What's an example of a task that requires knowledge of physical objects to perform?
How To Make a Liquid Hourglass

What's an example of a task that requires knowledge of physical objects to perform?
To attach a piece of paper to a yardstick, you can

What's an example of a task that requires knowledge of physical objects to perform?
Get ride of mosquitoes.

What's an example of a task that requires knowledge of physical objects to perform?
Clean residue off a drill bit