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OlgaM077 [116]
3 years ago
14

A nuclear power plant generates a total of 150mw of power and 45% of this power is wasted heat that is discharged on the cooling

water of a river. the river flows at 660.43 gal/s and has an upstream temperature of 64.4 ⁰f. what is the temperature of the river downstream of the nuclear power plant (in k)?
Physics
1 answer:
Sedbober [7]3 years ago
8 0
The temperature of the river downstream of the nuclear power plant will be 53.3  degrees f

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A scientist notices that an oil slick floating on water when viewed from above has many different rainbow colors reflecting off
Semenov [28]

Answer:

Explanation:

In case of oil slick a thin layer of oil is formed on water . This thin layer creates a rainbow of colour . The phenomenon is due to interference of light waves , one reflected from the upper surface of oil and the other reflected from the lower surface of the oil.

For formation of bright colour

2 μ t = ( 2n + 1 ) λ / 2

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given μ = 1.2 ,   λ = 750 x 10⁻⁹   ,

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2 μ t = n λ

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3 years ago
Determine the gravitational field 300km above the surface of the earth. How does this compare to the field on the earth's surfac
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The strength of the gravitational field is given by:
g= \frac{GM}{r^2}
where
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M is the Earth's mass
r is the distance measured from the centre of the planet.

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g= \frac{GM}{r^2}= \frac{(6.67 \cdot 10^{-11} m^3 kg^{-1} s^{-2})(5.97 \cdot 10^{24} kg)}{(6.67 \cdot 10^6 m)^2}  = 8.95 m/s^2

And we can see this value is a bit less than the gravitational strength at the surface, which is g_s = 9.81 m/s^2.
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3 years ago
Which forces are shown on a free body diagram?
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Answer:

What is a Free Body Diagram?

The free body diagram helps you understand and solve static and dynamic problem involving forces. It is a diagram including all forces acting on a given object without the other object in the system. You need to first understand all the forces acting on the object and then represent these force by arrows in the direction of the force to be drawn.

Explanation:

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