Latent heat is a science term used to describe the amount of energy that has been absorbed or released when a substance goes through the process of changing states. | Latent Heat of Fusion - heat absorbed by a unit mass of a solid at its melting point in order to convert the solid into a liquid at the same temperature The heat absorbed as a substance changes phase from liquid to solid‚ a process called fusion or solidification. For water‚ Latent Heat of Solidification - heat liberated
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Chapter 5 "Energy Resources" Formal Assessment Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. The process of burning a fuel to change chemical energy into thermal energy is called a. heat. b. electricity. c. energy. d. combustion. ____ 2. The three major fossil fuels are coal‚ oil‚ and a. wood. b. natural gas. c. uranium. d. electricity. ____ 3. Fossil fuels are considered nonrenewable resources because they
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a star How does gravity‚ nuclear fusion and mass affect the life cycle of a different sized stars? * Stars initially form from clouds of dust and gas. The force of gravity makes the gas and dust spiral in together to form a protostar. Gravitational energy has converted into heat energy‚ so the temperature rises * When the temperature gets high enough‚ hydrogen nucli undergo thermonuclear fusion to form helium nuclei and give out massive amounts of heat and light. A star is born. It immediately
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HEAT 4.1 UNDERSTANDING THERMAL EQUILIBRIUM 1. Define: The measure of the degree of hotness of an object. (a) Temperature Measured in SI unit Kelvin‚ K A hot object is at a higher temperature than a cold object. Form of energy‚ measured in Joules‚ J (b) Heat Heat is transferred from hotter object (higher temperature) to colder object (lower temperature) When an object is heated‚ it will absorb heat energy and the temperature will increase. When an object is cooled‚ it will release heat energy and
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process in which you increase the percentage of a certain isotope in a substance‚ such as Uranium-235 from 0.7% to 4% in a natural uranium ore. 8.4.4: Energy Transfers: - Water is heated by heat energy created through nuclear fission - Energy is lost to surroundings - Steam turns a turbine (heat energy transformed into kinetic energy) - Energy is lost to friction - Turbine powers a generator - Energy is lost to friction - Energy is transformed into electrical energy 8.4.5: Role
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change in temperature of H2O as it changes phases from ice to water to gas? Hypothesis If the time which H2O stays on the hot plate increases‚ then the temperature of H2O will increase and the phases from ice to water to gas will change because the heat is a source of energy to change the physical states. Background Ice is a solid form of H2O and water is a liquid form of H2O. The gas form of H2O is water vapor. A solid has a definite volume and shape. It is not compressible and it can’t flow. A
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CHAPTER 27&29 INTRODUCTION TO WELDING & FUSION WELDING PROCESS Dr. Tasnim Firdaus Ariff Welding Fundamentals Overview of Welding Technology 2. The Weld Joint 3. Features of a Fusion Welded Joint 1. 2 Joining and Assembly Distinguished Joining - welding‚ brazing‚ soldering‚ and adhesive bonding These processes form a permanent joint between parts Assembly - mechanical methods (usually) of fastening parts together Some of these methods allow for easy disassembly‚ while others do not 3 Welding
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that protects workers and the area around it from potentially dangerous radiation. The walls of the structure are metres thick of concrete to absorb the radiation. -Reactor: The reactor is the most important part of the process as it produces heat which forms steam to power the turbines therefore creating electricity. It uses uranium-235 or in some cases plutonium-239. -Control rods: Control rods are the component which makes nuclear fission stable and safe. They are placed in-between the
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Theory: To most people heat and temperature are generally the same thing. But really in a scientific sense there is still a similarity between them but they are different concepts. Temperature is the measure of the average energy of molecular motion in a substance. Heat is the total energy of molecular motion in a substance. Temperature is not energy like heat is‚ it is just measure of it. Now there is also a difference between heat and thermal energy. Heat is an energy that is transferred
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may have indeed called very big sticks. Nuclear weapons work by releasing the enormous amounts of energy that are contained in the bonds of atoms. The bonds of atoms can be broken in two ways. The first way is by fission‚ and the second way is by fusion. Fission works by the splitting of atoms with neutrons. To start the reaction‚ though‚ an initial kick of energy is needed. This energy kick usually comes from a conventional explosive (Kroenig‚ “Nuclear Weapon”). Fission weapons work by inducing
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