![subject](/tpl/images/cats/fizika.png)
Physics, 21.01.2020 18:31 zeckwielen8205
Aheat engine is designed to do work. this is possible only if certain relationships between the heats and temperatures at the input and output hold true. which of the following sets of statements must apply for the heat engine to do work?
a) qh < qc and th < tc
b) qh > qc and th < tc
c) qh < qc and th > tc
d) qh > qc and th > tc
part b
find the work w done by the "ideal" heat engine.
express w in terms of qh and qc
w=
part c
the thermal efficiency e of a heat engine is defined as follows: e = w/qh
express the efficiency in terms of qh and qc.
e=
![ansver](/tpl/images/cats/User.png)
Answers: 3
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 00:30
Order the sequence of ideas that lead to marie curies discovery of radioactive elements number the events in chronological order starting with the oldest
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 14:30
Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 20:00
What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 20:30
Suppose a force of 60 n is required to stretch and hold a spring 0.1 m from its equilibrium position. a. assuming the spring obeys hooke's law, find the spring constant k. b. how much work is required to compress the spring 0.5 m from its equilibrium position? c. how much work is required to stretch the spring 0.6 m from its equilibrium position? d. how much additional work is required to stretch the spring 0.1 m if it has already been stretched 0.1 m from its equilibrium? a. kequals 600
Answers: 2
You know the right answer?
Aheat engine is designed to do work. this is possible only if certain relationships between the heat...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 24.03.2021 19:10
![question](/tpl/images/cats/mat.png)
Mathematics, 24.03.2021 19:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 24.03.2021 19:10
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 24.03.2021 19:10
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
History, 24.03.2021 19:10
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 24.03.2021 19:10
![question](/tpl/images/cats/mat.png)
Mathematics, 24.03.2021 19:10
![question](/tpl/images/cats/biologiya.png)
Biology, 24.03.2021 19:10
![question](/tpl/images/cats/mat.png)
Mathematics, 24.03.2021 19:10
![question](/tpl/images/cats/obshestvoznanie.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 24.03.2021 19:10
![question](/tpl/images/cats/mat.png)
Mathematics, 24.03.2021 19:10