Seismic waves are waves that move through the Earth as a result of an earthquake. True or false

Physics

2 answers:

gogolik [260]4 years ago

6 0

Answer

True

Explanation.

Some parts of the earth are prompt to earthquakes, volcanic eruptions landslides and magma movements etc. All this may cause energy movements through the earth inform of a wave. These type of waves are called seismic waves.

77julia77 [94]4 years ago

5 0

True that seismic waves are waves that move through the Earth as a result of an earthquake.

Answer: Option A

<u>Explanation: </u>

As we consider that earth crust is composed of plates named as tectonic plates and the irregular movement of these tectonic plates lead to creation of earthquakes. So when these earthquakes are generated, the movement of these tectonic plates will lead to production of seismic waves.

They propagate through earth’s surface just before generation of earthquake. So determining the changes in the seismic waves or getting significant seismic signal indicate the warning of occurrence of earthquakes. So it can be said that seismic waves move through the Earth as a result of earthquake.

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For the chemical reaction C2H6 --> C2H4 + H2 + 137kJ, the chemical energy of the A. reactant and the chemical energy of the p

Goryan [66]

Answer: The chemical energy of reactants is greater than the chemical energy of products.

Explanation: In the given reaction

$C_2H_6\rightarrow C_2H_4 + H_2 +137 kJ$

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3 years ago

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7. A toy car of mass 1.2 kg is driving vertical circles inside a hollow cylinder of radius 2.0m. It is moving at a constant spee

wlad13 [49]

Answer:

$N_{top}=9.8N\\N_{bottom}=33.4N$

b) $v_{min}=4.4m/s$

Explanation:

The net force on the car must produce the centripetal acceleration necessary to make this circle, which is $a_{cp}=\frac{v^2}{R}$ . At the top of the circle, the normal force and the weight point downwards (like the centripetal force should), while at the bottom the normal force points upwards (like the centripetal force should) and the weight downwards, so we have (taking the upwards direction as positive):

$-m\frac{v^2}{R}=-N_{top}-mg\\m\frac{v^2}{R}=N_{bottom}-mg$

Which means:

$N_{top}=m\frac{v^2}{R}-mg=(1.2kg)\frac{(6m/s)^2}{2m}-(1.2kg)(9.8m/s^2)=9.8N\\N_{bottom}=m\frac{v^2}{R}+mg=(1.2kg)\frac{(6m/s)^2}{2m}+(1.2kg)(9.8m/s^2)=33.4N$