A whale's air from it's blow hole is much like when you breath out your nose (don't try making water come out your nose). It depends on what the whale last ate, but if it was krill, the whale probably has krill breath.
Remember the whale is not blowing water from it's blow hole. It is just breathing out its blow hole. When close to the surface, this provides the effect of the water blowing up into the air.
it just blows through it
There she blows is a term whalers used when on the look out for whales. While hunting a whale has to come up for air to breath, and when that happens they shoot a plume of water out of their blowhole to clear the tubes (like a human would using a snorkel if it had become submerged). The plume is tracked, the ship turned, and they try to harpoon the whale.
blue whale
The blowhole is the whale's "nose." Whales breath through them.
a lot
Swimming, breaching (going up to breath), spraying water out of blowhole, reproduction, and singing whale songs.
Greater pressure is exerted inside the whale's body, as the lungs compress and force air out through the blowhole. When the whale surfaces to exhale, the pressure inside its body is released through the blowhole, creating the characteristic spout of mist or water vapor.
from its mothers blowhole they stick on to the blowhole for safety to
No.
It blows water out of their lungs and takes air in just like a humans mouth/nose. So they can breath.
The dog because it has high powered sensors for detecting smell.
A whale just blew its blowhole in the front of the ship.