What's an example of a task that requires knowledge of physical objects to perform?
How to make Blackberry tarts.

What's an example of a task that requires knowledge of physical objects to perform?
Make a saw blade guard.

What's an example of a task that requires knowledge of physical objects to perform?
How do you know if you have successfully made magnetic silly putty.

What's an example of a task that requires knowledge of physical objects to perform?
How does one make a call from a telephone booth?