What is the efficiency of a device that takes in 400 J of heat and does 120 J
2 answers:
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:
#LearnwithBrainly
You might be interested in
Answer:
b is called the power of base 10.
Explanation:
In the scientific notation form
the exponent b is called the power of the base 10.