What's an example of a task that requires knowledge of physical objects to perform?
To remove moisture from sand, you can

What's an example of a task that requires knowledge of physical objects to perform?
How to use whatever you have in your fridge

What's an example of a task that requires knowledge of physical objects to perform?
Polish delicate surfaces.

What's an example of a task that requires knowledge of physical objects to perform?
How do I say the alphabet backwards