What's an example of a task that requires knowledge of physical objects to perform?
To unclog a sink drain using boiling water,

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

What's an example of a task that requires knowledge of physical objects to perform?
Block Caller ID function.

What's an example of a task that requires knowledge of physical objects to perform?
How to make a hole in the bottom of a galvanized metal bucket for a craft.