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Aliun [14]
3 years ago
10

Which of the following lists the composition of the Earth’s outer core?

Physics
1 answer:
iris [78.8K]3 years ago
5 0
Well,

The outer core of the Earth is mostly composed of iron and nickel.

The correct option is C.
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at certain times the demand for electric energy is low and electric energy is used to pump water to a reservoir 45 m above the g
Readme [11.4K]

The mass of water that must be raised is 5.25\cdot 10^7 kg

Explanation:

Since the process is 70% efficiency, the power in output to the turbine can be written as

P_{out} = 0.70 P_{in}

where P_{in} is the power in input.

The power in input can be written as

P_{in} = \frac{W}{t}

where

W is the work done in lifting the water

t = 3 h = 10,800 s is the time elapsed

The work done in lifting the water is given by

W=mgh

where

m is the mass of water

g=9.8 m/s^2 is the acceleration of gravity

h = 45 m is the height at which the water is lifted

Combining the three equations together, we get:

P_{out} = 0.70 \frac{mgh}{t}

Where

P_{out} = 150 MW = 150\cdot 10^6 W

And solving for m, we find:

m=\frac{Pt}{0.70gh}=\frac{(1.50\cdot 10^6)(10800)}{(0.70)(9.8)(45)}=5.25\cdot 10^7 kg

Learn more about power:

brainly.com/question/7956557

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3 0
3 years ago
A hot plume of mantle material, which may extend to the core-mantle boundary, produces a volcanic region a few hundred kilometer
Fantom [35]

Answer: Hot spot

The volcanic hot spot is an area in the mantle from which heat rises as a thermal plume from deep in the Earth.

5 0
3 years ago
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Which object exerts more gravitational force, object A with a mass of 15 grams and a density of 2g/cm3 or object B with a mass o
puteri [66]
The answer is B.

More mass means more gravitational force.

Hope it helps!
8 0
3 years ago
Which can lead to an inaccurate tympanic temperature reading?
lozanna [386]

Significant ear drainage or a scarred tympanic membrane can lead to inaccurate results on a tympanic temperature reading.

<h3>Why inaccurate tympanic temperature reading?</h3>

Significant ear drainage or a scarred tympanic membrane can lead to inaccurate results on a tympanic temperature reading.

Although an ear infection or the presence of an ear infection will not significantly affect a tympanic thermometer reading.

If the client has been sleeping on one side, take the temperature on the other side as heat may be increased on the side against the pillow.

Recent consumption of a cold beverage will not affect tympanic temperature.

To learn more about temperature readings, refer https://brainly.ph/question/20039492

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6 0
1 year ago
Question 25 of 25 What is a limitation of modeling the effect of gravity on a falling object by using a ball dropped from differ
agasfer [191]

Answer:

Air slows down The fall of any object including a ball.

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3 years ago
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