With the temperature held constant, the piston of a cylinder containing a gas is

P1 = 240 kPa.

Explanation:

Given the following data;

Initial volume = 0.3 m³

Final volume, V2 = 0.9 m³

Final pressure, P2 = 80 kPa

To find the initial pressure, we would use Boyle's law;

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by the formula;

Substituting into the formula, we have;

Therefore, the initial pressure of the gas is 240 kPa

In this example, the scenario will be the fact that I have started high school. I believe that because of this, my curfew should be different. This is an example of a dialogue that would discuss this:

Me: "Mom, dad. I want to talk to you."

Parents: "Sure. What is it?"

Me: "But please, listen to the end. I was just thinking that maybe I deserve to have a later curfew now."

Parents: "Ok"

Me: "It's just that, now that I have started high school, I really feel mature enough to manage my own time. I think that school's is going to be much tougher and I will have more work. So I also deserve more time to relax. And if my curfew is different, then I will have more time to do the things I want."

Parents: "Well... we'll think about it."

Me: "Please, consider it. I will also be making more friends, and spending time with them is also important. I promise I will take care of school and my grades."

Parents: "Ok, let's try it for a month, and see how it goes."

Me: "Thank you!"