Energy Transfers 1
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The document discusses different types of energy transfers and the law of conservation of energy. It provides examples of energy transfers, such as a candle transferring chemical energy into heat and light energy. It also discusses the main energy transfers that occur for objects like a car engine (chemical to kinetic and heat) and radio (electrical to sound and heat). The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another, so the total energy input equals the total energy output during a transfer.
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3) Electrical energy is caused by the movement of electrons and is easily transported through power lines to convert to other forms like mechanical energy from a fan.
4) Chemical energy is stored in chemical bonds and released in chemical reactions like burning matches.
5) Thermal energy is the heat and motion of atoms in hot or cool objects.
0708 types of_energy
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2) Electromagnetic energy includes light from different wavelengths such as visible light, microwaves, and radio waves. It is the energy that cooks food in a microwave.
3) Electrical energy is caused by the movement of electrons and is easily transported through power lines to convert to other forms like mechanical energy from a fan.
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5) Thermal energy is the heat and motion of atoms in hot or cool objects.
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Energy 5Alan Wrafter Thermal energy can be transferred between substances in three ways: conduction, convection, and radiation. Conduction involves the transfer of kinetic energy between particles in solids and liquids when one end is heated. The specific heat capacity of a substance determines how much energy is required to raise its temperature by one degree. Heat always flows from areas of higher temperature to lower temperature until temperatures equalize.
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2) When a basketball bounces after a tennis ball drops on it, the basketball transfers some kinetic energy to the tennis ball but is not slowed much due to its greater mass.
3) A dropped basketball does not bounce as high when a tennis ball is dropped on it first, as the tennis ball does not have enough momentum to transfer significant energy back to the basketball.
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Energy 2Alan Wrafter The document discusses different types of energy transfers and the law of conservation of energy. It provides examples of energy transfers, such as a candle transferring chemical energy into heat and light energy. It also discusses the main energy transfers that occur for objects like a car engine (chemical to kinetic and heat) and radio (electrical to sound and heat). The law of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another, so the total energy input equals the total energy output during a transfer.
Energy 1
Energy 1Alan Wrafter Energy is the ability to do work. A car and a person both get their energy from sources. The types of work they do are transportation for the car and various physical activities for the person. An activity ordering task involves ranking common activities and objects by the amount of energy they use or store, from smallest to largest. The standard unit for measuring energy is the joule, with 1 kilojoule equaling 1000 joules. There are 9 main forms of energy: heat, light, sound, electrical, kinetic, elastic potential, gravitational potential, nuclear, and chemical.
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Energy 6
Energy 6Alan Wrafter The document discusses the three main methods of heat transfer:
1. Thermal conduction, which is the transfer of heat through direct contact of particles in solids.
2. Thermal convection, which is the movement of heat by the circulation of fluids like liquids and gases caused by differences in density due to temperature variations.
3. Radiation, which is the transmission of heat energy through electromagnetic waves that can travel through a vacuum.
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Heat transfer & ConductionAlan Wrafter Thermal energy can be transferred between substances in three ways: conduction, convection, and radiation. Conduction involves the transfer of kinetic energy between particles in solids and liquids when one end is heated. The rate of heat transfer by conduction depends on the temperature difference and the material's specific heat capacity, which is the amount of energy needed to change its temperature. Heat always flows naturally from hotter to cooler substances until thermal equilibrium is reached.
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Thermal Energy & Heat TransferAlan Wrafter Thermal energy, also called heat energy, is the transfer of energy between objects due to a temperature difference. Temperature is measured in degrees Celsius and indicates how hot an object is, while heat is measured in Joules and refers to the quantity of thermal energy transferred. The specific heat capacity of a substance is the amount of heat energy required to raise its temperature by one degree and one kilogram, and can be used to calculate the energy needed to change an object's temperature. Heat naturally transfers from hotter to cooler objects until they reach thermal equilibrium.
Energy Transfers 1
- 2. Match each of these to the type of energy that it containsA mug of coffeeKinetic energyA piece of coalElastic energyA coiled springChemical energyA moving bicycleHeat energy
- 4. Example:
- 8. Chemicalenergyheatenergy + light energyEnergytransfersWhat are theenergytransfersfor a TV?lightsoundelectricalheat
- 9. EnergytransfersWhat are the main energy transfers for a car engine? kineticsoundchemicalheat
- 10. EnergytransfersWhat are the main energy transfers for a radio? soundheatelectrical
- 11. Energytransfers
- 12. A hair dryer changes __________ energy to __________ energy, ________ energy and ______ energyThe Sun changes __________ energy to ________ energy and _______ energy.When a catapult is released it changes ________ energy to ______________ ___________ energy and __________ energy.
- 13. Conservation of energyWhat happens to the total energy of a system before and after and energy transfer? It remains the same but exists in different forms“Energy cannot be created or destroyed. It can only be changed from one form to another.”
- 14. The amount of electrical energy which is inputted equals the total amount of energy outputted lightsoundelectricalheat
- 15. The law of conservation of energyEnergy can be transferred in more than one form at a time.The INPUT energy will always equal the total OUTPUT energy.“Energy cannot be created or destroyed. It can only be changed from one form to another.”
- 16. Kinetic energy58%(Useful spinning of the drill bit)Energy Transfer ValuesElectrical energy100%Kinetic energy22%(Wasted vibration of the drill)Heat energy20%(wasted)