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Answer :
To calculate the energy efficiency of the kettle, we need to divide the amount of energy used to heat the water by the total energy input into the kettle. For example, if it takes 1 kWh of electricity to heat the water and the kettle uses 1.2 kWh of electricity, the energy efficiency is 83.3%.
The kettle is not 100% efficient because some energy is lost as heat to the surrounding environment. This can be due to several factors such as poor insulation, heat transfer through the kettle walls, or energy lost in the steam released during boiling. The missing energy is dissipated into the environment as waste heat, which is why it is important to use energy-efficient appliances to reduce energy waste and save money on utility bills. Investing in a well-insulated kettle or using a lower heat setting can also help to improve energy efficiency and reduce energy waste.
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