Well I would personally say the engineering industry, as during the wartime technology needs to be developed/improved in order to defeat the opposing side.
It has a heavier mass and gravity tends to pull on it more than a basketball.
That statement is true.
In initial phase of the relationship, it is far easier to hide a certain character from your partner since both individuals haven't been exposed to each other's habbit.
Once you confess a certain weakness, you no longer be able to choose which character that you wanted other to perceive because the illusion that you put as a front for your previous character is already shattered.
A lot of farmers use machines like tractors and plows ect. There is also specific ways to get specific plants out.
Hard tack, salted pork, beer, and other lasting things.