Question about Thermodynamics: Thermal Machines
Subject Physics
Physics
Source Originais Teachy
Originais Teachy
Topic Thermodynamics: Thermal Machines
Thermodynamics: Thermal Machines
Difficulty Medium
Medium
(Originais Teachy 2023) - Question Medium of Physics
In a city, a thermoelectric power plant operates with a thermal machine that uses water in the form of steam to convert thermal energy into mechanical energy and, subsequently, into electrical energy. Suppose that the steam entering the turbine of the power plant is at 420°C and 25 MPa, while at the exit the pressure drops to 0.1 MPa and the thermal efficiency of the machine is 40%. Considering a quantity of 1000 kg/s of water vapor circulating in the cycle and using the saturated steam table for analysis, calculate the power generated by the power plant.a.
520 MW
b.
580 MW
c.
410 MW
d.
350 MW
e.
470 MW
Answer sheet:
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur id consequat justo. Cras pellentesque urna ante, eget gravida quam pretium ut. Praesent aliquam nibh faucibus ligula placerat, eget pulvinar velit gravida. Nam sollicitudin pretium elit a feugiat. Vestibulum pharetra, sem quis tempor volutpat, magna diam tincidunt enim, in ullamcorper tellus nibh vitae turpis. In egestas convallis ultrices. Sed non sem ultricies, sollicitudin sem facilisis, commodo justo. Maecenas mattis sodales nunc, et auctor massa fermentum a. Maecenas eget nisl felis.
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Curabitur id consequat justo. Cras pellentesque urna ante, eget gravida quam pretium ut. Praesent aliquam nibh faucibus ligula placerat, eget pulvinar velit gravida. Nam sollicitudin pretium elit a feugiat. Vestibulum pharetra, sem quis tempor volutpat, magna diam tincidunt enim, in ullamcorper tellus nibh vitae turpis. In egestas convallis ultrices.
Answer sheet
You need to be a registered teacher to view the answer sheet
IARA TIP
Are you putting together a test or exercise list?
On Teachy’s platform, you can automatically generate these materials without spending hours searching for questions 😉
Those who viewed this question also liked...
Question
Question
Difficulty Medium
Source:
CEFET-PI
The dimensions of the basic primitive quantities are: length [L], mass [M], and time [T]. The dimensions of the derived quantities Force and Pressure are, in this order, equal to:
Dimensional Analysis
Difficulty Medium
Question
Question
Difficulty Medium
Source:
Teachy
Explain the difference between the mass and weight of an object. How does gravity act on these quantities? And how can this influence the movement of an object on Earth? Give an example.
Gravitation: Gravitation Problems
Difficulty Medium
Question
Question
Difficulty Very Easy
Source:
Teachy
An airplane initially flies north at a speed of 200 km/h. Due to a wind blowing from east to west, the airplane ends up deviating to the northeast, following a trajectory that forms a 45-degree angle with the north direction and covering a distance of 300 km from the starting point. Determine, using vector concepts, the speed of the airplane relative to the ground, considering the effect of the wind. Consider that the wind speed is constant and equal to 50 km/h, and that the wind direction is perpendicular to the initial direction of the airplane.
Vectors: Addition
Difficulty Very Easy
Question
Question
Difficulty Medium
Source:
FCMCSP
The godwits (Limosa lapponica) are migratory birds that fly from Alaska to New Zealand in about 10 days, covering a distance of 12000 km. The average speed of the godwits in this displacement is
Kinematics: Average Scalar Speed
Difficulty Medium
Join a community of teachers directly on WhatsApp
Connect with other teachers, receive and share materials, tips, training, and much more!
We reinvent teachers' lives with artificial intelligence
2023 - All rights reserved