different liquids in the Newton’s Law of Cooling equation‚ in order to determine when it was safe to store food products in commercial restaurant after cooking. The high risk temperature for bacteria growth is between 5 and 60 degrees. However putting hot food into your fridge before this point can cause food poisoning especially in deep containers‚ which is why it is vital that food companies and chiefs are aware of how longer a food‚ takes to cool down from an approximate temperature. Obviously an exact
Premium Temperature Heat Thermodynamics
The Environmental Lapse Rate Exercise A (Total = 12 marks) The heights of the temperature °c measurements are given in meters (m) Convert each of these to the appropriate height in Hectopascals (hPa): Height (m) Temperature°c Hectopacals (hPa) 0 22 1000 1500 18 850 3000 13 700 4000 7 600 5000 -15 500 6000 -22 400 7000 -36 300 8000 -41 200 8500 -49 150 9000 -58 100 a) Plot a simple graph to display these data (3 marks): see attached b) what does the graph tell you about
Premium Dew point Atmospheric thermodynamics Water vapor
Reaction Rate Abstract Enzymes are affected by changes in pH. The most favorable pH value— the point where the enzyme is most active—is known as the optimum pH. This experiment was conducted to determine the effect of pH reaction rate on an enzyme‚ catalase‚ from yeast. The experimental results indicate that the catalase worked best at a neutral pH level of seven (7). Introduction An enzyme is a protein molecule that serves as a catalyst. “The basic function of an enzyme is to increase the rate
Premium Enzyme Chemical reaction Catalysis
Reaction Rate Coursework Aim To see how the concentration of a reactant affects the rate of reaction‚ in this case sodium thiosulphate and acid. Scientific Background For a reaction to occur‚ the particles of the reactants must be colliding with each other with enough energy‚ the amount of energy needed for the reaction is called activation energy. Activation energy is altered by temperature‚ concentration‚ surface area of and the pressure on the reactants. Stirring the reactants also increases
Premium Chemical reaction Chemistry Sodium
“Why is there an Increase in Number of Out-of-School Youth in Dasmariñas‚ Cavite?” Sociology with Family Planning CHAPTER I The Problem and its Environment “Education is the key to success.” Nobody can deny the hard fact that education is an extremely important for bringing change in the lives of individual but not all of us were given a chance to attend a formal school. It has universally been recognized as the most powerful instrument for gearing up the socio-economic development of the
Premium High school Primary school Primary education
Biology coursework How does the temperature affect the rate of reaction? Introduction For our experiments‚ I was investigating what affects the rate of reaction. We used Hydrogen peroxide to test the rate of reaction‚ with the temperature of this being our variable that we changed. Hydrogen peroxide is a clear‚ colourless liquid which has various amounts of uses within the laboratory‚ industrial purposes and even in our households. It is mainly used for cleaning products and hair dye but is
Premium Oxygen Enzyme Hydrogen peroxide
America’s Divorce Rates: Why Are They So High? The sanctity of marriage is a tradition that has been entered by generations over the past thousands of years. In the United States alone‚ 2‚200‚000 people choose to enter the lifetime commitment of marriage every year. Yet‚ less than half of that population is expected to keep that commitment. In a 1999 Rutgers University study‚ it is said that only 38 percent of Americans consider themselves happy in their married state‚ which has decreased from
Premium Divorce Family Family law
Shay Orial English 112 10am Professor Kate Belknap February 24‚ 2013 Cigarette Smoke Stinks Growing up many of my family members were smokers. I remember the horrible smell that stuck to their breath‚ clothes‚ and lingered around their house. It has been roughly eight years since I have smelled that nasty stench and I would like to continue to not smell these harmful fumes while here at Colorado Mesa University. In 2006‚ Colorado’s Clean Indoor Air Act was passed‚ limiting smoking in numerous
Premium
What must I know? 1. Explain the challenges of and responses to declining birth rate • Responses: Explain how Singapore’s population policies change from the 1970s to the 21st century to meet the changing needs of society and nation. Questions a. How far do you agree that the main [most important] reason for promoting population growth from the 1980s [topic] was an ageing population [given factor]? Explain your answer. [12] (N‚ 2008) – Challenges I agree to a certain
Premium Old age Population Middle age
INTRODUCTION An exchange rate is the price at which one country’s currency must pay in order to buy one unit of another county’s currency on the foreign exchange market. The concept of exchange rate mechanism may be explained as the technique employed by the governments in order to manage and control their respective currencies in the context of the other major currencies of the world. There are 5 exchange rate mechanisms established which each of it is meant to be followed by government regarding
Premium Foreign exchange market Central bank Monetary policy