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3 years ago

8

The metal control joints used to relieve stresses caused by expansion and contraction in large ceiling or wall expenses in inter

ior drywall systems are called

1 answer:

timurjin [86]3 years ago

6 0

Answer:

It’s called Expansion Joints

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What the different methods to turn on thyrister and how can a thyrister turned off

myrzilka [38]

Answer:

forward voltage triggering

temperature triggering

dv/dt triggering

light triggering

gate triggering

Then turning off;

Turn off is accomplished by a "negative voltage" pulse between the gate and cathode terminals

Explanation:

hope it helps

8 0

3 years ago

Mary is interested in developing new machines that would increase the productivity of small scale farmers. After high school, wh

vovangra [49]

Answer:

Agricultural engineering

Explanation:

Hello,

First, this area of engineering deals with design, construction and upgrade of farm equipment and machines for purpose of production and processing.

This course will equip Mary with the skills and knowledge that can be applied is solving challenges in the field of Agriculture especially in areas of power supplies, machinery efficiency, agricultural products storage and processing, environmental issues, pollution in the ecosystem and structures and facilities that improve agriculture.

The vital skills that Mary should develop while pursing this course are analytical skills to solve complicated systems, technical skills to do proper math, critical thinking skills to be able to think outside the box for solutions and communication skills to proper work with others.

Mary will learn about using software to design systems, machine operation and farm equipment.Her studies will cover ways of modifying the environment for sustainable agricultural practices.She will be able to know ways of testing farm equipment to ensure proper functionality and high output.This is a multi-disciplinary career, hence she will interact with civil engineers, contractors, environmentalists and other stakeholders to ensure the goals of projects are attained.

Hope this Helps Engineer!

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3 years ago

What is a heat engine? State its efficiency (a sketch would be appropriate).

dimulka [17.4K]

Answer:

$\eta =\dfrac{Q_1-Q_2}{Q_1}$

Explanation:

Heat engine

Heat engine is a device which produce work while consuming some amount of energy .This engine works in cycle.In other words we can say that Heat engine is a device which covert thermal or chemical energy in to mechanical energy and after that this mechanical energy can be use for producing mechanical work.

Heat engine takes heat from high temperature and rejects heat to lower temperature and producing work.

We know that efficiency given as

$\eta =\dfrac{out\ put}{in\ put}$

From diagram we can say that

$Q_1=Q_2+W$

So efficiency

$\eta =\dfrac{w}{Q_1}$

$\eta =\dfrac{Q_1-Q_2}{Q_1}$

3 0

3 years ago

I need this asap thank you :) plzzzzz When the spring on a mousetrap car is fully unwound, the force acting on the car is _____.

Usimov [2.4K]

Answer: (only friction) the friction lets it keep its speed and not slow down and it creats volocity between the serface of where the mousecar is running and the wheels on the ground

sorry if im wrong i tried my best

6 0

3 years ago

Chlorine is one of the important commodity chemicals for the global economy. Before the advent of large scale

artcher [175]

The composition of gas in the feed, the percentage conversion and the

theoretical yield are combined to give the product stream composition.

Response:

The composition of gas in the product stream are;

HCl: 0.4 kmol/h, Cl₂: 1.6 kmol/h, H₂O: 1.6 kmol/h, O₂: 0.5 kmol/h

<h3>How can percentage conversion give the contents of the product stream?</h3>

The amount of oxygen used = 30% exceeding the theoretical amount

Number of moles of hydrochloric acid = 4 kmol/h

Percentage conversion = 80%

Required:

The composition of the gas in the product feed.

Solution;

The given reaction is; 4HCl + O₂ $\longrightarrow$ 2Cl₂ + 2H₂O

$Percentage \ conversion = \mathbf{ \dfrac{Moles \ of \ limiting \ reactant \ reacted}{Moles \ of \ limiting \ reactant \ supplied \ in \ the \, feed}}$

Which gives;

$80 \% = \mathbf{ \dfrac{Moles \ of \ limiting \ reactant \ reacted}{4 \, kmol/h}}$

Moles of limiting reactant reacted = 4 kmol/h × 0.80 = 3.6 kmol/h

Which gives;

Number of moles of HCl in the stream = 4 kmol/h - 3.6 kmol/h = 0.4 kmol/h

Number of moles of Cl₂ produced = 2 kmol/h × 0.8 = 1.6 kmol/h

Similarly;

Number of moles of H₂O produced = 2 kmol/h × 0.8 = 1.6 kmol/h

Number of moles of O₂ in the product stream = 30% × 1 kmol/h + 20% × 1 kmol/h = 0.5 kmol/h

The composition of the production stream is therefore;

<u>HCl: 0.4 kmol/h</u>

<u>Cl₂: 1.6 kmol/h</u>

<u>H₂O: 1.6 kmol/h</u>

<u>O₂: 0.5 kmol/h</u>

Learn more about theoretical and actual yield here:

brainly.com/question/14668990

brainly.com/question/82989

7 0

3 years ago