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Aleksandr [31]
2 years ago
10

Most of our knowledge about Earth's interior comes from __________. drill holes volcanic eruptions seismic waves examination of

deep mine shafts
Geography
1 answer:
Lostsunrise [7]2 years ago
8 0

Answer:

Seismic waves are recorded by a machine called a seismograph, which tells us about the strength and speed of the seismic waves

Explanation:

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the average of two number is 55 to subtract from the greater number ratio between number become 1:2 the smaller number is
Thepotemich [5.8K]

Complete question:

The average of two number is 55. If 2 is subtracted from the greater number, the ratio between the numbers become 1:2 . The smaller number is

Answer:

The smaller number is 36

Explanation:

let the smaller number = x

let the greater number = y

\frac{x + y}{2} = 55\\\\

x + y = 110

y = 110 - x --------- equation (i)

\frac{x}{y-2} = \frac{1}{2}\\\\ y-2 = 2x\\\\y = 2x + 2 ------equation(ii)

Substitute y in equation (ii)

110 - x = 2x + 2

110 - 2 = 2x + x

108 = 3x

x = 108 / 3

x = 36

Therefore, the smaller number is 36

6 0
3 years ago
Who came up with the concept that geologic processes operating at present are the same processes that operated in the past?
fomenos

Answer:

James Hutton

Explanation:

James Hutton was the geologist who brought this concept of 'Uniformitarianism'. This law describes that all the geological processes that occur now must have taken place in the geological past, with varying intensities, and these processes are responsible for the configuration of the landscape and formation of various surface features on earth.

This was an important discovery that led to a better understanding of the geological processes and how they act on the earth's surface and in its interior.

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