Equipment users can detect cavitation audibly, visually, by acoustical instrumentation, by machine vibration sensors, through sonoluminescence measurement or by a decrease or change in performance from that produced under single-phase flow conditions (for example, loss of flow, rigidity and response).
The members of the Constitutional Convention signed the United States Constitution on September 17, 1787 in Philadelphia, Pennsylvania. The Constitutional Convention convened in response to dissatisfaction with the Articles of Confederation and the need for a strong centralized government.
The bronze statue portraits featured on these pages are based on the National Constitution Center Signersâ Hall. This exhibit features life-size bronze statutes of 42 men: the 39 delegates who signed the Constitution on September 17, 1787, as well as the three who refused. Click here to learn more about the day we honor the signing of the U.S. Constitution.