It's due to more pressure as the sound is searched deep into the waters.<span> The adjustments were done to adapt and make clearer sounds.</span><span>
</span><span>Animal researchers use hydrophone arrays to determine the location of the whale calls. </span><span>Another equipment is the Sound Surveillance system, it is used on the sea floor once during the cold war to detect warships and submarines. But now it is used in researchers to understand animals in the ocean. </span>
Variation can be direct, inverse or joint.
The value of B when a = 48 and c = 4 is 8
The joint variation is represented as:
![A \ \alpha\ BC](https://tex.z-dn.net/?f=A%20%5C%20%5Calpha%5C%20BC)
Express the variation as equation
![A = kBC](https://tex.z-dn.net/?f=A%20%3D%20kBC)
Make k the subject of the formula
![k= \frac{A}{BC}](https://tex.z-dn.net/?f=k%3D%20%5Cfrac%7BA%7D%7BBC%7D)
If a = 24 when b = 8 and c = 2, we have:
![k = \frac{24}{8 \times 2}](https://tex.z-dn.net/?f=k%20%3D%20%5Cfrac%7B24%7D%7B8%20%5Ctimes%202%7D)
![k = \frac{24}{16}](https://tex.z-dn.net/?f=k%20%3D%20%5Cfrac%7B24%7D%7B16%7D)
![k = 1.5](https://tex.z-dn.net/?f=k%20%3D%201.5)
So,
becomes
![A = 1.5BC](https://tex.z-dn.net/?f=A%20%3D%201.5BC)
Make B the subject
![B = \frac{A}{1.5C}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7BA%7D%7B1.5C%7D)
When a = 48 and c = 4, we have:
![B = \frac{48}{1.5 \times 4}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7B48%7D%7B1.5%20%5Ctimes%204%7D)
![B = \frac{48}{6}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7B48%7D%7B6%7D)
Divide
![B = 8](https://tex.z-dn.net/?f=B%20%3D%208)
Hence, the value of B is 8
Read more about variation at:
brainly.com/question/11544031
Answer:
Climate and River Flow, Erosion
, River Obstructions, Pollution.
Explanation:
Sediment movement contributes to deteriorating environmental factors by causing high turbidity which in turn limits sunlight penetration into the water column. This has a negative effect on the growth of algae and aquatic plants.
Sediments present in rivers with spawning organisms, disrupt the ecosystem because the gravel beds involved in spawning are covered with sediments. The habitat of the fish is therefore, destroyed through this movement process.
Sedimentation can also lead to increased flooding by blocking the effectiveness of the reroute that should occur with water into drainage channels. Flooding, disrupts processes such as water transportation, disrupts day to day living most notably in areas closest to these rivers. These sediments as well could disrupt irrigation by clogging hydraulic mechanisms set in place to provide irrigation.