Ion is e
Element is a
Compound is f
Sorry that’s all I know
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False U should always be safe when driving a car. Pay attention at all times. Never text or use cell phone or put make up on
The efficiency of the device is 30 %
Explanation:
The efficiency of a heat engine is given by:
where
W is the work done by the engine
is the heat in input to the engine
For the device in this problem, we have:
W = 120 J is the work done
is the heat in input
Substituting, we find the efficiency:
which corresponds to an efficiency of 30%.
Learn more about work:
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