What's an example of a task that requires knowledge of physical objects to perform?
To roll a burrito, you can

What's an example of a task that requires knowledge of physical objects to perform?
To make old glass bottles into an instrument,

What's an example of a task that requires knowledge of physical objects to perform?
How can I preserve the condition of my cashmere sweater?

What's an example of a task that requires knowledge of physical objects to perform?
How to ozonate your drinking water?