Energy Conservation and Transfer

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What is the law of conservation of energy?
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Energy cannot be created or destroyed, only transformed or transferred.
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What is energy transfer?
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Energy transfer is the process of energy moving from one place or object to another.
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Give an example of energy transfer in everyday life.
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When you eat food, chemical energy is transferred into kinetic energy for movement.
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What happens to energy lost in a system?
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It is often converted into thermal energy or sound energy.
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How does friction affect energy transfer?
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Friction converts kinetic energy into thermal energy, slowing objects down.
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What is an energy transformation?
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An energy transformation is the process of changing energy from one form to another.
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Give an example of energy transformation.
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In a toaster, electrical energy is transformed into thermal energy to toast bread.
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What is work in terms of energy?
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Work is done when energy is transferred to an object causing it to move.
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How is heat transferred between objects?
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Heat can be transferred through conduction, convection, and radiation.
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What is conduction?
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Conduction is the transfer of heat through direct contact between materials.
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What is convection?
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Convection is the heat transfer through fluid movements like in liquids or gases.
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What is radiation in terms of energy transfer?
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Radiation is the transfer of energy by electromagnetic waves, such as sunlight.
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Why do insulators reduce energy transfer?
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Insulators have low thermal conductivity, preventing heat from passing through easily.
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How does a heat engine perform work?
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A heat engine converts thermal energy into mechanical work.
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What is a real-life example of radiation?
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The sun warming the Earth's surface.
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