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.
The pressure exerted on the outside of the can would be 50 Pa (P = F/A).
You don't feel the pressure exerted by the atmosphere because your body is used to it and is able to balance the pressure inside and outside.
Air molecules are constantly moving and colliding with the surface of the eye. The impact of these collisions creates a force that is exerted on the outside of the eye, which we perceive as air pressure. The more air molecules collide with the eye, the higher the pressure exerted.
Pressure can be both internal and external. Internal pressure refers to the force exerted by a fluid within a closed system, while external pressure can be the force exerted by a substance or object outside of the system onto the system.
Lowered Pressure
Greater pressure is exerted inside the whale's body, particularly in the lungs, compared to the pressure outside the blowhole. When a whale surfaces to breathe, it rapidly expels air from its lungs, which is under higher pressure than the atmospheric pressure outside. This pressure differential allows the whale to forcefully expel water vapor and air through the blowhole.
The pressure exerted on the outside of the can would be 50 Pa (P = F/A).
You don't feel the pressure exerted by the atmosphere because your body is used to it and is able to balance the pressure inside and outside.
The pressure of air outside the body is called atmospheric pressure. It is the force exerted by the weight of the air in the Earth's atmosphere on a surface.
Atmospheric pressure out side the body and hydrostatic pressure for animals that live in water
Air molecules are constantly moving and colliding with the surface of the eye. The impact of these collisions creates a force that is exerted on the outside of the eye, which we perceive as air pressure. The more air molecules collide with the eye, the higher the pressure exerted.
Pressure can be both internal and external. Internal pressure refers to the force exerted by a fluid within a closed system, while external pressure can be the force exerted by a substance or object outside of the system onto the system.
Lowered Pressure
at higher altitudes the pressure of air is greater in our lungs as compare to the air pressure outside the body
The pressure of a balloon is greater on the inside because the gas molecules inside the balloon are constantly colliding with the walls of the balloon, creating the pressure that keeps the balloon inflated.
the pressure is high out side the plane because the air moves around quickly.
The top of a barometric tube is sealed leaving no place for air to escape. It works along the same principle as a drinking straw, but in reverse. In a drinking straw, the sucking motion reduces the pressure of the air inside the straw to a lower level than the air outside the straw. Liquid resists changes in volume due to pressure and is drawn up through the tube due to the air pressure exerted on the surface of the liquid outside the straw. In a barometric tube the tube is sealed at one end, trapping a finite amount of gas in the tube. The air pressure inside and outside the tube is equal, keeping the mercury suspended at a certain level. If the pressure outside is raised, more force is exerted on the surface of the mercury outside the tube than on the surface inside. This raises the level of the mercury in the tube until the pressure of the air is equalized -- there is still just as much air in the tube, but a smaller volume at a greater pressure.