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
son4ous [18]
3 years ago
5

User account

Computers and Technology
1 answer:
Tasya [4]3 years ago
5 0
Numa máquina térmica uma parte da energia térmica fornecida ao sistema(Q1) é transformada em trabalho mecânico (τ) e o restante (Q2) é dissipado, perdido para o ambiente.



sendo:

τ: trabalho realizado (J) [Joule]
Q1: energia fornecida (J)
Q2: energia dissipada (J)


temos: τ = Q1 - Q2

O rendimento (η) é a razão do trabalho realizado pela energia fornecida:

η= τ/Q1

Exercícior resolvido:
Uma máquina térmica cíclica recebe 5000 J de calor de uma fonte quente e realiza trabalho de 3500 J. Calcule o rendimento dessa máquina térmica.

solução:

τ=3500 J
Q1=5000J

η= τ/Q1
η= 3500/5000
η= 0,7 ou seja 70%

Energia dissipada será:



τ = Q1 - Q2
Q2 = Q1- τ

Q2=5000-3500
Q2= 1500 J

Exercicio: Qual seria o rendimento se a máquina do exercicio anterior realizasse 4000J de trabalho com a mesma quantidade de calor fornecida ? Quanta energia seria dissipada agora?



obs: Entregar foto da resolução ou o cálculo passo a passo na mensagem
You might be interested in
What can be described as a measure of the amount of matter or material an object contains as well as taking gravitational pull i
aniked [119]

Answer:

The mass of an object is a measure of the object's inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.

5 0
3 years ago
What are the first steps that you should take if you're unable to get onto the internet
sergij07 [2.7K]
Restart phone or go to settings
7 0
3 years ago
Read 2 more answers
In what way do coastal mountains affect a regions climate
Inessa [10]

Their climate's will differ because one is on the coast so winds off the ocean often prevent extremes of hot and cold. This coastal areas have mild marine climates, with relatively mild winters and cool summers, and the Mountain ranges in a path of prevailing winds affect precipitation on either side of a mountain.

3 0
3 years ago
Read 2 more answers
&gt;&gt;&gt; phrase = "abcdefgh" <br><br> &gt;&gt;&gt; phrase[3:6]
Scrat [10]

Answer:

Following are the correct code to this question:

phrase = "abcdefgh"#defining a variable phrase that holds a string value

print(phrase[3:6])#use print method for slicing and print its value

Output:

def

Explanation:

In the above code, a variable "phrase" is defined that holds a string value, and use a print method, inside the method, the variable is used as a list and use slicing.

It is a characteristic that enables you to access the series parts like strings, tuples, and lists. It also uses for modifying or removing objects in series, in the above slicing it starts from 3 and ends when it equal to the 6th letter, that's why it will print "def".

6 0
3 years ago
The _____ document, created during the requirements-gathering and analysis phase of the systems development life cycle (SDLC), i
daser333 [38]

Answer:

The answer to this question is the option "a".

Explanation:

In computer science, the term SDLC stands for Software Development Life Cycle or it is also known as the System Development Life Cycle. This process used by the software industry to produce high-quality software. It aims to produce high-quality software that fulfills customer expectations. The term system specifications is a part of the SDLC. In this part we check the software support the system or not so the answer to this question is system specifications.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Depending on the manufacturer of the bios, what two different post beep code sequences indicate a memory error?
    11·1 answer
  • How are blogs and wiki alike
    15·2 answers
  • What does DOS stand for?
    15·1 answer
  • How does the DNS solve the problem of translating domain names like example.com into IP addresses?
    9·1 answer
  • A graph of an organization'snet income over the past 10 years is an example of an analogmodel.
    7·1 answer
  • Use comparison operators to write a question that the database will understand. Which records are more than or the same as three
    8·1 answer
  • Ou are driving in stop-and-go traffic during the daytime, and someone in another vehicle tells you that your brake lights are no
    10·1 answer
  • How are cars made in georgia
    15·1 answer
  • Which of these is NOT a reason for an IP Address?
    15·2 answers
  • A pcr-based method to detect a specific pathogen in a specimen works by amplifying a ________ that is specific to the prospected
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!