The effect of negative pressure or vacuum, lowers the boiling point of fluids. Water will boil at room temperature in a vacuum. Automotive cooling systems are pressured to achieve the opposite result of raising the boiling temperature.
effect of negative cash flow
Serious dehydration is a form of hypovolaemic shock and would lower BP.
Any fluid does.
Venturi effect
pressure gradient is
A backpressure is a pressure which is opposed to the flow of a fluid.
Radius
a fluid naturally flows from an area of the high pressure to an are of low pressure.
pressure gradient
It flows from high pressure are to low pressure area.
decrease in pressure from one point in a pipe or a duct to another point downstream of the fluid flow. It is due to frictional forces on a fluid that flow through a pipe or a duct
The more rougher the surface is the more it decreases the flow rate of the liquid!!