What's an example of a task that requires knowledge of physical objects to perform?
How can I remove an oil-based paint stain from my clothes?

What's an example of a task that requires knowledge of physical objects to perform?
To exercise your jaw muscles regularly,

What's an example of a task that requires knowledge of physical objects to perform?
how to cut thin strips of wood on a table saw

What's an example of a task that requires knowledge of physical objects to perform?
How do you glue canvas?