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sveticcg [70]
3 years ago
12

PLEASE HELP, TEST MULTIPLE CHOICE QUESTIONS

Engineering
2 answers:
Rina8888 [55]3 years ago
8 0

Answer:

c

Explanation:

dbfjex vadamhqrmtwg

Katena32 [7]3 years ago
5 0

Answer:

1) Transhumanism will provide the most significant benefits in which of the following areas?

This refers to the implementation of technologies (like chips) to the human body with the objective of upgrading it, so it is safe to say that the biggest benefit will be in the health area, option a

2) What makes a tool a kind of technology?

Technology is something that helps to solve problems in an easier way, so a tool is a kind of technology because it can simplification some given task, here the correct option is c

3) Which of the following best explains why research is an important first step?

Research is important because the objective of the scientist discovers new things, here the correct option is b: It ensures experiments focus on new information. None the less, sometimes scientists it is important to conduct the exact same experiments that other scientists already did, in order to see the repetitively of the experiment, so option d also can be correct.

4) Which of the following explains how technology and engineering are related?

Engineering tries to solve problems with a science focus, and technology is used to solve problems in the easier way possible, so one of the focus of the engineering creates new technologies (of course, technology is developed with science and engineering) the correct option here would be option c.

5) Which of the following helps distinguish the Iron Age for other periods?

Iron age means that the people at the time could use iron, and for use iron, they needed to smelt it, so the correct option is c.

6) A fair test has many variables.

It can have many (most common cause is that the variables are actually really difficult to manage), but it is not a need, so this would be false. In a fair test, all the variables are controlled except one, if there are only two variables, only one must be controlled.

7)Why is it that technology designed to communicate can also make communication more difficult?

These types of technologies, like cellphones, usually can diminish interpersonal skills, because it allows us to directly not talk face to face with others. Option D

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Answer:

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Explanation:

Given

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So COP of refrigeration is given as follows

COP=\dfrac{T_L}{T_H-T_L}  ,T in Kelvin.

COP=\dfrac{261}{313-261}

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RE is the refrigeration effect

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5.01=\dfrac{15}{W_{in}}

b)W_{in}=2.998 KW

For heat pump

So COP of heat pump is given as follows

COP=\dfrac{T_h}{T_H-T_L}  ,T in Kelvin.

COP=\dfrac{313}{313-261}

c)COP=6.01

In heat pump

Heat rejection at high temperature=heat absorb at  low temperature+work in put

Q_R=Q_A+W_{in}

Given that Q_A=15KW

We know that  COP=\dfrac{Q_R}{W_{in}}

COP=\dfrac{Q_R}{Q_R-Q_A}

6.01=\dfrac{Q_R}{Q_R-15}

d)Q_R=17.99 KW

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Can the United States defeat Iranian forces
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yes for sure

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Extension lines:-

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Object lines

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