What's an example of a task that requires knowledge of physical objects to perform?
To remove rust from a cast iron pan

What's an example of a task that requires knowledge of physical objects to perform?
Use emergency stain remover.

What's an example of a task that requires knowledge of physical objects to perform?
To cheaply sand curves with sandpaper.

What's an example of a task that requires knowledge of physical objects to perform?
How to prevent stains from forming at a desk from drinks?