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Sergio [31]
3 years ago
12

(Power Cycle)​ Your new boss announces at a team meeting that she has developed atechnology that will perform a power cycle that

operates between hot and cold reservoirs at 902 °C and 22 °C that produces a power output of 28 kW while receiving 150,000 kJ/hof energy via heat transfer from the hot reservoir. You are suspicious that this cyclesounds too good to be true, so you decide to check. What do you find
Physics
1 answer:
Angelina_Jolie [31]3 years ago
8 0

Answer:

answered

Explanation:

The maximum possible efficiency is  

\eta= 1-\frac{T_L}{T_H}

\eta= 1-\frac{295}{1175}

= 0.7489

W_out= 28 KW

Q_in= 15000/3600= 41.67 KW

now

\eta= \frac{W_out}{Q_H}

\eta= \frac{28}{41.67} =0.6791

which is less than \eta_{max}

claim is true

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According to einstein's theory of simple relativity (_E + mc(2)_). BLANK is converted into BLANK.
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Answer:

energy is converted into mass

Explanation:

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An atom that has 117 protons in its nucleus has not yet been made. Once this atom is made, to which group will element 117 belon
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A physics instructor wants to project a spectrum of visible-light colors from 400 nm to 700 nm as part of a classroom demonstrat
Likurg_2 [28]

Answer:

  Dr = 263 10⁻⁶ m

Explanation:

The diffraction pattern for constructive interference is described by

        a sin θ = m λ

in this it indicates that the order of diffraction is m = 1

Let's use a direct proportion rule to find the separation of two slits. If there are 600 lines in 1 me, what is the distance between 2 slits

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    a = 3.33 10⁻³ mm = 3.33 10⁻⁴ cm

let's use trigonometry

      tan θ = y / L

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      tan θ = sin θ / cos θ sin θ

      sin θ = y / L

we substitute

     a  y/L = λ

     y = λ L / a

for λ = 400 10-9 m

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f

or λ = 700 nm

        y_f = 700 10⁻⁻⁹ 2.9 / 3.33 10⁻³

        y_f = 609.609 10⁻⁶ m

the separation of this spectrum

        Δr = v_f - i

        Dr = (609.609 - 346)  10 ⁻⁶

        Dr = 263 10⁻⁶ m

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I'm pretty sure it's D. The stars don't influence the moon's phases.
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Which of these experiments tests a chemical property of an object??
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<span>B. shining a bright light on the objects and testing for decomposition </span> <span>      

In explanation, chemical property is a characteristic of a certain substance came from an outcome due to chemical change or reaction. In the situation above, more specifically toxicity is involved in the chemical property/change. Hence, when the object is tested for decomposition. Like for an example of decomposition simply in metals, rusting. Rusting a process of degeneration of metals. Here it works the same. Toxicity is how much damage did a certain entity do to the object. </span>



8 0
3 years ago
Read 2 more answers
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