What's an example of a task that requires knowledge of physical objects to perform?
When boiling butter, when it's ready, you can

What's an example of a task that requires knowledge of physical objects to perform?
To increase body strength without access to a gym,

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

What's an example of a task that requires knowledge of physical objects to perform?
To use a mortar and pestle