Practice - Efficiency: The Ratio of Useful Output to Total Input
Practice Questions
Test your understanding with targeted questions
Define efficiency in your own words.
💡 Hint: Think about how effectively something performs its job.
What is waste energy?
💡 Hint: Consider what happens to energy that isn't used efficiently.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does efficiency measure?
💡 Hint: Think about how we define efficiency.
True or False: All machines can be 100% efficient.
💡 Hint: Consider the implications of friction and heat.
1 more question available
Challenge Problems
Push your limits with advanced challenges
A factory uses 1,500 kJ of energy and produces 550 kJ of useful work. Calculate its efficiency and discuss ways to improve it.
💡 Hint: Think about energy losses in machinery.
Analyze the impact of improving the efficiency of a vehicle that currently operates at 20% efficiency to 40%. How would this affect fuel costs and emissions?
💡 Hint: Consider the relationship between fuel consumption and emissions.
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Reference links
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