A Formula for Pressure
When you press your hand against a wall, you are applying _____ on that particular area of the wall.
pressure
Something that compresses when you land on it ______ the force of the fall gradually.
absorbs
Another useful property of gases is their ability to exert a force back or a _______ when they are compressed.
a counterforce
Pressure can be calculated by using this formula:
P=F/A
Gas molecules distribute themselves ______ throughout their containers.
equally
Gases are made up of particles that have mass and, therefore, weight. Weight is the _______ pulling on a mass.
force of gravity
Force is measured in ______ and area is often measured in ___________
newtons (N)
square metres (m2).
Gases are compressible because their particles can be ______ closer together into a smaller volume.
squeezed
The most common device for measuring air pressure is a _________
barometer.
The unit for pressure, therefore, is newtons per square metre (N/m2). This unit is also called a ________
pascal (Pa),
Because solids and liquids cannot be squeezed into a smaller volume, they are said to be almost _______
incompressible.
The earliest barometers were made with ______ and are still used by many weather stations.
mercury
A kilopascal (kPa) is equal to________
1000 Pa.
An applied force is transmitted from one particle to the next, in both ____ and ____ This is similar to dominoes falling in a row.
solids and liquids.
Bottled pop on store shelves does not look carbonated because it has been bottled under _______
pressure.