What's an example of a task that requires knowledge of physical objects to perform?
To make green paint, you can

What's an example of a task that requires knowledge of physical objects to perform?
To make a transparent origami crane.

What's an example of a task that requires knowledge of physical objects to perform?
to press down the inner loop of the doggie bow tie

What's an example of a task that requires knowledge of physical objects to perform?
How to trim white margin from map printout.