What's an example of a task that requires knowledge of physical objects to perform?
How to Whistle

What's an example of a task that requires knowledge of physical objects to perform?
How to paint the box for a solar air heater?

What's an example of a task that requires knowledge of physical objects to perform?
To avoid fake check scams, business should instead

What's an example of a task that requires knowledge of physical objects to perform?
metal armor