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
lys-0071 [83]
3 years ago
13

A heat engine has a maximum possible efficiency of 0.780. If it operates between a deep lake with a constant temperature of-24.8

°C, what is the temperature of the hot reservoir (in Kelvins)?
Physics
1 answer:
Volgvan3 years ago
8 0

Answer : The temperature of the hot reservoir (in Kelvins) is 1128.18 K

Explanation :

Efficiency of carnot heat engine : It is the ratio of work done by the system to the system to the amount of heat transferred to the system at the higher temperature.

Formula used for efficiency of the heat engine.

\eta =1-\frac{T_c}{T_h}

where,

\eta = efficiency = 0.780

T_h = Temperature of hot reservoir = ?

T_c = Temperature of cold reservoir = -24.8^oC=273+(-24.8)=248.2K

Now put all the given values in the above expression, we get:

\eta =1-\frac{T_c}{T_h}

0.780=1-\frac{248.2K}{T_h}

T_h=1128.18K

Therefore, the temperature of the hot reservoir (in Kelvins) is 1128.18 K

You might be interested in
A(n) ________ system is one in which energy moves freely in and out, but no matter enters or leaves the system.
3241004551 [841]
A CLOSED SYSTEM. In a closed system in which energy moves freely in and out, but no matter enters or leaves.
4 0
3 years ago
Read 2 more answers
WHICH SHOULD NOT BE PART OF SCIENTIFIC INQUIRY
umka21 [38]

Answer:

Not collecting the info

Explanation:

5 0
3 years ago
An automobile engine delivers 55.0 hp. How much time will it take for the engine to do 6.22 × 105 J of work? One horsepower is e
Gennadij [26K]

Answer:

15.2 s

Explanation:

Convert hp to W:

55.0 hp × 746 W/hp = 41,030 W

Power = energy / time

41030 W = 6.22×10⁵ J / t

t = 15.2 s

8 0
3 years ago
A long uniform board weighs 52.8 N (10.6 lbs) rests on a support at its mid point. Two children weighing 206.0 N (41.2 lbs) and
natima [27]

The upward force exerted on the board by the support is 530.8 N.

<h3>Upward force exerted on the board by the support</h3>

The sum of the upward forces is equal to sum of downward forces;

total downward forces = 52.8 N + 206 N + 272 N = 530.8 N

downward force = upward force = 530.8 N

Thus, the upward force exerted on the board by the support is 530.8 N.

Learn more about upward force here: brainly.com/question/6080367

#SPJ1

8 0
2 years ago
Which statement does NOT describe redesign?
pantera1 [17]
D. It happens all the time
4 0
2 years ago
Other questions:
  • When a 60-watt light bulb is connected to a 120-volt source the current in the light bulb is?
    15·1 answer
  • You walk with a velocity of 2 m/s north. You see a man approaching you, and from your frame of reference he has a speed of 3 m/s
    11·1 answer
  • If we decrease the amount of force applied to an object, and all other factors remain the same, the amount of work completed wil
    5·2 answers
  • HURRY!!
    6·2 answers
  • Label the parts of a concave lens.
    5·2 answers
  • Two identical small charged spheres are a certain distance apart, and each initially experiences an electrostatic force of magni
    5·1 answer
  • Chemical energy is a form of _____ energy.
    13·1 answer
  • What happens to friction if the velocity is constant? What will it equal to and what formula can be used to find it? Is it Fn =
    15·1 answer
  • Magnetic and electric fields lab report guide
    5·2 answers
  • Lamar writes several equations trying to better understand potential energy. What conclusion is best supported by lamar's worm?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!