What will happen if the you place a smoke source near the hole?

If you place a smoke source near a hole, the smoke will likely flow into the hole due to differences in pressure or airflow. This can create a visual effect where smoke is drawn in, potentially indicating that the hole leads to a lower pressure area or a vacuum. Depending on the size and nature of the hole, the smoke might also exit from other openings, creating a flow pattern. Overall, this demonstration can illustrate principles of fluid dynamics and airflow.