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sammy [17]
2 years ago
10

Which of the following affects the speed of a seismic wave?

Physics
1 answer:
NemiM [27]2 years ago
5 0

Answer:

The answer is B.  composition

Explanation:

  • The speed of a seismic wave is governed by three interrelated factors, viz. the composition of the rock, pressure, and temperature.
  • Seismic waves travel at different speeds in different mediums.
  • This property of the seismic waves tends it to change the speed where the concentration of minerals in the rocks varies.
  • Other than that, the increasing temperature beneath the Earth's surface decreases the speed of the seismic waves, and the speed increases with increasing pressure as the waves go penetrating deep down into the Earth's interiors.
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3 years ago
B)A man walks 95 km, East, then 55 km, north. Calculate his RESULTANT
Varvara68 [4.7K]

The resultant displacement of the man is 109.77 km in the direction N60°E.

<h3>Displacement</h3>

Displacement is the distance travelled in a specified direction.

To calculate displacement, the straight line from starting point to end point of travel is taken and calculated.

<h3>Resultant displacement of the man </h3>

In the example above, a man walks 95 km, East, then 55 km, north.

The two distances form a right-angled triangle with two sides 95 and 55 units. The hypotenuse gives the resultant displacement, D.

Using Pythagoras rule:

D^2 = 95^2 + 55^2

D^2 = 12050

D = 109.77

Thus, the resultant displacement is 109.77 km

To calculate the direction:

Let the direction be y

y + x = 90°

tan x = 55/95

tanx x = 0.578

x = 30°

Then, y = 90 - 30

y = 60°

Therefore, the resultant displacement of the man is 109.77 km in the direction N60°E.

Learn more about displacement at: brainly.com/question/321442

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2 years ago
Savanna regions developed during the Triassic period. true or false
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Savanna regions developed during the Triassic period. is true
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20 characters or more
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Answer:

yes 20 characters or more

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