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Harlamova29_29 [7]
3 years ago
15

A student made a model of isostasy by placing a block of wood in a beaker of water. What does the water in the beaker represent

in the model? A.A glacier B.Earth's crust C.Earth's mantle D.A rebound
Physics
2 answers:
Setler [38]3 years ago
6 0
The answer is C. the earths mantle because the wood in this case is the surface
Stells [14]3 years ago
5 0

Answer:

C. Earth's mantle.

Explanation:

Isostasy is a Greek word which means equal and standstill. In the theory of Isostasy its has been assumed that Earth's crust is floating over the earth's mantle and the flotation of crust at an elevation over mantle depends upon thickness and density of crust. In the whole scenario gravitational equilibrium should be maintained.

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<h3>the momentum  of the earth</h3>

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A freight train has a mass of [02] kg. The wheels of the locomotive push back on the tracks with a constant net force of 7.50 ×
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Answer:

t = 300.3 seconds

Explanation:

Given that,

The mass of a freight train, m=1.01\times 10^7\ kg

Force applied on the tracks, F=7.5\times 10^5\ N

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F=\dfrac{m(v-u)}{t}\\\\t=\dfrac{m(v-u)}{F}\\\\t=\dfrac{1.01\times 10^7\times (22.3-0)}{7.5\times 10^5}\\\\t=300.3\ s

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3 years ago
Inappeopiate pratices: what it means? Why it not good idea to use these?
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A hungry 169169 kg lion running northward at 77.377.3 km/hr attacks and holds onto a 31.731.7 kg Thomson's gazelle running eastw
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Answer:  75,242.9 m/s

Explanation:

from the question we are given the following parameters

mass of Lion (ML) = 169,169 kg

velocity of lion (VL) = 777,377.7 m/s

mass of Gazelle (Mg) = 31,731.7 kg

velocity of Gazelle (Vg) = 63,863.8 kg

mass of Lion and Gazelle (M) = 200,900.7 kg

velocity of Lion and Gazelle (V) = ?

The first figure below shows the motion of the Lion and Gazelle with their direction.

The second diagram shows the motion of the Lion and Gazelle with their directions rearranged to form a right angle triangle.

from the triangle formed we can get the velocity of the Lion and Gazelle immediately after collision using their momentum and Phytaghoras theorem

momentum = mass x velocity

momentum of the Lion = 169,169 x 77,377.3 = 13,089,840,463.7 kgm/s

momentum of the Gazelle = 31,731.7 x 63,863.8 = 2,026,506,942.46 kgm/s

momentum of the Lion and Gazelle = 200,900.7  x V

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13,089,840,463.7 + 2,026,506,942.46 =  200,900.7 x V

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V = 75,242.9 m/s

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