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In order to make a working model on force and pressure, the relationship between these two things must be determined. This can be inferred from physics formulas.
By reducing the pressure
Pressure gradient is the rate of pressure change as you change position, not just the difference between the lowest pressure and the highest pressure, but how great (or small) the physical distance between them. Since it the pressure difference that make air flow (wind) the greater the pressure gradient, the greater the wind.
The attractive force depends on mass, not substance. Different subtances make no difference on attracitve force.
The potential difference in electricity is the Electromagnetic Force, in Volts, measured across the two wires that make the circuit.
The horizontal dimensions of the container ... like length and width ... don't make any difference. But the pressure at the bottom is directly proportional to the depth of the liquid, which is ultimately limited by the height of the container.
high pressure, low temperature.
In order to make a working model on force and pressure, the relationship between these two things must be determined. This can be inferred from physics formulas.
Pressure is given by the equation P = F/A, where F is force and A is the area it's applied over. For a solid or liquid, you can increase pressure just by pushing harder on it. For a gas, pressure is approximately given by P = (n*R*T)/V, where n is how much gas you have in moles, T is the temperature in kelvin, V is the volume of the container, and R is a constant. So to increase pressure, either increase the amount of gas, increase the temperature, or decrease the volume of the container.
Neither one will make any difference in water pressure.
By reducing the pressure
When you suck on a straw the pressure at the top of the straw becomes lower than the pressure at the bottom, which forces liquid up.
the force of gravity overtakes the mass of the solution causing acceleration to increase therefore causing a force that pushes down the liquid, after this event has happened the suction force of the bottle redirects the resultant forces of the liquid to flow; causing the mgsin@ to push downwards while the force of suction plus cohesion make the liquid attached to the rim of the bottle.
Reducing the air pressure allows the molecules to escape
Squeeze it somehow ... gravity works, so do pistons and cylinders.
pressure groups
Differential pressure is the difference between two pressures. So, P2-P1.