In the equation P1V1=P2V2 what do the numbers mean?

1 is the lowest and 2 is the highest

1 is the starting and 2 is the ending

they tell you how much pressure and volume there is

They don't mean anything

1 is the starting and 2 is the ending

Explanation:

The numbers in this problem tells us the starting amount and ending value.

This equation:

         P V    =   P  V

is one of the gas laws. Particularly, this is called Boyle's law. The law relates volume to pressure.

Here is the postulate "The volume of a fixed mass of gas is inversely proportional to the pressure provided that temperature is constant".

  P V    =   P  V

P₁ is the starting pressure

P₂ is the ending pressure

V₁ is the volume at starting pressure

V₂ is the volume at ending pressure

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

d) physical means can be used to separate the components of air.