What's an example of a task that requires knowledge of physical objects to perform?
How to make sure the knob offers good grip?

What's an example of a task that requires knowledge of physical objects to perform?
How can you limit soap usage?

What's an example of a task that requires knowledge of physical objects to perform?
To make a music stave bracelet,

What's an example of a task that requires knowledge of physical objects to perform?
When making scalded milk how do you know when to take it off the heat?