Chemical Kinetics Factors Affecting Reaction Rate OVERVIEW Chemical reactions occur at different rates. In this experiment you will consider some of the key factors that influence the rate of a reaction: nature of reactants - particle size temperature concentration catalysts According to the collision theory‚ the rate of a reaction depends on the frequency of collisions between reacting particles. The more frequent the collisions‚ the faster the rate of the reaction. However‚ in order for the
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Labor rate variance is the difference between the actual labor rate and the applied overhead rate (standard rate multiplied by the number of actual hours worked). Consider this and respond to the following: • "Our workers are all under labor contracts. Therefore‚ our labor rate variance is bound to be zero." Do you agree or disagree that the labor rate variance will be zero if all workers are under labor contracts? Explain giving reasons. The concept of labor rate variance and its application
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Free exchange Savers’ lament The complex effects of low interest rates on consumption and investment Dec 1st 2012 | from The Economist print edition WHEN interest rates hit double digits in the late 1970s‚ house-builders sent planks of wood to the Federal Reserve in protest. With rates stuck near zero‚ the protests now come from the opposite direction. The retired complain of a “war on savings”. The Fed cut rates to current levels at the end of 2008 and has promised to keep them there until
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can be potentially more important for the next generation than it is for us. The issue is birth rate or population‚ what it is now and what it will be in the future. First of all‚ what is birth rate? The birth rate is the total number of births per 1000 of a population in a year. As you may know‚ by subtracting the death rate from the birth rate we will result in the rate of population. Here is a display of the birth rate from 1950 to 2015. Year Birth rate 19501955 37.2 19551960 35.3 19601965 34.9
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unemployment rate was not bad. Obama has brought us into greater debt but has helped reduced the unemployment rate drastically. Thanks to this there is less crime in America. If we want to be a strong committed country there should be no one without a job. The unemployment rate before Obama in 2000 was 4.2 and once Obama came to officer the unemployment rate is 7.9. Obama must reduce the unemployment rate. Unemployment only makes the countries debt go up‚ and more people turn to crime because they
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Posture | Time (Minutes) | Pulse Rate(Beats/30 seconds) | Pulse Rate x2(Beats/minute) | Lying Down | 1 | 24 | 48 | Standing Up | 1 | 30 | 60 | Pulse Rate after 15 seconds of exercise (Beats/15 seconds) | Pulse Rate x6 in order to measure beats/minute(Beats/minute) | 11 | 66 | 3. Record how long this takes in seconds. - 38 seconds 4. Calculate the increase in the pulse rate immediately after the 15 seconds exercise compared with your standing rate. 66-60= 6. 6 pulses increased
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statement concerning risk premium? A. The greater the volatility of returns‚ the greater the risk premium. B. The lower the volatility of returns‚ the greater the risk premium. C. The lower the average rate of return‚ the greater the risk premium. D. The risk premium is not correlated to the average rate of return. 5. You bought 100 shares of stock at $20 each. At the end of the year‚ you received a total of $400 in dividends‚ and your stock was worth $2‚500 total. What was your total return
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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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Heart rate investigation Research statement: To investigate‚ how diabetes affect a person’s heart rate during physical exercise. Background information: Heart rate : Heart rate is the number of time a persons heartbeats per unit of time‚ usually measured in BPM (beats per minute). Heart rate is measured by finding the pulse on body‚ usually taken from carotid artery‚ which supplies blood to the head and the neck and radial artery‚ which Is located on your wrist below your thumb
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Effects of Raising Interest Rates If a central bank increases the base rate‚ this tends to increase all major interest rates in the economy. This means interest rates for both savers and borrowers will increase. Higher interest rates will have various economic effects: 1. Increases the cost of borrowing. Interest payments on credit cards and loans will be more expensive. Therefore this discourages people from borrowing and saving. People who already have loans will have less disposable income
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