They absorb the energy of seismic waves.
Explanation:
Base - isolators, rubber and steel pads under buildings reduces earthquake damage by absorbing the energy of seismic waves.
- Earthquakes are produced by the sudden release of energy within the earth which causes displacement and sharp movement on earth surface.
- There are four main types of waves that are propagated by seismic waves which wrecks havoc.
- Understanding the waves and their properties has been useful in designing earthquake resistant structures.
- Base-isolators, rubber and steel pads helps to absorb seismic waves.
- When seismic waves are absorbed, they are cut off.
- This way they cannot cause damage.
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Answer
Give that,
mass of two student m = 3.10 kg
distance from the axis of the rotation is r = 1 m
angular speed ω = 0.754 rad /s
moment of inertia I = 3.10 kg m²
position from the rotation of the axis is r_1 = 0.29 m
Total moment of inertia I ' = I + 2 m r²
= 3.1 +2 x 3.1 x( 1)^2
= 9.3 kg m²
moment of inertia inward horizontally from the position of rotation axis is
I" = I + 2 m r^2
= 3.1 + 2 * 3.1 kg ( 0.29)^2
= 3.62 kg m^2
a ) new angular speed is ω_1 =
= 
= 1.94 rad /s
b ) K.E before the system pulls weight inward is
c )K.E after the system pulls weight inward is
Answer:
I believe the answer is d but I could be wrong not a 100% sure.
Rock layers are folded and appear to be scratched because of the plate tectonics and the glacial advance.
Answer: Option 1 and 2.
<u>Explanation:</u>
Plate tectonics and the glacial advance are the geological phenomenon which have the power to effect the layers of the rock. Because of these, there can be scratches on the layers of the rock and the layers of the rocks can be folded.
The huge mass of ice that is included in the glacier which may be of thickness of three to four kilometers is a lot to scratch the rocks. These glaciers are responsible for moving the rocks from their original position to a new place altogether.
