefrom. The specific terms of vehicle insurance vary with legal regulations in each region. To a lesser degree vehicle insurance may additionally offer financial protection against theft of the vehicle and possibly damage to the vehicle‚ sustained from things other than traffic collisions. Vehicle insurance‚ in exchange for a premium‚ will pay valid claims arising out of traffic collisions such as the above. India
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Physics Coursework- Ohm’s Law Aim: To investigate the factors of affecting the resistance of a wire. In this experiment I will be using a metal nichrome wire to show the resistance when the length and width is changed. Variables Variables that I am going to keep the same. Variables that I am going to change. Width- 0.36mm2 Material- Nichrome wire Voltage- 2V Temperature- Room Temperature Length- 10cm‚ 20 cm‚ 30cm‚ 40cm‚ 50cm Material- Nichrome Length- 50cm Voltage- 2V Temperature- Room
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