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AlexFokin [52]
3 years ago
7

In a steady-flow industrial process, m kg/s of an ideal gas flows through a heater at a constant mass flow rate. It is your job

to select a heater that is powerful enough to heat the gas from T i (300 K) to T e (350 K). Your calculation doesn't have to be perfect because you can always adjust the power to the heater slightly, so you decide to assume that specific heats are constant. Which of the following equations would give you the correct power for the heater, and why?
Engineering
1 answer:
kodGreya [7K]3 years ago
8 0

Answer:

P=  m°  Cp (  Te - Ti)

Explanation:

Given that

Mass flow rate = m° kg/s

Ti= 300 K

Te= 350 K

We know that flow work given as

W= h₂ - h₁

We know that for ideal gas enthalpy is the function of temperature only.

Δh= CpΔT

Cp= Specific heat capacity

ΔT =Change in temperature

So the heater power given as

P = m° (  h₂ - h₁)

P=  m°  Cp (  Te - Ti)

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Have the power company install insulated sleeves (also known as “eels”) over power lines.​

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Explanation:

To prevent electrocution at workplace, employers can ensure that the  power company install insulated sleeves (also known as “eels”) over power lines.​ Additionally, the employees should wear PPEs which are insulators to prevent electrocution.

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11. Which of these is NOT true when dealing with refrigerants?
Alexus [3.1K]
Answer is an increase in pressure will cause an decrease in the pressure
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A skilled worker with the ability to operate computer numerically controlled (CNC) machines is qualified to work in which of the
KengaRu [80]

Answer:

Machinist

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3 years ago
Tech A says that speed density systems use vehicle speed and fuel density to determine injector pulse width. Tech B says that ma
bogdanovich [222]

The person that is correct based on the 2 statements from Tech A and Tech B is; Tech B

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However, for Tech A is incorrect and so the correct answer is that Tech B is right because his statement corresponds with the definition of mass flow sensor.

Read more about fuel injection engines at; brainly.com/question/4561445

8 0
3 years ago
The velocity of a particle which moves along the s-axis is given by = 40 − 3 2/ , ℎ t is in seconds. Calculate the displacement
scoundrel [369]

The displacement ∆S of the particle during the interval from t = 2sec to 4sec is; 210 sec

<h3>How to find the displacement?</h3>

We are given the velocity equation as;

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Thus, the speed equation will be gotten by integration of the velocity equation to get;

s = ∫40 - 3t²

s = 40t - ¹/₂t³

Thus, the displacement between times of t = 2 sec and t = 4 sec is;

∆S = [40(4) - ¹/₂(4)³] - [40(2) - ¹/₂(2)³]

∆S = 210 m

Read more about Displacement at; brainly.com/question/4931057

#SPJ1

8 0
2 years ago
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