I think she was referring to the general tone of the post, especially the statement that was something along the lines of "this is High School Physics to me." Whether or not it is or isn't to you does not guarantee that the person you're helping is in the same place. When you combine a statement such as the given with getting basic "High School" things such as unit conversions wrong, it definitely does come off as something that is deserved.
Physics: serious business.
I believe that the pressure difference would be 100 kPa, if it helps, not 1 kPa, which is why your original answer was off by two decimals. The atmosphere outside of the cooker is the reference point; gage pressure is the difference. The rest of problem number two seems like it is just finding the right conversions and canceling out units.
cba to do the first one.
WAY TO NINJA MY POST RUBAH