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 Constitution was written during the Philadelphia Convention, which took place from May 25, 1787 to September 17, 1787. The Constitution was signed on September 17, 1787 in the Assembly Room of the Pennsylvania State House. It did not go into effect until June 21, 1788 when nine states ratified it.