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
Musya8 [376]
3 years ago
13

A Carnot machine operates with 25% efficiency, whose heat rejection reservoir temperature is 300K. Determine the temperature at

which the machine absorbs heat.
Engineering
1 answer:
alisha [4.7K]3 years ago
5 0

Answer:

The temperature at which observed heat is 400 K

Explanation:

Given data:

rejection reservoir temperature at exit T_{L} is 300 k

the efficiency of a engine is  η = 25%

we know that efficiency of Carnot is given as

\eta = (1-\frac{T_{L}}{T_{H}})*100

Putting all value to obtained  temperature at which observed heat

0.25 = (1-\frac{300}{T_{H}})

T_{H} = 400 K

You might be interested in
A highway reconstruction project is being undertaken to reduce crash rates. The reconstruction involves a major realignment of t
CaHeK987 [17]

Answer:

The provided length of the vertical curve is satisfactory for the reconstruction design speed of 60 mi/h

Explanation:

The explanation is shown on the first uploaded image

8 0
3 years ago
A number 12 copper wire has a diameter of 2.053 mm. Calculate the resistance of a 37.0 m long piece of such wire.
Alinara [238K]

Answer:

R=1923Ω

Explanation:

Resistivity(R) of copper wire at 20 degrees Celsius is 1.72x10^-8Ωm.

Coil length(L) of the wire=37.0m

Cross-sectional area of the conductor or wire (A) = πr^2

A= π * (2.053/1000)/2=3.31*10^-6

To calculate for the resistance (R):

R=ρ*L/A

R=(1.72*10^8)*(37.0)/(3.31*10^-6)

R=1922.65Ω

Approximately, R=1923Ω

5 0
3 years ago
What is the primary function of NCEES?
charle [14.2K]

Answer:

It is a non profit organization that dedicates to licensing professional engineers and surveyors

Explanation:

6 0
3 years ago
Three groups of students are given study outlines for 6 weeks. One group studies 2 hours a night, a second group studies 1 hour
katrin2010 [14]

Answer:

The constant here is the study outline

Explanation:

In scientific research, the constant variable is that part/variable of the experiment that does not change or is set not to change. Examples include temperature, environment or height.

Assuming the scenery described in this question is an experiment. All the groups presented are bound by a constant during the experiment. The constant here is the study outline. The study outline provided to the students is not going to change.

NOTE: There could be confusion as regards the answer being the final exam grade but that will be the dependent variable as that will be the outcome of the experiment while the time spent to study will be the independent variable.

8 0
3 years ago
Describe a project in which you would use a pleater, ruffling foot, or gathering foot. Explain each of these tools and choose th
WITCHER [35]

A project that requires using a pleater, a ruffling foot, or a gathering foot is the creation of a dress.

A pleater, a ruffling foot, and a gathering foot are all accessories for sewing machines or machines themselves that help fashion designers to give the fabric a different shape or texture, and therefore create unique pieces.

  • Pleater: This tool includes multiple needles that go through the fabric to create multiple pleats
  • Ruffling foot: This is usually an accessory for sewing machines to create ruffles
  • Gathering foot: This tool is used to create gathers in fabric, these differ from ruffles because they are smaller and more subtle than ruffles

All of the tools can be used in the creation of a dress, for example, a pleater can be used in the top section of the dress to give it a nice texture and make it different from the skirt. In the same way, others such as the ruffling foot or the gathering foot can be used in the sleeves of the dress.

Learn more in: brainly.com/question/24702927

8 0
3 years ago
Other questions:
  • OSHA does not approve individual states to have their own safety and health program.
    15·2 answers
  • Light energy produces the only voltage in a solar cell. (a)-True(T) (b)- false(F)
    9·1 answer
  • A coal-fired power plant is burning bituminous coal that has an energy content of 12,000 Btu/lb. The power plant is burning the
    13·1 answer
  • 9. A vehicle is having routine maintenance performed.
    7·1 answer
  • In a CNC machining operation, the has to be moved from point (5, 4) to point(7, 2)along a circular path with center at (7,2). Be
    5·1 answer
  • I want to solve the question
    11·1 answer
  • What Number Am I?
    13·1 answer
  • Rotating magnetic field inside a set of conducting wires is a simple description of a what
    14·1 answer
  • : A drive system using the electric motor is under load as 75Nm with an angular velocity of 100rad/s, then the electric motor is
    11·1 answer
  • Define waves as it applies to electromagnetic fields
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!