The air pressure inside a passenger tire is 228 kPa. What is this pressure in atmospheres?
The pressure is
Let's use the concept of conversion factors to convert the units of pressure as requested. We start by finding the equivalent number of Pa represented by an atmosphere, or Atm:
We can write this as a conversion factor as
both of which are true. We then select the one that cancels the units we want to get rid of and leaves the ones behind that we want
Where we have also used the conversion factor for