Underwater living faces many of the same life support challenges as living in space. ... But in the future, underwater habitats might provide their own oxygen with artificial gill technology to extract dissolved air from the sea water
Since humans do not have gills, we cannot extract oxygen from water. Some marine mammals, like whales and dolphins, do live in water, but they don't breathe it. They have developed a mechanism to hold their breath for long periods of time underwater.
To put these depths into perspective, three American football fields laid end to end would measure 900 feet (274.32 m) long — less than the distance these divers reached underwater. Most recreational scuba divers only dive as deep as 130 feet (40 meters), according to the Professional Association of Diving Instructors.
Explanation:
The uneven warming of the earth surface causes land and sea breeze over the land and water.
Water has a very high specific capacity and it takes more heat to cause a fractional increase in its temperature. During day, the air around water is cold and dense and under high pressure.
The land adjacent to the water, is a better conduct with a low specific heat capacity. When warming of the earth starts by the sun, the air on land heated by heat radiated from the surface. Air on land is warm, less dense and light.
This forces the air on land to move seaward and the cold air from the sea to move land ward and a sea breeze is set up.
At night the reverse is the case. The land loses heat very fast and the air around it is cold and dense. The water body does not lose heat so fast and the air around is warm and lighter. Air from the land replaces that on the surface of water and a land breeze is set up
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6÷0........ There is no answer to that really 0 is nothing in numbers so I guess it would just stay 6. Know if it was 0÷6 it would be 0 be cause anything divide by zero will always equal 0
Answer:
The flu is caused by influenza viruses that infect the nose, throat, and lungs. These viruses spread when people with flu cough, sneeze or talk, sending droplets with the virus into the air and potentially into the mouths or noses of people who are nearby.
Explanation:
