Answer:
A. Sound waves can travel through and reflect off rock layers.
Explanation:
Reflection seismology is a process of "seeing" below the ground using artificial sources to create sound waves or the process of learning about rock layers beneath the surface of Earth using sound waves.
Sources on land, uses vibration trucks to shake the ground very powerfully to produce sound waves.
Thus, the sound waves will travel through the earth and reflect off rock layers having different acoustic properties. In order to record this reflections, we make use of a small instrument called geophones.
A curved line on a position/time graph shows that the speed is changing.
So right there, we know there is acceleration.
The intensity increases 16 times.
The relationship between intensity and amplitude is given below:
<span>
I = constant Since, A becomes 4 times, A' = 4A</span><span>
Thus the intensity becomes, I' = constant </span>× (<span>4A)</span>²<span>
</span>⇒<span> I' = 16A</span>²
Therefore, the intensity of the wave is increased by 16 times
Answer:
Vectors and arrows.
Explanation:
Mathematically speaking, forces are represented by vectors, which have magnitude and direction. Graphically speaking, vectors are represented by arrows.
Answer:
Addition reactions with benzenes lead to the loss of aromaticity.
Benzene and its derivatives undergo a type of substitution reaction in which a hydrogen atom is replaced by a substituent, but the stable aromatic benzene ring is regenerated at the end of the mechanism.
Benzene and its derivatives tend to undergo electrophilic aromatic substitution reactions.
Explanation: