The vibrations travel faster than noise. When the ground moves it is coming directly from the source, and when you hear it the sound waves are big and take more time to travel.
Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP & passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.
Here, Distance = 145 - 98 miles = 47 miles
Time Taken = 45 minutes = 3/4 hours
We know, Speed = Total Distance / Time Taken
Substitute their values in to the expression :
Speed = 47 / 3/4
Speed = 47*4 / 3
Speed = 188 / 3
Speed = 62.666
After round-off to the nearest tenth, it would be: 62.7
So, option D is your correct answer.
Hope this helps!
The answer is; 1
Most of the photosynthetic organisms are located in the epipelagic zone of the oceans where sunlight can penetrate before diffusing and becoming too weak to support photosynthesis. The epipelagic zone is filled with plankton. When this plantkon die, they begin to sink slowly to the bottom of the ocean. These plankton are food for small fish. These small fish are food for bigger fishes. This is how an ecosystem is sustained in the deep dark oceans.
