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Advocard [28]
3 years ago
10

A power plant burns fuel to convert water to steam. During the process, 83% of the heat produced is transferred. Of the heat car

ried by the steam, 40% is converted to the mechanical energy of the spinning turbine. Which best describes the overall efficiency of the heat-to-work conversion in the plant
Physics
1 answer:
9966 [12]3 years ago
6 0

Answer: 33.2\%

Explanation:

Given

83% heat is transferred and out of this, only 40% is converted to the mechanical energy of spinning turbine.

The overall efficiency is the product of all the efficiency i.e.

\eta_t=0.83\times 0.4\\\eta_t=0.332\ \text{or}\ 33.2\%

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Describe the contributions of Mathieu Orfila and Robert Christison to the field of toxicology
riadik2000 [5.3K]

Answer:

They developed a test for poisons in the human tissues

Explanation:

Around the 19th century, Mathieu Orfila and Robert Christison developed important tests that identified poisons in human tissues.

By so doing, they laid the foundation for what is now called forensic toxicology. This science attempts to identify poisons in human tissues especially by way of autopsies and forensic investigation.

Today forensic toxicology has expanded to include alcohol testing techniques as well as testing athletes for intake of performance enhancing substances.

6 0
3 years ago
A student said, "The displacement between my dorm and the lecture hall is 1 kilometer."
Ann [662]

Answer:

d) Both a and b are correct

Explanation:

Displacement: It is defined as the distance between initial and final position during motion.

Distance: It is defined as the total path length traveled by object

Or

It is the distance of one place from other place.

Student said that the displacement between my dorm and the lecture hall is 1km.

It is not displacement .It is distance or we say path length.

Therefore, he is using  incorrect physical quantity for the information provided.

He should have called distance 1 km or path length 1 km.

Option d is true.

5 0
3 years ago
Which term describe the substance that forms when two or more types of atoms join?
xz_007 [3.2K]
C i’m pretty sure but don’t take me as your first answer i just need to answer a question to ask one.
4 0
3 years ago
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What are differences between an entrepreneur and an employee<br>​
Wewaii [24]
Employees execute tasks while entrepreneurs plan. An employee can take work day by day, whereas an entrepreneur has to consider how well the tasks are being performed relative to the long-term plan for the business.
4 0
2 years ago
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A car stops in 120 m. If it has an acceleration of –5m/s 2 , how long did it take to stop
vova2212 [387]

Answer:

t=240s

Explanation:

Distance=120m

Acceleration=-5m/s^2

v=0

Let u=x m/s

Using equation v^2-u^2=2as:-

0-x=2(-5)(120)

-x=-1200

x=1200m/s

Using now equation v=u+at:-

0=1200+-5t

5t=1200

t=240s

8 0
4 years ago
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