Bernoulli-Tube-Airflow-&-Pressure-Demonstration-Apparatus-RVFM-PH10635-P-This-Bernoulli-tube-apparatus-clearly-demonstrates-that-the-speed-of-flow-increases-&-pressure-decreases-in-a-constricted-section-P-P-A-500mm-long-tube-with-a-10mm-bore-is-constricted-near-its-centre-A-short-side-tube-in-each-of-the-3-sections-allows-the-connection-of-a-manometer-tube-The-3-manometer-tubes-clearly-show-that-the-pressure-in-the-constricted-centre-section-is-lower-than-in-the-2-outer-sections-P