What's an example of a task that requires knowledge of physical objects to perform?
To make wavy lines in Photoshop

What's an example of a task that requires knowledge of physical objects to perform?
Keep food warm for tailgates.

What's an example of a task that requires knowledge of physical objects to perform?
napkins

What's an example of a task that requires knowledge of physical objects to perform?
How can I painlessly get rid of a splinter?