Energy Efficiency

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What is energy efficiency?

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Energy efficiency is the measure of how much useful energy is produced from a given amount of energy input, expressed as a percentage.

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What is a fossil fuel?

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Fossil fuels are natural substances formed from the remains of ancient plants and animals, which can be burned for energy. Examples include coal, oil, and natural gas.

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What is solar energy?

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Solar energy is energy harnessed from the sun's rays, which can be converted into electricity using solar panels.

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What is the energy efficiency of hydroelectric dams?

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The energy efficiency of hydroelectric dams is approximately 90%.

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What happens to energy during transformations?

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Energy can be lost as heat during transformations, which reduces the overall efficiency of the process.

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What is the formula for calculating efficiency?

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Efficiency = (Useful Energy Output / Total Energy Input) x 100%.

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What is the role of wind energy in energy efficiency?

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Wind energy is a renewable energy source that can be harnessed to generate electricity, contributing to energy efficiency by reducing reliance on fossil fuels.

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What is biomass?

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Biomass is organic material that comes from plants and animals, which can be used as a renewable energy source.

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What is geothermal energy?

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Geothermal energy is heat energy generated and stored in the Earth, which can be used for heating and electricity generation.

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What is the difference between renewable and non-renewable energy sources?

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Renewable energy sources can be replenished naturally (e.g., solar, wind), while non-renewable sources (e.g., fossil fuels) are finite and will deplete over time.