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hichkok12 [17]
3 years ago
13

When a fluid is heated, what changes occur?

Physics
1 answer:
lisov135 [29]3 years ago
8 0
The answer to this question is A. It becomes less dense and begins to rise.
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A steam power plant produces 500 MW of electricity with an overall thermal efficiency of 35%. Determine (a) the rate at which he
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Answer:

Explanation:

500 MW = 500 X 10⁶ J / s

If R be the rate of heat supplied and 35 % is the efficiency of conversion

R x .35 = 500 X 10⁶

R =  500 X 10⁶ / .35

= 1428.57 x 10⁶ J / s

b )

Rate of heat going waste

= .65 x 1428.57 x 10⁶

= 928 .57 x 10⁶ J / s

c )

Heat content of coal = 30 x 10⁶ J /kg

1428.57 x 10⁶ J of heat will come from

= 1428.57 x 10⁶ J  / 30 x 10⁶ J /kg

= 47.62 kg per second

= 47.62 x 24 x 60 x 60 =  4114368 kg in one day

= 4114368 / 907.185 ton per day  

= 4535.31 ton per day

d ) Fuel consumption rate  will decrease by 12.5  % if thermal efficiency is increased to 40 % .  

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3 years ago
PLEASE HELP NEED ANSWERS NOW! Time-Distance Graph
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4 0
4 years ago
If you take a bar magnet with both n & s poles and cut it in half, you get
creativ13 [48]
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7 0
3 years ago
What is the frequency of radiation whose wavelength is 11.5 a0 ?
irakobra [83]

Answer:

The frequency of radiation is 2.61 \times 10^{17} s^{-1}

Explanation:

Given:

Wavelength \lambda = 11.5 \times 10^{-10} m

Speed of light c = 3 \times 10^{8} \frac{m}{s}

For finding the frequency of radiation,

  c = f \lambda

  f = \frac{c}{\lambda}

  f = \frac{3 \times 10^{8} }{11.5 \times 10^{-10} }

  f = 2.61 \times 10^{17} s^{-1}

Therefore, the frequency of radiation is 2.61 \times 10^{17} s^{-1}

4 0
3 years ago
Define velocity??????
ira [324]

Answer:

the speed of something in a given direction.

Explanation:

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3 years ago
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