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Varvara68 [4.7K]
3 years ago
14

In a bwr or pwr, steam is generated with a temperature of about 290 °c. if river water used to receive waste heat has a temperat

ure of 20 °c, what is the maximum possible (ideal) conversion efficiency of the reactor's thermal energy into electrical energy? nuclear power plants typically have conversion efficiencies of 34%. why is this efficiency less than the ideal efficiency?
Physics
1 answer:
azamat3 years ago
4 0
The answer is The power will decrease to 75 percent of its previous value

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Who did not have experimental evidence to support his theory of the atom? Dalton Thomson Rutherford Democritus
Aloiza [94]

Democritus was the one who did not have experimental evidence to support his theory of the atom.

Answer: Option 4

<u>Explanation: </u>

The discovery of atoms were first stated by Democritus but due to the absence of any experimental proof, his statement was not noted as significant at that time.

After this, Dalton made the specific assumptions formulating some postulates for the atomic theory with proof. Then the cathode rays tube experiments performed by Thomson lead to the formation of plum pudding models of atom.

This is followed by Rutherford’s gold foil experiment discovering the presence of nucleus inside the atoms. So, Democritus first stated but due to absence of experimental evidences, his theory of atoms were not supported at that time.

3 0
3 years ago
Which of the following BEST describes the term "air resistance"?
KatRina [158]
<span>BSL Physics Glossary - air resistance - definition. Translation: Air resistance is a force that is caused by air. The force acts in the opposite direction to an object moving through the air.</span><span>
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8 0
3 years ago
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What inferences can you make about the melting points of the different substances and the motion of their particles, based on th
miv72 [106K]
Here’s the answer now hand over the brainilyiest

7 0
2 years ago
What is number 30,31 in this picture?
Maslowich
On question 30, that is a displacement- time graph (DT). On this type of graph the gradient is equal to the velocity. B has the steepest gradient, then A and finally C

Now velocity is a vector quantity so it has a direction and speed ( speed doesn't have a fixed direction.)

on the DT graph im going to assume that movement B is a positive velocity with A and C being negative. 
So by ranking these: A is the most negative, C is the least negative and B has to be the greatest as it is the only positive velocity. 

Q31, The same type of graph is present, by looking at the gradients we can rank the largest and smallest velocities- speeds in the case of the question. 
i'll skip my working out as its the same as before:

C, B, A and then D

the same idea as on Q30 applies to Q31 part b, 

D,C,B then A 
6 0
3 years ago
How many milliliters are in 1.2 L ( 1 mL= 0.001 L
alisha [4.7K]
1200 mL

1.2L*1000mL/1L=1200mL (after canceling alike units)
Hope this helps:)
4 0
3 years ago
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