<u>Answer:
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Earth convection occurs at the mantle layer
<u>Explanation:
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The movement of less dense material above the more dense material is called as convection. The mantle is the layer that lies between the core and the crust of the earth. The mantle is composed of rocks containing silicon, magnesium, oxygen, aluminium, iron and other minerals.
The heat energy of the core is transmitted to the rock in the lower mantle. This makes the rock with less temperature that lies in upper mantle to move down slowly. Now the rocks that are pushed up is eventually cooled and again pushed down by the hotter rock from the lower mantle. This is called as convection in earth’s mantle .
Answer:
Excessive heat causes atoms to move more rapidly, disturbing the magnetic domains. As the atoms are sped up, the percentage of magnetic domains spinning in the same direction decreases. This lack of cohesion weakens the magnetic force and eventually demagnetizes it entirely.
Answer:
As a result, sound waves travel faster in solids than in liquids, and faster in liquids than in gasses. While the density of a medium also affects the speed of sound, the elastic properties have a greater influence on the wave speed. The density of a medium is the second factor that affects the speed of sound. ( sorry its a bit long :b)
Explanation:
Answer:
= 98.21 m/s
Explanation:
The block has a final potential energy
U = mgh
U = (1.72)(9.8)(0.138)
= 2.3261 J
How after of the collision the block's mechanical energy is conserved, then we can calculate the block's initial velocity
2.3261 =
2.3261 =
v = 1.6446 m/s
In the collision is conserved the lineal momentum of the system then:
(1.72)(0) + (0.0085)(431) = (1.72)(1.6446) + (0.085)
3.6635 = 2.8287 + 0.0085
= 98.21 m/s
Answer:
36 N
Explanation:
Velocity of a standing wave in a stretched string is:
v = √(T/ρ),
where T is the tension and ρ is the mass per unit length.
300 m/s = √(T / 4×10⁻⁴ kg/m)
T = 36 N