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
abruzzese [7]
3 years ago
5

The ocean thermal energy conversion project uses the surface water near tropical islands with a temperature of 20°C as the hot t

emperature reservoir, and the water at some depth, with a temperature of 5.0°C, as the cold temperature reservoir for a heat engine. What is the maximum possible efficiency of an engine running between those two temperatures?

Physics
1 answer:
choli [55]3 years ago
3 0

Answer:

\eta=0.0512\ or\ 5.12\%

Explanation:

Heat engine is device operating in a continuous cycle between two reservoirs such that it transfers heat from a high temperature reservoir to a low temperature reservoir giving some work output in synchronization to Kelvin-Plank statement of the second law of thermodynamics.

<u>Given that:</u>

  • temperature of higher temperature reservoir, T_H=20+273=293\ K
  • temperature of lower temperature reservoir, T_L=5+273=278\ K

<u>For maximum efficiency:</u>

\eta=1-\frac{T_L}{T_H}

were:

T_H\ \&\ T_L are the temperatures of higher temperature reservoir and lower temperature reservoir respectively.

\eta=1-\frac{278}{293}

\eta=0.0512\ or\ 5.12\%

You might be interested in
The main source of this energy is <br> .
USPshnik [31]

Answer:motion

Explanation:

kinetic energy of an object that it possess due to its motion.

5 0
1 year ago
Read 2 more answers
An engine takes in 200 J of heat, expels 40 J of heat, and does 160 J of work. What is the efficiency of the engine?
Reil [10]
The answer would be C. 80%
Put 160 over 200 and find the GCF
160/200÷40=4/5=80%

4 0
3 years ago
The angular velocity of a process control motor is (13−12t2) rad/s, where t is in seconds. Part A At what time does the motor re
mihalych1998 [28]

Answer:

Explanation:

Given

\omega =13-\frac{1}{2}\cdot t^2

Motor reverse its direction when \omega =0

13-0.5t^2=0

26=t^2

t=\sqrt{26}=5.099\approx 5.1 s

(b)

\frac{\mathrm{d} \theta }{\mathrm{d} t}=\omega

\int d\theta =\int_{0}^{5.1}\omega dt

\int d\theta =\int_{0}^{t}(13-.05t^2)dt

\theta =(13t-0.1667\times t^3)_0^{5.1}

\theta =44.192^{\circ}

4 0
2 years ago
How many molecules are indicated by writing 2 H2O? <br><br> A.) 2<br> B.) 3<br> C.) 4<br> D.) 1
Thepotemich [5.8K]
A, 2 molcules
H2O is one molecule, it has 3 atoms (two hydrogen and one oxygen)
2 H2O are two water molecules
7 0
3 years ago
Read 2 more answers
Momentum of 0.5 kg moving ball with the velocity of 5 m / s ​
ankoles [38]

Answer:

2.5

Explanation:

Momentum = Mass × Velocity

3 0
2 years ago
Read 2 more answers
Other questions:
  • What is the<br> snowboarder’s kinetic energy<br> when her speed is 5 m/s?
    10·2 answers
  • The gravitational force between two objects:
    10·2 answers
  • How do animals affect the amount of carbon in earth’s atmosphere
    13·1 answer
  • If your front lawn is 18.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1050 new snowflakes every minu
    12·1 answer
  • 2. Calculate the slope of the line in your graph of the square of the period of the pendulum vs. length of the string .Galileo f
    15·1 answer
  • A negative charged particle of known magnitude q is placed in a uniform electric field of known strength E. What additional info
    11·1 answer
  • 1. Calculate the force of gravity in newtons if your weight is 110 lbs?
    5·2 answers
  • Technician A says that the radiator should always be inspected for leaks and proper flow before installing a rebuilt engine. Tec
    11·1 answer
  • Diagram of water waves moving from a shallow water to deep water​
    9·1 answer
  • Example of a balanced force
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!