An intensive property is a bulk property‚ meaning that it is a physical property of a system that does not depend on the system size or the amount of material in the system. Examples of intensive properties are the temperature and the hardness of an object. No matter how small a diamond is cut‚ it maintains its intrinsic hardness. By contrast‚ an extensive property is one that is additive for independent‚ noninteracting subsystems.[1] The property is proportional to the amount of material in the
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The importance of water in Biological Systems Much of the Earths surface is comprised of water‚ as well as much of biological systems; for instance‚ the human body consists of approximately 70% of water‚ and in other biological organisms this figure could even be 95%. This largely relies on the bonding of water‚ whereby two hydrogen atoms bond to one oxygen atom; hydrogen bonding is the strongest intermolecular force due to its high polarity. Hence‚ what is the biological importance of water?
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Hoo Sze Yen Form 4 Experiments Physics SPM 2008 CHAPTER 1: INTRODUCTION TO PHYSICS 1.1 PENDULUM Hypothesis: The longer the length of a simple pendulum‚ the longer the period of oscillation. Aim of the experiment: To investigate how the period of a simple pendulum varies with its length. Variables: Manipulated: The length of the pendulum‚ l Responding: The period of the pendulum‚ T Constant: The mass of the pendulum bob‚ gravitational acceleration Apparatus/Materials: Pendulum bob‚ length
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water plays a part in this. One method of reducing internal body heat is sweating; sweat is mostly made up of water. The structure of the water molecule means that it has very high melting and boiling points for a molecule of its nature because of the strong attraction between them. This means that a large amount of energy is needed before the molecules begin to move about and therefore change state. It is because of this high latent heat of vaporisation that water is an effective coolant; energy from
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Numerical Analysis of Auto-ignition of Ethanol Vaibhav Kumar Sahu1‚ Shrikrishna Deshpande1‚ Vasudevan Raghavan1‚* 1Department of Mechanical Engineering Indian Institute of Technology Madras‚ Chennai 600036‚ INDIA. Received 28 June 2011; accepted 5 August 2011‚ available online 24 August 2011 1. Introduction Ethanol is the most effective bio-fuel. Its easier production from agricultural feed-stocks‚ sugar cane and Fischer-Tropsch method makes it dominant among other bio-derived
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Science Chemistry Controlled Assessment- Part 3 Analysis and Evaluation 1) Process the data you have collected and plot a graph(s) of the results of your expected results Please refer to the graph attached to the document for the answer to this question. 2) Describe any patterns or trends in your results. Comment on any unexpected results. Due to the positive correlation that my graph shows‚ I can infer that the more mass of CaCl2 added then the higher the energy release. Through further calculations
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Page 12 1 a) Between t = 30 and t = 45 mins b) 7.5 mins c) i) distance travelled = area under graph between t = 0 and t = 12½ mins ii) average speed = total distance travelled total time for journey = total area under graph 60 mins 2 a) ∆v = 32 m/s a =10 m/s² t = ∆v = 32 = 3.2 s a 10 b) 3 a) OP – constant acceleration PQ – constant acceleration (greater than OP) QR – constant speed RS – constant deceleration b) O and S c) 6 m/s d) 70 s e) Total distance travelled = area under
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Experiment to determine absolute zero using Charles’s law In this experiment you will be determining the specific heat capacity of oil using an electrical method. You will need to ensure that your write up contains the following: • Clear method (bullet points are ok) and labelled diagram include what is to be repeated and averaged. • State independent/dependent and control variable(s) • State what is to be varied and how (include range and intervals)? • What is to be measured and what with
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Title: To investigative the Energy Content of Different Foods. Identifying the problem: The energy content of a food sample‚ of known mass‚ was investigated by using a single calorimeter and the word equation below: Heat energy (J) = Mass (g) x Specific heat capacity of water (4.25/g°C for water) x Change in temperature (°C). Dividing the resulting energy value by grams of food burned gives the energy content (in J/g). I predict that that the Brazil nuts will have the highest energy
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6. Applications * Is it possible to add heat to a body without changing its temperature? Yes. It is possible to add energy to a body (in the form of heat) and not raise its temperature by causing a phase change. When you heat ice it takes energy to convert it from ice to water‚ but does not change the temperature of the body until it is all converted. The principle behind this is what we call latent heat. It refers to the energy (or heat) required to change the state of a substance without changing
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