terms from Science book Flashcards
explain the term pressure
the amount of force acting on a unit of area
how do you calculate pressure
pressure = force/area
example is a brick resting on a table
first calculate the force that the brick puts on the table.
then calculate the area of the brick in contact with the table and last divide the force by the area
REMINDER… what s force
Force causes a stationary object to move,
Force is measured in newtons =N
what is formulae for calculating force
Force = pressure x area
what is the formulae for calculating pressure
Pressure = force / area
to calculate area
Area = force + pressure
does pressure increase or decrease the deeper you go
pressure increases the deeper you go, e.g. divers can only diver a certain depth safely because the pressure increases the deeper you go
does pressure increase or decrease the higher you go
pressure decreases the higher you go.
e.g. climbing Mt Everest the air pressure decreases the higher up you climb and this means less oxygen making it hard to breath
units used to measure pressure are
N/cm2 or N cm-2
or
N/m2 or N m-2 or pascal (Pa)
the triangle for numerical questions
P X A
how would you increase pressure
increase force and decrease area
important details about air
air has mass and can be measured
air can take up space therefore it has volume
how is atmospheric pressure measured
with a barometer
what weather do we get with low atmospheric pressure
wind and rain
