1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mestny [16]
4 years ago
12

What is the maximum efficiency of a heat engine whose operating temperatures are 590 ?c and 325 ?c?

Physics
1 answer:
mina [271]4 years ago
7 0
 <span>The maximum possible efficiency, i.e the efficiency of a Carnot engine , is give by the ratio of the absolute temperatures of hot and cold reservoir. 
η_max = 1 - (T_c/T_h) 

For this engine: 
η_max = 1 - [ (20 +273)K/(600 + 273)K ] = 0.66 = 66% 

The actual efficiency of the engine is 30%, i.e. 
η = 0.3 ∙ 0.664 = 0.20 = 20 % 

On the other hand thermal efficiency is defined as the ratio of work done to the amount of heat absorbed from hot reservoir: 
η = W/Q_h 

So the heat required from hot reservoir is: 
Q_h = W/η = 1000J / 0.20 = 5000J</span>
You might be interested in
Around what year can Carbon-14 dating be used up to and why?
Fofino [41]
Idk<span>Around what year can Carbon-14 dating be used up to and why?</span>
7 0
3 years ago
Why does the Moon seem to change shape?
Licemer1 [7]

Answer:

A

Explanation:

3 0
3 years ago
Read 2 more answers
A baseball goes from zero to 38 m/s in 0.157 s. what is its average acceleration? answer in units of m/s 2 .
Likurg_2 [28]
Since acceleration is measured in whole seconds, you need to know how many times 0.157seconds goes into 1 second... (just divide 1 by 0.157) = 6.369

So if in 0.157seconds the baseball went from zero to 38m/s, then to find out how fast it would be traveling after one whole second just multiply 38m/s by 6.369

38m/s x 6.369 = 242.038 m/s^2
3 0
3 years ago
Choose the law each sentence describes. This law relates a planet's orbital period and its average distance to the Sun. The orbi
hram777 [196]

These are the Kepler's laws of planetary motion.

This law relates a planet's orbital period and its average distance to the Sun. - Third law of Kepler.

The orbits of planets are ellipses with the Sun at one focus. - First law of Kepler.

The speed of a planet varies, such that a planet sweeps out an equal area in equal time frames. - Second law of Kepler.

7 0
3 years ago
Read 2 more answers
1. How do energy and matter recycle in a closed-loop system?
Makovka662 [10]

Answer:

In a closed-loop system, matter is used to generate energy, and the energy generated is used to produce matter, and the cycle goes on without end.

Explanation:

A closed-loop system is one in which materials or energy is recycled without end through a production cycle. This means that a raw material is used to produce a finished product, and the finished product at the end of its use cycle is converted back and used as a raw material to produce more of it again. Energy and matter can also be cycled in the same way in an energy and matter closed-loop system, converting matter to energy, and the energy is put back into the production of more of the matter.

7 0
3 years ago
Other questions:
  • I'm thinking A or D?<br> Does anyone know the correct answer and why?
    11·1 answer
  • A nurse pushes a cart by exerting a force on the handle at a downward angle of 36 degrees below the horizontal. the loaded cart
    10·1 answer
  • What volume of .2500 m cobalt iii chloride is required to react completely with 25 ml of .0315 m calcium hydroxide?
    13·1 answer
  • A ball is dropped off a 20.5 meter rooftop. What will the velocity of the ball just before it hits the ground?
    5·1 answer
  • 150,624 in short word form
    8·1 answer
  • Match the descriptions of motion in the first column to the displacement versus time graphs in the second column.
    7·1 answer
  • Which of the following statements describe sliding friction? Select all that apply.
    10·2 answers
  • A man pushes a boulder with a mass of 50kg from rest to a final velocity of 3
    10·1 answer
  • Help me please it’s urgent
    5·2 answers
  • What would happen if you went through a black hole. I will give brainliest for a correct answer.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!