IB Thermal Physics MCQ questions ( Higher) 1. Thermal energy is transferred through the glass windows of a house mainly by A. conduction. B. radiation. C. conduction and convection. D. radiation and convection. 2. The first law of thermodynamics may be expressed in terms of the quantities below. DU‚ the increase in the internal energy of the system Q‚ the energy transferred to the system by heating W‚ the work done on the system Which one of the following is a correct statement
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ENERGY RESERVES OF MACROMOLECULES SUMMARY This experiment was conducted in order to show the energy received from the food that humans eat on a daily basis. The energy that is required by the human body to perform chemical reactions is obtained from the chemical bonds that formed between the atoms in the molecules. To calculate the amount energy‚ types of food products were burned underneath a test-tube filled with water. The temperature rise gave an estimate of the energy released per gram.
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TMA 01 – Question 3 In this question I will identify the main contributions to the energy balance at the Earths surface and then state the conditions to which the GMST is in a steady state and would rise. Solar radiation‚ infrared radiation‚ atmospheric radiation‚ convection and latent heat are all energies that contribute to the balance of the Earth’s surface. This
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The Refrigeration Process Refrigeration has probably been around longer than you think. In 1823‚ Michael Faraday discovered that certain gases under constant pressure will condense when they cool. In 1875‚ Raoul Picet used sulfur dioxide as a refrigerant and in 1931 Refrigerant R-12 was developed by Thomas Midgley and C. F. Kettering. The Kelvinator refrigeration unit‚ ice cream units‚ and Semi-hermetic compressors were introduced at the beginning of the 20th century. In this
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to do such and they have a much higher energy because of it. I also found that surface tension is measured in forces per unit length and stated in newton’s per meter but it can also be measured as joules per square meter if it is in the use of thermodynamics where it is expressed as work done per unit of area where it is stored as potential energy which is the energy that a piece of matter has because of its position or because of its arrangement of parts. Water molecules that are at the surface
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Sample SOP - Mechanical Engineering STATEMENT OF PURPOSE FOR MECHANICAL ENGINEERING Keeping in view that my undergraduate course would be completed in a few months‚ I am at the crucial stage wherein I have to decide what I would be doing to improve my career. I have a great compulsion towards practical industrial work environment and therefore I wish to pursue graduation study. Also‚ the sweeping changes in Global Industrialization and Design Engineering have made the role of mechanical
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Joseph Corey‚ Chris‚ Grant Thermodynamics – Enthalpy of Reaction and Hess’s Law I. Purpose The purpose of this lab is to verify Hess’s Law through the three reactions of NaOH and HCl‚ NH4Cl and NaOH‚ and NH3 and HCl. The sum of the enthalpies of the first two reactions should equal the enthalpy of the third reaction. II. Background Hess’s Law is used to determine the enthalpy of a reaction from adding two or more preceding reactions. To determine the enthalpies of certain
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all liquids. At some point‚ as the temperature is increased‚ the liquid begins to boil. This happens when the vapor pressure of the liquid equals the applied pressure (for an apparatus that is open to the atmosphere the applied pressure equals atmospheric pressure (1 atm = 760 mm Hg)). For cyclohexane‚ this occurs at 81° C. The boiling point (BP) of cyclohexane therefore equals 81° C. The definition of the boiling point of a liquid in an open container then is the
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determine the fixed point on a thermometer. The fixed points are freezing point (32oF/0oC) and boiling point (212oF/100oC). Upper fixed point is the temperature of pure water boiling at normal atmospheric pressure. Lower fixed point is the temperature of a mixture of pure ice and pure water at normal atmospheric pressure. Generally the upper and lower fixed points of a thermometer are determined with considering the freezing point and boiling point of water. In Celsius thermometer‚ lower fixed point
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THERMAL PHYSICS LABORATORY: INVESTIGATION OF ADIABATIC PROCESSES IN AIR This experiment has two parts. In the first‚ you will use a dynamic method to measure the ratio of the specific heat capacities of air and‚ in the second‚ you will investigate the behaviour of gas undergoing an expansion that is approximately adiabatic and ‘partially reversible’ – somewhere between the two limits of a completely irreversible (free) and perfectly reversible expansion. The air can be considered an ideal gas
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