Answer:
The mechanisms used to produce sound vary from one family of cetaceans to another. Marine mammals, such as whales, dolphins, and porpoises, are much more dependent on sound for communication and sensation than are land mammals, because other senses are of limited effectiveness in water. Sight is less effective for marine mammals because of the particulate way in which the ocean scatters light. Smell is also limited, as molecules diffuse more slowly in water than in air, which makes smelling less effective. However, the speed of sound is roughly four times greater in water than in the atmosphere at sea level. As sea mammals are so dependent on hearing to communicate and feed, environmentalists and cetologists are concerned that they are being harmed by the increased ambient noise in the world's oceans caused by ships, sonar and marine seismic surveys.[2]
Answer:
authority, accuracy, objectivity, currency, coverage, and appearance.
Explanation:
There are six criteria that should be applied when evaluating any Web site: authority, accuracy, objectivity, currency, coverage, and appearance. For each criteria, there are several questions to be asked.
Answer:
2.5
Explanation:
The only value given is that of 'E', so 2.5 is the answer
"No Gumption" happens during the Great Depression, Russell Baker is eight years old, he and his mother has scarce resources and face many issue due to the time, for this reason her mother wants his to start a career in business, she gets a job selling newspaper for him, however, baker does not want to do it, her actions are influenced for the difficult times they are passing by.