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
slavikrds [6]
3 years ago
8

A Carnot engine operates with an efficiency of 26.0% when the temperature of its cold reservoir is 281 K. Assuming that the temp

erature of the hot reservoir remains the same, what must be the temperature of the cold reservoir in order to increase the efficiency to 35.0%?
Physics
1 answer:
VLD [36.1K]3 years ago
4 0

Answer:

The temperature of cold reservoir should be 246.818 K for efficiency of 35%

Explanation:

In first case we have given efficiency of Carnot engine = 26 % = 0.26

Temperature of cold reservoir T_L=281K

We know that efficiency of Carnot engine is given by

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

0.26 =1-\frac{281}{T_H}

T_H=379.72K

For second Carnot engine efficiency is given as 35% = 0.35

And temperature of hot reservoir is same so T_H=379.72K

So 0.35=1-\frac{T_L}{379.72}

T_L=246.818K

So the temperature of cold reservoir should be 246.818 K for efficiency of 35%

You might be interested in
An object is moving in a straight line at a constant speed. A resultant force begins to act upon the object. State the ways in w
sergiy2304 [10]

Answer:

accelerate / increase speed OR decelerate / decrease speed OR stop B1

change direction / move in a curve o.w.t.t.e

Explanation:

accelerate / increase speed OR decelerate / decrease speed OR stop B1

change direction / move in a curve o.w.t.t.e

8 0
3 years ago
The windowpanes are___________ a. opaque b. transparent c. absorbent .
kogti [31]

Answer:

The windowpanes are- transparent.

The color of the panes are due to the wavelengths of light that the glass- allows to pass through

Explanation:

Just answered the question.

4 0
3 years ago
Read 2 more answers
Matter is made of small particles to small to be seen. Which of these best describe evidence of this statement? 1. Tara’s crayon
son4ous [18]

Answer:

Explanation:

I think the answer is statement no 3.

Hope it helps.

5 0
2 years ago
Read 2 more answers
Two people are sitting on playground swings. One is pulled back 4 degrees from the vertical and the other is pulled back 8 degre
lara [203]

Answer:

They will come back at the same time.

Explanation:

The angular velocity equation of ω= \frac{V}{r} where ω is the frequency of the movement, dependent on the angle. But since swings are simple pendulums and their angles of 8 and 4 degrees are small, they will come back to their starting points at the same time.

I hope this answer helps.

4 0
3 years ago
Read 2 more answers
The half of the moon facing the sun is always lit, but the different phases happen
Marizza181 [45]

Answer:

the answer is the spinning of the moon lets us see different amounts of light

Explanation:

you wanna know why uh yes ok lets cut to the magic so when the moon.

3 0
3 years ago
Other questions:
  • An object is dropped on Earth from a height of 15 m. How long did it take for the object to reach the ground?
    13·1 answer
  • The vertical displacement of the wave is measured from the ?
    15·1 answer
  • The buildup of charges on an object is called
    10·2 answers
  • In a later chapter we will be able to show, under certain assumptions, that the velocity v(t) of a falling raindrop at time t is
    6·1 answer
  • Please Someone Help me I Need Help ASAP PLEASE
    10·1 answer
  • How are energy and distance up the ramp related
    15·1 answer
  • How do electromagnetic waves travel through a vacuum?​
    5·1 answer
  • Need an actual answer, no links.
    6·1 answer
  • 2 QUESTIONS!! PLEASE HELP QUICK
    9·1 answer
  • You walk 6 meters east followed by 4 meters west in 4 seconds. What is your velocity
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!