Question detail
A machine has an efficiency of 0.85. What is its efficiency expressed as a percentage?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Conservation and dissipation of energy
Question
A machine has an efficiency of 0.85. What is its efficiency expressed as a percentage?
Answer
The efficiency expressed as a percentage is 85%.
Explanation
This question tests the student's ability to convert a decimal efficiency value into a percentage. The conversion is done by multiplying the decimal by 100, which is a fundamental skill in understanding efficiency.
Common mistake
Confusing Efficiency Formats
Students often confuse decimal and percentage formats for efficiency, mistakenly stating a decimal value as a percentage.
To fix this, remember to multiply the decimal efficiency by 100 to convert it to a percentage.
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