What's an example of a task that requires knowledge of physical objects to perform?
How can I lose weight?

What's an example of a task that requires knowledge of physical objects to perform?
Remove unwanted paint line.

What's an example of a task that requires knowledge of physical objects to perform?
How to make coffee in electric coffee maker.

What's an example of a task that requires knowledge of physical objects to perform?
How can you keep a brass ring from turning your finger green?