Pressure Flashcards
(30 cards)
What is Thrust?
The force acting on an object perpendicular to the surface.
What is pressure?
The thrust on unit area is called pressure.
Mathematical representation of Pressure.
P=F/A
Pressure is a ____ quantity.
Scalar
SI unit of pressure?
N/m² or N/m-²(Pascal)
Who is The unit Pascal named after?
Scientist Blaise Pascal.
What is Pascal denoted as?
Pa
1 Pa=??
1Pa= 1N/m²
What is a fluid?
It is any substance that has no definite shape and has ability to flow.
What is a fluid?
It is any substance that has no definite shape and has ability to flow.
What did Blaise Pascal observe?
The pressure in a fluid at rest is the same at all points if they are at same height.
What is a hydraulic lift?
The pressure is same on both sides of the enclosed fluid, allowing a small force to lift a heavy object.
What is the mathematical representation of hydraulic lift?
P=F1/A1=F2/A2
What is density of a substance?
The density p of a substance is defined as its mass per unit volume.
What is mathematical representation of density?
P=m/V
(v is volume)
What is SI unit of density?
Kg/m³
Cgs unit of density.
g/m³
What does density depend on?
The distance between molecules and atoms. The greater the distance, the smaller the density.
What is Relative Density (R.D)?
The relative density of a substance is the ratio of its density to the density of water.
What is R.D also called as?
Specific gravity
Mathematical representation of R.D?
R.D=Ps/Pw
(s is substance and w is water)
What is the unit of R.D?
SI unit=(kg/m³)/(kg/m³)=unitless
If we make two holes in two containers containing liquid with same height?
P2-P1=Pgh
Which substance has highest density?
Mercury. 13.6×10³ kg/m³
