Question
Efficiency is a comparison of how much
work goes INTO a machine versus how
much work COMES OUT of a machine.
How is efficiency expressed?
in kilograms
as a percentage (%)
work goes INTO a machine versus how
much work COMES OUT of a machine.
How is efficiency expressed?
in kilograms
as a percentage (%)
Ask by Dunn Macdonald. in the United States
Jan 23,2025
Upstudy AI Solution
Tutor-Verified Answer
Answer
Efficiency is expressed as a percentage (%).
Solution
Efficiency is typically expressed as a percentage (%). It quantifies how effectively a machine converts input work into output work. The formula for calculating efficiency is:
For example, if a machine uses 100 joules of input energy and produces 80 joules of useful output energy, its efficiency would be:
This means that 80% of the input energy is effectively converted into useful work, while the remaining 20% may be lost to factors like heat, friction, or sound.
Key Point: Efficiency is commonly expressed as a percentage to easily compare the performance of different machines or systems.
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Simplify this solution Beyond the Answer
Efficiency is expressed as a percentage, indicating the proportion of input work that is converted into useful output work. This percentage helps in understanding how effectively a machine uses its energy input; the closer this number is to 100%, the more efficient the machine is.
In practical terms, if a machine does 80 units of work while requiring 100 units of work to operate, its efficiency would be 80%. This type of metric is crucial for industries aiming to optimize performance and reduce energy costs, making it a key player in engineering and manufacturing!
