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Physics
Topic 5: Solid, liquids and gases
Pressure Equation
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Cards (13)
What is the definition of
pressure
?
Pressure is defined as the
force
per
unit
of area.
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How can
pressure
be quantified?
Pressure can be quantified using the
formula:
pressure =
force
/
area
.
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If you apply a
force
of
800
newtons
to a nail head with an
area
of
0.0001
meters
squared
, what is the
pressure
generated?
The pressure generated is
8 million
pascals
or 8,000
kilopascals
.
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What generates pressure in fluids?
Pressure
in fluids is generated by the constant collisions of
particles
with their surroundings.
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What happens when
gas particles
collide with the walls of their container?
The
collisions
create
pressure
by applying a force to the inside area of the container.
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How does water generate
pressure
in a beaker?
Water generates pressure by applying
forces
outwards in all directions as
particles
collide with the glass walls and air surface.
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What do we refer to the
pressure
generated by gases and liquids as?
We refer to it as
fluid pressure
.
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What is the significance of using
perpendicular force
in
pressure
calculations?
Perpendicular force is the component of the force that is at right angles to the surface it collides with, which is used to calculate pressure.
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How does the angle of collision affect the
pressure
generated by a
particle
?
A particle striking
perpendicularly
uses the entire force to generate pressure, while a particle striking at an angle uses only a smaller component of its force.
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How do you calculate the
perpendicular
force
exerted on an
area
given the
pressure
?
You multiply the pressure by the area.
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What is the first step in calculating the
force
from
pressure
in kilopascals?
The first step is to convert kilopascals to pascals by multiplying by
1000
.
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If the
pressure
is
60
kilopascals
and the area is
0.5
meters squared, what is the force exerted?
The force exerted is 30,000
newtons
or 30
kilonewtons
.
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What are the key concepts related to
pressure
in fluids?
Pressure is
force
per unit
area
.
Fluid pressure is generated by
particle collisions
.
Perpendicular force
is crucial for pressure calculations.
Pressure can be calculated using the formula:
pressure = force / area
.
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