On the other hand, inquisitive person who is seeking to understand what is the suction, can obtain from the physics explanation, which gives him quite clear idea not only about this but about many other things. It know that we and all objects around us are under atmospheric pressure, amounting to 15 pounds per square inch, i.e. 15 pounds was the average weight of the air column with a base square inch and extending in height from sea level to the limits of the earth day. He learns that when he puts one end of the tube into the water, and the other takes in the mouth and then pulls back her tongue, so forming way space, then there are two phenomena: one is that the pressure of air trapped on the outside of the cheeks, not more than balanced by the same air pressure inside of the cheeks, presses their inside; and another is that the air pressure on the surface water, not balanced over the same pressure inside the tube and mouth ( which included part of the air from the tube), pushes the water inside the tube due to inequality of pressure. Once having comprehended the essence of the so-called suction, he begins to understand what happens when, due to raising the piston in the pump and release of the water from atmospheric pressure, the pressure of the atmosphere on the water around the tube of the pump, not being already balanced by a corresponding pressure in the pipe, causes water to climb the pipe and follow the piston. Only now it's starting to understand why water cannot be raised higher than the theoretical limit equal to 32 pounds. This limit is much lower in practice due to imperfections of the devices. For if, simplifying thought, to assume that pump tube has a cross-section of a square inch, the atmospheric the pressure on the water in the well, equal to 15 pounds per square inch, may lift in the tube the water only to such a height that the entire water column will be weighing 15 pounds. Once installed, this view of the action of the pump, it becomes clear, and the action of the barometer.
1 comment:
On the other hand, inquisitive person who is seeking to understand
what is the suction, can obtain from the physics explanation, which gives him quite
clear idea not only about this but about many other things. It
know that we and all objects around us are under
atmospheric pressure, amounting to 15 pounds per square inch, i.e. 15
pounds was the average weight of the air column with a base
square inch and extending in height from sea level to the limits of the earth
day. He learns that when he puts one end of the tube into the water, and
the other takes in the mouth and then pulls back her tongue, so forming
way space, then there are two phenomena: one is
that the pressure of air trapped on the outside of the cheeks, not
more than balanced by the same air pressure inside of the cheeks, presses
their inside; and another is that the air pressure on the surface
water, not balanced over the same pressure inside the tube and mouth (
which included part of the air from the tube), pushes the water inside the tube
due to inequality of pressure. Once having comprehended the essence of the so-called
suction, he begins to understand what happens when, due to
raising the piston in the pump and release of the water from atmospheric
pressure, the pressure of the atmosphere on the water around the tube of the pump, not being already
balanced by a corresponding pressure in the pipe, causes water to
climb the pipe and follow the piston. Only now it's starting
to understand why water cannot be raised higher than the theoretical limit
equal to 32 pounds. This limit is much lower in practice due to
imperfections of the devices. For if, simplifying thought, to assume that
pump tube has a cross-section of a square inch, the atmospheric
the pressure on the water in the well, equal to 15 pounds per square inch, may
lift in the tube the water only to such a height that the entire water column will be
weighing 15 pounds. Once installed, this view of the action of the pump,
it becomes clear, and the action of the barometer.
Post a Comment