Question

Can u show me how u get the answer​

Answer 1

Step-by-step explanation:

`p1 * v1 = p2 * v2`

`p1 = initial \: pressure \\ v1 = initial \: volume \\ p2 = final \: pressure \\ v2 = final \: volume`

You're looking for p2. So, divide both sides by v2...

`(p1 * v1)/(v2) = p2`

volume of a cylinder is

`h * \pi \: * {r}^(2)`

let's assume r = 1

`(p1 * (20cm * \pi))/((60cm * \pi)) = p2`

the Pi's cancel out, the 20/60 can be reduced to 1/3.

So you end up with

`p1 * (1)/(3) = p2`

or as the book shows....

`(1)/(3) p`